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| | Clutch Kits Clutch Kits are needed when you put over size tires and more aggressive tires. The stock clutch setup is designed to work good with the stock size tires. When you put 2 to 5 sizes bigger of a tire on a belt driven atv, you change the final drive gear ratio and hurt the low end torque of the atv and you will have excessive belt slippage. Clutch Kits come in several different configurations,(sport utility, mudder, extreme). There is two clutch's, a primary and a secondary. The primary has weights and a spring that can be changed for better performance and more stall, the secondary clutch has a belt tension spring that can be changed to a stronger one to keep the belt from slipping but can also hurt acceleration and cause more belt heat. Some secondary clutches us a seperate helix behind the clutch that can also change the acceleration. When ever you do a engine modification, you will have to do a clutch mod. to get the added power to the back wheels or you waisted your money on the mod. We recommend you start with a sport utility kit and then change the springs and weights from there. The true way to adjust the clutches is to use a Dyno. |
| Performance exhaust pipes and complete exhaust systems will give you more power with help from a jetkit or for efi models a programer. ATV's come out of the factory running lean, when you add a performance exhaust you make it run even leaner. Lean or to rich isn't good. Lean can make the engine run hot and burn exhaust valves and damage pistons. To rich causes carbon buildup on top of the piston, foul spark plugs, and plug up exhaust systems causing piston knock and lose of power. We even jet stock bikes to get them to run better.Depending on the altitude were you live will determine how you jet your bike. Low altitude(richer)high altitude(leaner). When you jet a carburator you should use a jetkit like Dynajet. It comes with several main jets, needle and slide spring. Just changing the main jet will not work. It also comes with a base setup for your atv setup and altitude.EFI models are a little easier to modify because the fuel systems ccompensates on its own for changes. Depending on the stock ECM fuel programing on some brands you may not have to use a programer. The best way to be sure is to due a spark plug test. |
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| Belt Drive compaired to automatic (Honda) transmission. The belt drive transmission is far better for modifying, the sealed automatic transmission can not be modified,it is sealed in the engine. Also with a belt drive the belt will start slipping or brake when under extreme load where as the automatic will brake something in the motor and can only be fixed by taking the motor out off the frame and taking it apart. It is allot easier and cheaper to change a belt than to take a motor completly apart. When puting bigger tires on the belt drive bikes you can clutch kit them to regain the low end back, this can not be done on the automatic trans. |
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