Fuel capacity: 15 liters Top speed: 65 km Max Power: 6.9 PS @3600 rpm Max Torque: 15.0 Nm @2500 rpm Weight: 196 kg (kerb) Hayes M1030 Military Diesel Motorcycle | Image: Motocross Action Magazine 2. 1 Yamaha RAIDER 1900 motorcycle in Aurora, CO, 1 Yamaha RAIDER 1900 motorcycle in Gering, NE, 1 Yamaha RAIDER 1900 motorcycle in Greer, SC, 1 Yamaha RAIDER 1900 motorcycle in Lebanon, PA, 1 Yamaha RAIDER 1900 motorcycle in PALM COAST, FL, 1 Yamaha RAIDER 1900 motorcycle in Spotsylvania, VA, 1 Yamaha RAIDER 1900 motorcycle in las vegas, NV. They are known to produce less noise than air-cooled motorcycles. Air-cooled engines were designed to last, even in hot summer months and in traffic. Back to America, VW Motercycles says that the vast majority of Volkswagen-powered motorcycles started their lives as BMWs, often R60/2s from 1960 to 1969. When the liquid circulates, itll go through plates that will keep things even cooler because of the wind that passes through. Crate engines arrive fully assembled in a large wooden crate. Please refer to the Cycle Trader Terms of Use for further information. Post your motorcycle in just a few minutes. Home| Web250 AIR COOLED 2 CYLINDER ENGINE. We're Safe! With liquid cooling, youre using water-based liquid to keep the engine running cool. instruments, bracing wires, motor parts, handles and car frames . Tricycles and spare parts such as the whole tricycles, shock Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device. WebYamaha Raider dirt bike Motorcycles For Sale in Arizona - Browse 2 Used Yamaha Raider dirt bike Motorcycles Near You available on Cycle Trader. How bad can it be? It looks like a Harley-Davidson but could be repaired with zip ties and a hammer. Acruiser motorcycleis built in the style of traditional pre-World War Two American bikes from the 1930s. In addition, its proven powerplant requires very little maintenance. Finally, many modern Harleys have a built-in safety system to prevent overheating at idle. .content_format table{border:1px solid #dedede; border-collapse:collapse;} The first liquid cooled motorcycle was the Suzuki GT750, a 3 cylinder 2-stroke produced from 1971 to 1977. There arent any specialized parts of gadgets that make air cooling possible, and thats why its still sticking around. Hi, my names Troy. They are also cheaper to repair and dont come with as many parts. |Help stably due to our long-term friendly cooperation with many Motor vehicles and partsshock absorbers, wheels, tires, cover Copyright 1995-2023 eBay Inc. All Rights Reserved. Send it to ushere. The many crate engine manufacturers are convenient as they give purchasers a large variety of options to choose from. Inspired by our motorcycles and the sport heritage lifestyle. View cart for details. We and our partners use cookies to Store and/or access information on a device. Twitter: @Miss_Mercedes30 BMW R 18, from 16,999. The biggest boxer ever was also its first new air Classic style. Liquid cooling is another way that motorcycles can cool down, but it works a little differently than air cooling. I started riding motorcycles with Clay mid-2020 and soaking up his vast knowledge of bikes. Liquid cooling is a little more difficult to understand than air cooling, but both cooling methods will effectively cool down a motorcycle. It looks like a Harley-Davidson but could be repaired with zip ties and a hammer. Site Map Its sort of wild that theres not much written anywhere about this, and the only source is one written by another enthusiast and builder of VW-converted motorcycles. Client is god as well as keep providing excellent after-sale WebThe ACH-1 by Feher Helmets is the worlds first self-contained air-conditioned motorcycle helmet available to the public. When you are looking for a complete engine for your motorcycle, there are a lot of options available to you. mercedes@theautopian.com The coolant will typically have alcohol in it so that oxidation, rusting, and freezing dont occur. Because fewer parts need to be installed, customers can enjoy some added cost savings. While it is true that airflow over the fins will assist in dissipating the heat, it doesnt have to be a a strong wind. This great little machine hits the motorcycling sweet spot perfectly: Its just the right size to enjoy at a campground or exploring the countryside. There are several things to keep in mind when considering going with an air or liquid-cooled motorcycle. The page writes that other companies that used horizontally-opposed engines like Ural and Dnepr also gave up their frames to Volkswagen engines. The liquid used isnt just water. BMW have only the R nineT. WebMotorcycles on Autotrader is your one-stop shop for the best new or used motorcycles, ATVs, side-by-sides, and UTVs for sale. Suppliers| WebMotorcycles have been air-cooled since the late 1800s and only in more recent times did many manufacturers switch over to liquid cooling. outstanding suppliers.Client is god as well as keep providing excellent after-sale The Yamaha Raider is a motorcycle from Yamaha's Star Cruiser line. We're Fast! Passages into the engine allow this liquid to freely circulate. Of course, since were talking about a custom motorcycle here, really any motorcycle could give its frame up to fit a Beetle engine. They are fully built and ready to be installed on a bike. Rated 5.00 out of 5 $ $ Select options; Sale! Carole Nash Insurance Consultants Ltd. All rights reserved, Ducati release their accessory packages for the Diavel V4, Husqvarna lifts the covers off their Norden 901 Expedition, Triumph TE-1 prototype wins the GQ Electric Motorbike of the Year award. On a URAL everything in the engine usually has a short life, so.. Gottdang, that things got a bigger VW engine than my VW! WebMinnesota (1) Nebraska (1) The Suzuki TU250 started being produced in 1994 as a lightweight street bike. WebYamaha Raider 1900 dirt bike Motorcycles For Sale - Browse 7 Used Yamaha Raider 1900 dirt bike Motorcycles available on Cycle Trader. For some riders, theres nothing to beat the purity of a simple air-cooled motorcycle but, in recent years, this most traditional engine type has verged on extinction due to tougher emissions laws. One of those people was Rodger Willis, who is said to have originally worked with Jacks BMW to build complete converted motorcycles and kits. As youre driving your motorcycle, the increased volume of air passes through the fins and lowers the temperature. Thank you for visiting www.powersports.honda.com. Do they have a frame or something to keep them upright? Where air-cooled motorcycles have fins on them, liquid-cooled motorcycles will have water jackets located inside of the engine and near the cylinders. I have a spare 1300cc VW engine in the workshop and my very cool 1969 MZ Trophy really wont seem to start no matter what I do, so maybe. Most modern motorcycles are liquid-cooled these days. The roadster-styled Honda CB1100EX is arguably the most involving and performance-focused motorcycle in the list. Pros & Cons of Air Cooled Motorcycles Some of the benefits of air cooled motorcycle engines include: Lower cost to build. The odometer shows 24,668 miles, but its unclear how many of those were pre-conversion. 2022 Yamaha YZF-R3: $5,299. Best for those who dont want to spend time maintaining their motorcycles. We love talking bikes, so we will love talking to you! This one looks a lot cleaner though. Theyll instead have a radiator built into them, typically located near the front of the motorcycle. Whenever youre driving in a busy city, youll always hear that cruiser driving by and making a ton of noise. absorbers, wheels, tires, cover devices, electric devices, lamps, .content_format { Whats a highwayPeeeeeeeees?). Hayes M1030 Military Diesel Motorcycle. parts, reverse gear devices, rear axles, boot trunks, front cabs, Benefits of a Liquid Cooled Motorcycle Engine Why Does My Motorcycle Keep Blowing Fuses? There is less pollution with liquid-cooled motorcycle engines. Then to mount the engine, custom motor mounts need to be welded in. 1250cc opposed twin, 136 HP, liquid cooled, six speed, shaft drive. Electric vehicles and accessories such as entire vehicles, shock Great news! Seized engines usually occur when the temperature inside the engine has gotten too hot. The beauty of the VW-powered motorcycle is the fact that the VW engine is a very reliable, very powerful low revving engine with a lot of torque. If you want a cheap, low-maintenance motorcycle to boot around on now and then, then you might be better off with an air-cooled motorcycle. This system, when enabled, automatically switch off the fuel supply to the rear cylinder when it gets too hot. : 2 Cylinder. Do you want a motorcycle that is lower maintenance and cheaper to purchase? Will you know for sure that that is what caused the engine to wear prematurely? I am busy building out this resource. The consent submitted will only be used for data processing originating from this website. The retro-inspired cruisers, bobbers and roadsters are gaining increased admiration, and although most Japanese manufacturers have reigned in the amount of cruiser machines in their ranges, European bike makers are jumping on the opportunity, and the US players never really went away. My thoughts exactly, BMW is light with many horsepower, VW is heavy with few.. There were also a few custom Corvair powered bikes in the 1960s and 70s some of them must still exist somewhere. handles, car frames and so on. margin-bottom: 10px; Your message has been sent to the following suppliers. Parts are cheap, it is low tech and so easy to maintain. This site uses cookies to ensure the best browsing experience on our website. $245.00-$265.00 / piece. } The listing reports that the other conversion parts include the parts that Whitson sold for kits like the intake and exhaust manifolds. Like its Roamer brother, the Bobber boasts a smooth 853cc transverse V-twin air-cooled engine, delivering a grunty sound and an involving ride. Id go back to the Gen One Goldwing I had. Does not fit Trike models. IceBear PMZ125- 1 125cc Fuerza Motorcycle Grom Clone. Many people prefer to purchase completed motorcycle motors for a variety of reasons, the most common being convenience and efficiency in time management. A variety of motorcycle makers, such as Harley, have a wide selection of performance crate engines available. This Model Is C.A.R.B Approved For California. On carbureted Harleys, proper maintenance is critical as we shall discuss in a moment. WebGX 630/690. Liquid-cooled motorcycles run better in all different climates. Complete engines are types of motors that have all the necessary mechanical parts and components correctly placed and in working order. I have an R60/2 and its like 29hp on a good day. Air-cooled motorcycles tend to be less expensive than their liquid-cooled counterparts, so if youre on a budget, you might want to stick with air-cooled motorcycles. 43k miles. An oil-cooled motorcycle engine is an air-cooled motorcycle engine that also has an external oil cooler in it. Find out more, Test ride Yamaha Motorcycles at events near you. I would like your verified suppliers matching service! padding: 2px; The ACH-1 is the worlds first self-contained air-conditioned motorcycle helmet available to the public. The centrepiece in the CB1100EXs frame is a modern 1,140cc air-cooled, four-cylinder engine which is complemented with a slipper clutch, and some chrome-laden Showa front forks and rear shocks. instruments, bracing wires, motor parts, handles and car frames An air-cooled motorcycle engine is the easiest type of cooling method to understand. WebRepair engines with air cooled engines for sale or restore your machinery with a totally new engine. Check to see what model of motorcycle you have and see which types of complete engines will be compatible with it. A very slight breeze will be sufficient in most cases. live CycleTrader App FREE in Google Through further drilling, I did land on the page that the Mecum listing appears to be suggesting, and its called VW Motercycles. On the page is a nearly eight-year-old article detailing why people swap BMW engines for Volkswagen engines, and Whitsons involvement in it. If youve ever heard someone say that they have a seized engine, that means that the pistons inside the engine have melded against the cylinder walls. Air-cooled motorcycles are cheaper to purchase in comparison to liquid-cooled motorcycles. Fuel injection gives the motor fantastic response and modern practicality. All rights reserved. And the rest of the chopper-inspired Raider is pure Star, designed and engineered by the world's best bike builders. Some bikes, like Harleys and my Honda XR650L, are still air-cooled like in the old days. Air-cooled motorcyclesdont use a liquid-based circulation system when cooling down a motorcycle. Calls may be recorded for The products are mainly exported and popular in the Middle East, Please enter 20 to 3000 characters to contact this supplier! No matter how bad your day is, a bike will always make you feel better, thats my motto. An example of data being processed may be a unique identifier stored in a cookie. But, as youd expect, the V9 Bobber combines modern technology with its aesthetics to create a modern retro. Latin America, Russia, East Europe and Southeast Asia.We boast to provide high-quality products and services quickly and The uncertainty about the power output made me wonder, how on earth do you put a bike on a dyno? Twice the complexity of a BMW airhead, but with more weight and the same horsepower! Because air-cooled motorcycles rely on the air to keep them cool, it results in having less control over the temperature that motorcycles get up to. You have been successfully subscribed to Honda Powersports email updates, 2023 American Honda Motor Co., Inc. Powersports Division, We use cookies to improve your experience on this site and show you personalized advertising. For the builder, a unique challenge to build something different with all the fun of overcoming the various barriers that come with a project like this. Making the final decision to go with an air-cooled or liquid-cooled motorcycle will be dependent on a couple of questions that you should ask yourself before finalizing your purchase. In an oil-cooled motorcycle engine, the oil circulates throughout the engine in an oil tube connected to an external oil cooler. A liquid-cooled motorcycle will perform better on both spectrums of temperatures. Apparently, Whitson enjoyed this motorcycle from the 1970s all the way until 2018, when he sold it to a dealership. If you remember Mike Wolfe on American pickers bought a Von Dutch VW powered BMW. And whats the history of Whitsons venture? WebSimply put, the difference between air cooled vs liquid cooled engines is how they maintain and regulate the engines operating temperature. Why not? To find out more, Liquid-cooled bikes have a thermostat that will sense when the engine temperature is getting too hot. WebAir cooled motorcycles were the original type of engine. Its rugged enough to handle trail rides, but is ready for the street too for jaunts into town or on scenic back roads. Its sort of amazing how little is out there. Theriding position usually directs the riders feet forwards and hands up, naturally causing the rider to lean back slightly. WebAir cooled motorcycles were the original type of engine. This provides a far more comfortable riding experience in warm weather. Yamaha Raider Motorcycle: If you want totally custom but would rather ride than wrench, have a look at the Star Raider. Liquid-cooled motorcycle engines are much better for sportbikes and performance bikes. Because fewer parts need to be installed, customers can enjoy some added cost savings. This 1953 Webley-Vickers combines the frame and transmission of a BMW with a 2000cc Volkswagen boxer, resulting in a beautiful machine that was its builders joy for five decades, and even served as a platform to help others make Volkswagen-powered BMWs. Owning one and driving it is very enjoyable due to the fact again, it is a very unique bike that arouses all kinds of interest and questions from those who see it. Its not often that I find nothing tangible about a company, but here we are. Pros & Cons of Air Cooled Motorcycles Some of the benefits of air cooled motorcycle engines include: Lower cost to build. The German giant caused something of a sensation when it launched its all-new classic cruiser. The 113-cubic-inch fuel-injected V-twin engine that powers it takes a back seat to no V-twin when it comes to power and reliability. I started with YouTube videos on my 1988 Suzuki Samurai which you can check out Hey! Quality Suppliers| JT]. |About Us Other attractive details include the slim brushed aluminium side panels and spoked wheels to complete the old-school look. services to customers is the business motto constantly implemented | Why mess with a great thing? . Motorcycles and accessories include entire cycles, shock The more surface area that comes in contact with air, the higher chances that heat will be dissipated. Are you having a tough time trying to decide between an air-cooled and liquid-cooled motorcycle? Just remember that when oil gets too hot too often, it loses some of its lubricating properties. I havent been in forever, but it was full of cool vintage bikes. When I was 25 a friend and I took our old XT500's on a short trip and I fell in love with adventure bike riding.Shortly after getting married my wife and I rode from Cape to Cairo on 200 cc Chinese road bikes. But does it have what it takes to do it? Some air-cooled engines have external oil coolers with a little radiator that sits exposed to the airflow. If the engine gets too hot, the thermostat will sense that and then begin to regulate the amount of coolant getting to the engine. WebGet the best deals on Motorcycle & Scooter Complete Engines when you shop the largest online selection at eBay.com. The CFMoto 300 SR is no exception. Specifications:1)Engine type: 4-Strokes.AirCooled Single Cylinder2)Displacement: 200cc3)Compressingratio:9.0:1, 4)Rated power and rotate speed: 11kw/8000rpm5)Max torque and rotate speed: 13N.m/6500rpm6)Ignition type: C.D.I7) Fuel tank capacity: 8L8)Driving mode: Shaft /chain9)Starting system: Electric10) Gearshift mode:4 forward 1reverse11)Tire(front/rear): 19x7.00-8/18x9.50-812)Brake system : drum(manual)/disc(foot)13)Dimension(L*W*H): 1700*1020*1060mm14)Distance(front/rear wheel): 830mm/775mm15)Distance(axles):1050mm16)Max speed: 60km/h17)Available color: red, yellow, blue, green, black18)Max loaded: 150kg, Outer packing :Carton dimensions :1520*855*740mmG.W /N.W :191/150kg, ConveyanceQty/20' Ft: 12pcsQty40Ft: 28pcsQty/40' HQ: 42pcs, LONGSONG(HONGKONG)TRADING CO.,LIMITED A Volkswagen Beetle engine was cheap and crazy reliable when a Harley-Davidson engine of the era might have broken down on you. [Editors note: Thats a real VW taillight there! Unlike a bike today that cost a fortune to service (forget about fixing some electrical problem on the road), it never breaks! Back to America, VW Motercycles says that the vast majority of Volkswagen-powered motorcycles started their lives as BMWs, often R60/2s from 1960 to 1969. Outdoor air doesnt affect a liquid-cooled motorcycle engine as much as it does with an air-cooled one. And make sure your bike is properly maintained. CycleTrader.com is not responsible for the accuracy of the information. A lot of cruisers use air-cooled engines because people drive them on highways at higher speeds. In the winter, I especially love looking at classic motorcycles while my Triumph Tiger freezes outside. The EITMS can be disenabled by following the instructions in the owners manual. Please provide us with the following required information: By checking this box, I agree to: (1) receive recurring automated marketing and non-marketing calls, texts, and emails from American Honda Motor Co., Inc. and participating Honda and Acura dealers at any phone numbers and email addresses provided above (consent not required to make a purchase, msg & data rates apply, reply STOP to opt-out of texts or HELP for help); (2) the. Probably in a garage corner or in a barn and long forgotten. CLOSEOUT SALE | All our helmets are 30% off for a LIMITED time only! This motorcycle has popped up at Mecum Auctions and its set to roll across the Las Vegas auction block on January 26. WebJoin millions of people using Oodle to find unique used motorcycles, used roadbikes, used dirt bikes, scooters, and mopeds for sale. A fuse that keeps blowing is probably one of the most annoying issues a motorcyclist (or motorist) can face, especially when the problem is intermittent. With rear luggage rack. It is one of their most popular lightweight street bikes available. Its a fairly easy process to simply purchase a fully completed engine thats compatible with your bike. The rear cylinder still moves up and down and essentially becomes an air pump to help cool the rest of the engine. She also has a deep love for buses of all kinds. axles, boot trunks, front cabs, handles, car frames and so on.VI. A 2003 model was introduced, with its air-cooled 112.4 cu-in in-line four, four-stroke 1845 cc engine. The page notes that you still wont be done yet, as the original BMW clutch needs to be modified so that it doesnt slip under VW power, and the transmission itself needs to be regeared. VW Motercycles goes on to note that BMW was a popular choice because the motorcycle manufacturer already used boxer engines, making a Beetles engine a natural fit, and an aesthetically-pleasing one at that. No maintenance hassles here, even in the case of an off-road tip over. 2023 The Autopian. And I know what Im talking about, having owned an URAL for fun besides my 1977 BMW motorcycle. Electric vehicles and accessories such as entire vehicles, shock Comes With Title For Registration. As the page explains, using the original gearing would result in a low top speed as the transmission was made for the higher-revving BMW engine. live CycleTrader App FREE in Google Play MENU Engine 140CC Manual Clutch Kick Start 4 Gear Motorcycle Air Cooled Engine Motor PIT PRO DIRT BIKE. consent for cookies to be used. Ive found a motorcycle that seems to do so much right. The acceleration of liquid-cooled motorcycles is known to be much more reactive than air-cooled ones. This is one of those questions where you will probably never get a clear answer. Our Suspension Engineer Explains Why This One Suspension Design Parameter Has Such A Huge Effect On Ride, Handling, And Body Roll. That way, you arent left trying to kick a VW engine into life using a BMW kick starter. Maintain your bike properly and change the oil at regular intervals (more frequently if you live in really hot climates) and you should be fine. Web0.8L, Air cooled motorcycle oil with clutch additive: Gear oil type and capacity( in liters) N/A: Battery: 12V/4Ah: Light: Standard Lights: Suspension(Front/Rear) Sale! More searching reveals anecdotes from motorcyclists claiming that theyve seen or worked VW-converted BMWs in the 1960s and 1970s. The latest model makes its power from a 942cc V-twin air-cooled engine, has upgraded suspension for a plusher rider and comes with ABS as standard. 2 pieces (Min Order) CN Yiwu Great Auto Parts Co., Ltd. 2YRS. The 1200 Custom is part of Harley-Davidsons Sportster lineup, and it lives up to its Custom name with its muscular front end and a more aggressive riding style than its siblings. When youre driving your air-cooled motorcycle, the wind will move through the fins and keep the motorcycle at a cooler temperature. WebHonda Crf 150F Motorcycles For Sale in Duncansville, PA - Browse 1 Honda Crf 150F Motorcycles Near You available on Cycle Trader. Eyes the Super. I read all the forum threads I could find on the topic and found many different opinions. Antifreeze is used because its more tolerant to hot and cold temperatures. parts, reverse gear devices, rear axles, boot trunks, front cabs, Indian was Americas first motorcycle company, and the Indian Chief Dark Horses style has stayed true to the brands roots, continuing a tradition of classic design with looks that wouldnt be out of place on Route 66 in the 1940s. This is why. Don't miss what's happening in your neighborhood. Searching through various motorcyclist forums, it seems that one motivation to put a Volkswagen engine in a motorcycle is similar to why the Brazilian AME Amazonas 1600 exists. Laid back motorcycling is benefiting from some recently renewed popularity, seemingly driven by the rise of the retro scene, its aesthetics and lifestyle over the sheer performance of the bikes. Liquid-cooled motorcycle engines have more reliable cooling, making them a better option when temperatures get too extreme levels. Or check out the stories onour homepage. cookie policy, Customize Your Ride with Honda Accessories, Stay up-to-date on the latest news from the XR650L. Air-cooled motorcycles dont have hoses, a thermostat, or a radiator, making it much more straightforward if you ever need to repair something. CycleTrader.com is not responsible for the accuracy of the information. Even though the cooling system on motorcycles seems pretty straightforward, there can be detrimental consequences if the cooling system fails to function how it should. For information including how to stop them, click Cookies & Privacy Policy.In the UK, Carole Nash Insurance Consultants Ltd is authorised and regulated by the Financial Conduct Authority, under firm reference number 307243. I was hoping it would make that chirping sound like a 60s beetle with the pea shooter exhaust tips. If your motorcycle didnt have those fins, it would overheat much quicker. Air-cooled engines have fins on the cylinder head that radiate heat into the air and away from the engine. WebThats what youre going to experience again on a new Honda XR150L. WebFits 21-later Touring models equipped with air/Oil-Cooled Milwaukee-Eight engine. It's all possible with Alibaba. Liquid-cooled motorcycles are built a little differently than air-cooled ones. Air-cooled motorcycles do not provide as much power output as liquid-cooled motorcycles because the more power output, the hotter the engine will get. You can check this on the Financial Services Register by visiting their website.Carole Nash Copyright 2009 - 2023 benadorassociates.com. Tell us about your vehicle to find the right parts faster, Honda designed motor engine z50 crf50 50cc z-50 xr50 crf 50 kit, 3 product ratings - LIFAN 125cc 4 Gears Manual Clutch Engine Motor PIT PRO TRAIL DIRT BIKE ATV GREY, 2 product ratings - BT 125cc 3+1 Semi Auto + Reverse Engine Motor PIT QUAD DIRT BIKE ATV DUNE BUGGY, 2 product ratings - 49cc 2 stroke Pull Start Engine Motor Mini Pocket PIT Quad Dirt Bike ATV Buggy, 3 product ratings - BT 125cc Auto Engine Motor 4 Gears Up Kick Start Semi PIT PRO Quad Dirt Bike ATV, 3 product ratings - BT 125cc 1+1 Auto Engine Motor + Wiring Kit + Carby QUAD DIRT BIKE ATV BUGGY. The word military should be your first clue that the Hayes M1030 is a cut above the average diesel bike. Yes! The decision doesnt come as easy as one might think, and its always helpful to look through some valuable information that can help you better decide on what one to go with. Most recently in 2020, Whitson was praised by V8 motorcycle builder Boss Hoss for taking one of the companys chunky bikes 3,000 miles down highwayPeeeeeeeees in Alaska. Busted bike, 2. Air cooled engines rely on nothing but This will help cool the engine more efficiently. The SR400 is powered by a 399cc, single-cylinder, air-cooled, SOHC, 2-valve engine that produces a torquey, thumper engine character that makes it an absolute blast to ride. Air-cooled motorcycles tend to be noisy, and youll always look twice when you see a cruiser driving past because of how loud it is.