A torque converter has a variable speed system between the driver and the driven pulleys so it can improve upon this ratio, which gives the torque converter an advantage over a straight clutch system. (12 teeth on the clutch means a 72-tooth rear sprocket). So if you count 10 teeth on the clutch there should be 60 teeth on the rear sprocket. This means for every tooth on the clutch there are six teeth on the rear sprocket. The sprocket on the engine and the one on the rear axle should have a ratio close to 1:6. If you know ahead of time that you will exceed the 400 pounds, then buy a torque converter and avoid the problems of burning up the clutch asking it to do more than it was designed for. The kart weighs around 150 pounds add to this the driver (and passenger weight, if it is a two-seater kart). A good rule of thumb is the kart and driver (and passenger when it is a two seat kart) should not exceed 400 pounds. Once the weight limit is exceeded, then the life of the clutch will be shortened. Big tires look neat on a kart but problems are created by changing to bigger tires when the clutch isn’t designed to handle them.Ī centrifugal clutch is designed to be able to move a certain amount of weight. If driving on smooth flat terrain then you may be able to get by with 14” tires, but on hilly terrain or deep grass, then you are putting additional strain on the clutch, which will cause premature wear. Tires exceeding 13” in diameter stress the clutch if the vehicle is not properly geared for the larger tires. Putting on tires that are larger than what came with the kart will result in clutch problems.
MOTOR MOUNT PLATE FOR MINI BIKE CHOPPER FULL
The longer at full throttle the better off it is for the clutch, because it gives it a chance to cool off before the next engagement. If the shoes turn purple from excessive heat more than likely the clutch is ruined and the spring no longer has the ability to pull back the shoes at idle. The tremendous amount of heat generated can also anneal the spring, which is the heart of the clutch. When the clutch is not locked up, the shoes slip against the drum causing tremendous heat, which dries up the lubrication in the oil impregnated bushing. Full throttle locks the shoes in the clutch against the drum. Driving at full throttle gives the clutch a chance to cool down. Bad Driving Habits Ruin ClutchesĪ clutch starts to engage around 2,000 rpm and will lock up around 2,600 rpm. A new chain is cheaper than a new clutch. If the chain gets kinky from lack of oil it should be replaced before it damages the clutch sprocket. It’s a good idea to oil the chain at the same time. When oil gets in the drum portion of the clutch it will cause excessive slippage, which means undue heat will be generated.Ī good oil like 10W30 or a straight 30 weight oil is recommended. The holes on the drum are to let the hot air out of the clutch. If you don’t give the oil time to get down to the bushing, the oil will fling off, which is the same as not oiling it at all because the oil never reaches the bushing.ĭon’t put oil inside the clutch. If you oil the clutch before operating, give the oil a few minutes to penetrate down into the bushing. With the engine off, squirt several drops of oil behind the snap ring while the bushing is warm. There’s an internal bronze bushing behind the snap ring at the end of the clutch that requires lubrication. The clutch continues to generate heat until it engages. You’ll have to oil the clutch even more often if operating in a small area, never going fast enough to engage the clutch all the way. Oil the bushing that is located in the sprocket at least once every two hours of driving time. The clutch must be replaced if it has heat damage and won’t disengage, and heat damage is not covered by warranty. You can see heat damage inside the clutch drum, the metal turns from black to a blue color.
When heat damage occurs, the clutch will never disengage and the vehicle will start taking off by itself as soon as you start the engine. By properly oiling your clutch you can avoid heat damage.
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