Brock
Well-Known Member
Polaris made changes to C to C,belt,gear ratio's(especially the pro s),primary sheave degree and chaincase C to C for axys models.
The C to C on clutches and chaincase is all ok.
Why the change in primary sheave degree from 28 dual to 27 straight?? To get were I'm going with this. The new 27 degree primary sheaves up shifts quicker then the 28 dual degree. Doo uses 26 degree to I believe.So polaris created a quicker up shifting primary by changing the angle, but keeps the same profile weights and then add's a 1.61 ratio to all pro s models???? This is were I see the trouble.
Having the newer 27 straight degree primary and the 10 series weights with same profile used in the older 28 dual degree primaries doesn't seem like the perfect fit to me. If your creating a quicker up shift by changing angle, then a new profile of weight should be made to keep proper pinch on belt as I see it. The 10 series probably can't keep the same belt pinch with the 28 degree to 27 degree.In order to do this a more aggressive profile weight could be made or using adjustable's with more weight in the mid and tip. This would keep more pressure on the belt(pinch) because of the quicker up shifting 27 degree.
Add the 1.61 ratio to this, which is geared way to tall, and the light weights that come stock, I see belt slippage all the time. This to me is, the biggest problem with guys complaining about RPM loss or fade.
To remedy this, I have added 4 gram heavier weights (heavier tip weight)for better belt pinch and geared all the pro s's 1.73 and 1.74 ratio's. This seems to be working better then factory set up. Fine tune it with a primary spring that works in the RPM range and it reacts better as I've seen.
This is all done around 1000' above sea level.
This is just a thought.
To light of primary weight's(reving to the moon) creates heat and slippage causing belt residue. This causes belt slippage and tons of heat in primary. Add some weight to the primary(2 to 4 grams) to pinch the belt better. Break in these expensive belts easy and wash after.This has had a positive effect doing this.
The C to C on clutches and chaincase is all ok.
Why the change in primary sheave degree from 28 dual to 27 straight?? To get were I'm going with this. The new 27 degree primary sheaves up shifts quicker then the 28 dual degree. Doo uses 26 degree to I believe.So polaris created a quicker up shifting primary by changing the angle, but keeps the same profile weights and then add's a 1.61 ratio to all pro s models???? This is were I see the trouble.
Having the newer 27 straight degree primary and the 10 series weights with same profile used in the older 28 dual degree primaries doesn't seem like the perfect fit to me. If your creating a quicker up shift by changing angle, then a new profile of weight should be made to keep proper pinch on belt as I see it. The 10 series probably can't keep the same belt pinch with the 28 degree to 27 degree.In order to do this a more aggressive profile weight could be made or using adjustable's with more weight in the mid and tip. This would keep more pressure on the belt(pinch) because of the quicker up shifting 27 degree.
Add the 1.61 ratio to this, which is geared way to tall, and the light weights that come stock, I see belt slippage all the time. This to me is, the biggest problem with guys complaining about RPM loss or fade.
To remedy this, I have added 4 gram heavier weights (heavier tip weight)for better belt pinch and geared all the pro s's 1.73 and 1.74 ratio's. This seems to be working better then factory set up. Fine tune it with a primary spring that works in the RPM range and it reacts better as I've seen.
This is all done around 1000' above sea level.
This is just a thought.
To light of primary weight's(reving to the moon) creates heat and slippage causing belt residue. This causes belt slippage and tons of heat in primary. Add some weight to the primary(2 to 4 grams) to pinch the belt better. Break in these expensive belts easy and wash after.This has had a positive effect doing this.
