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Originally Posted by joshstep1
So they only last about 25 miles?!?!
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no , you get better milage than that but don't figure in miles , rather figure in hours of use depending on what you are doing. If your just casual riding on flat smooth ground mostly then rollers can last all year. Hill climbing/rock crawling can wear them out in a few days.
When I said I use 3 or 4 sets a weekend, this is under competition conditions. The C.V.T. [Constant Velocity Transmission] is under a abnormal amount of strain and heat. When we race, flat spotting rollers can happen at any moment. I constantly change out rollers to insure I stay on top of my game. We do hare scamble/rally racing which is about as hard on a buggy as you can get! Running ATV trails as fast as possible for miles at a time we don't slow for bumps and jumps! Down on the gas and hold it there as much as possible. Cracked frames, bent wheels,shredded belts, busted shocks/ ball joints and cooked cvt's are common.
You said you were going to 10 gram sliders. Remember sliders work like a roller that is 1 to 2 grams lighter. So a 10 gram slider will act like a 8 gram roller. you will never get to high gear before the motor rpms peak out. Thats fine for serious climbing where you don't need speed just torque. but you probably won't get over 20 mph before the motor over revs. A good general all purpose weight is 12 gram rollers or 13 to 14 gram sliders. This weight will give decent response through out the rpm range in a slightly modded 150 for most all riding
I change weights according to the type of terrain we will ride in. Lighter weights for hilly, rocky, rough muddy trails where top speed might not be possible. Then the heavier weights for flatter, smoother ground where we can mostly run wide open and don't need the extra pulling power
The ONLY thing roller or slider weight has an effect on is the amount of time the cvt takes to change gear ratios. Too light a weight,the motor reaches full rpms before the transmission has time to reach top gear. It will be like you are stuck in 1st gear. motor screaming but you won't get speed. Too heavy the weights, the transmission shifts up too fast before the motor has enough rpms to make power.Like trying to start off in 3rd gear the motor bogs down and it takes forever to get up to speed. Think of it like riding a mountain bike. you stay in 1st in the rough stuff so you don't wear your legs out but you pedal like hell to try to get any speed. then you can switch up to 3rd when the speed gets up and pedaling gets easier.
If you followed this and are not totally confused by now ,I'l throw another variable into the mix that has a lot to do with cvt performance. The engagement springs in the clutch These are the springs that allow the clutch to engage at a certain rpms. These have an effect on how well the roller/ slider weights work also Stock springs engage the clutch around 2800 rpms to 3100 rpms at take off. this is just fine for most all normal use.An example where you might want to alter clutch engagement would be in a drag race. You want to reach top speed as fast as possible so you would use stiffer clutch springs and heavy weights. The motor spins up to 4500 to 5000rpms to get in the power range before the clutch engages then the heavy weights get it to top speed as soon as possible. light springs with light weigths allow a smother slower takeoff without spinning the tires and hold the power at low speed for climbing.
I didn't mean to write a book here but I sensed a bit of confusion over the cvt transmission so I thought I could help to clear some stuff up. Don't get too worried over all this. For now, stick with the stock clutch springs , use some 12 gram rollers or slider equivalent, then go have fun!