Evolution Powersports / Turbie Performace Belt Life Improvement Products

[Evolution Powersports]

My question is how much do you have to invest? Not bad mouthing EVO but supposedly the upgrade team tied clutch was suppose to be the fix. And we blew a belt the next day with that clutch set up? Next thing after another. hopefully someone finds something that works soon

The stock secondaries (especially on the 12's) turned to junk very quickly - within about 700 miles. For those who's problem was a bad secondary, this was the fix. Others had compound problems as JustBoostit said.

 

[drumz11]

My question is how much do you have to invest? Not bad mouthing EVO but supposedly the upgrade team tied clutch was suppose to be the fix. And we blew a belt the next day with that clutch set up? Next thing after another. hopefully someone finds something that works soon

There is no proven fix so far. If there was, everybody would be buying it! There are a whole lot of aftermarket products out there to help certain things which may or may not work. The aftermarket companies love this turbo! $$$ Start with the basics. Alignment, non binding clutches and go from there. It may be a combination of things. If you think there is one product or think that you need to dump 3k into it in aftermarket products to keep a belt on, you might be pissing away a lot of coin. This year should be interesting as far as Cat's supposed fix's and another season of riding and new aftermarket products.

 

[Evolution Powersports]

There is no proven fix so far. If there was, everybody would be buying it! There are a whole lot of aftermarket products out there to help certain things which may or may not work. The aftermarket companies love this turbo! $$$ Start with the basics. Alignment, non binding clutches and go from there. It may be a combination of things. If you think there is one product or think that you need to dump 3k into it in aftermarket products to keep a belt on, you might be pissing away a lot of coin. This year should be interesting as far as Cat's supposed fix's and another season of riding and new aftermarket products.

Think about it like this:

Take a top down view of the engine/jackshaft arrangement. You have two wobble bearing supporting a jackshaft that in no way, shape or form resembles the quality of a Yamaha shaft. Now you have a 200+ hp motor pulling on the cantilevered end of the shaft. There is nothing to keep the jackshaft from bowing in the middle between the two bearings and knocking the secondary out of parallel with the primary under load. Your parallelism can be dead nuts on at rest, but will not be when the sled is going down the trail or climbing a hill. Cat fixed the center to center on this sled, but as a result, gave us a sled where the parallelism can change substantially depending upon how the production tolerances of parts line up.

With the TCL left in place, the parallelism of the primary can change by 40 thou + depending upon how far the mag side rocks forward under load. You can test this by putting gauges on the primary in relationship to the secondary and push the mag side forward.

Again, there is a reason Cat dropped the TCL like a hot potato at the very first opportunity (7000/Viper) and it is likely Yamaha insisted upon the change.

Cats new secondary will help by dissipating heat, but will not go to the root source of the heat. I would highly recommend that anyone who has not invested in aftermarket clutch to get the new Cat clutch.

 

[Turbo11T]

Think about it like this:

Take a top down view of the engine/jackshaft arrangement. You have two wobble bearing supporting a jackshaft that in no way, shape or form resembles the quality of a Yamaha shaft. Now you have a 200+ hp motor pulling on the cantilevered end of the shaft. There is nothing to keep the jackshaft from bowing in the middle between the two bearings and knocking the secondary out of parallel with the primary under load. Your parallelism can be dead nuts on at rest, but will not be when the sled is going down the trail or climbing a hill. Cat fixed the center to center on this sled, but as a result, gave us a sled where the parallelism can change substantially depending upon how the production tolerances of parts line up.

With the TCL left in place, the parallelism of the primary can change by 40 thou + depending upon how far the mag side rocks forward under load. You can test this by putting gauges on the primary in relationship to the secondary and push the mag side forward.

Again, there is a reason Cat dropped the TCL like a hot potato at the very first opportunity (7000/Viper) and it is likely Yamaha insisted upon the change.

Cats new secondary will help by dissipating heat, but will not go to the root source of the heat. I would highly recommend that anyone who has not invested in aftermarket clutch to get the new Cat clutch.

Very good explaination! Thank you!

 

[TURBIE]

Well said Jim that's what I would say.