Brock
Well-Known Member
Bringing up an old thread........
I just want to say about belt glazing. I'm talking about stock Polaris belts. It's a known problem as the belts have different and inconsistent compounds from one belt to the next. Polaris knows about this and is trying to remedy this. If you have a Polaris belt that's glazed and shiny and it seems your down on rpm. It will slip through the shift but shows mostly in last quarter(top end). This is were it suffers and will lose rpm, and might gain it back and fall again. It's a main reason in rpm loss (or this inaccurate term fade).
The problem is, the glazed over belt can't hold side pressure in primary up in top rpm, tons of heat, slippage and inconsistency.
One remedy is scuff the belt and clutches good and clean. Add tip weight (0.5 grams), check springs and try.
Or get a gates, or Carlisle belts.
Most of this rpm loss is in the cvt system.
Applying proper springs in primary and secondary does help along with clean clutches and a good washed belt.
The secondary needs enough initial load at the start to hold and is better to help back shift always. I like a 140 lbs start for initial load on secondary.
Also since the primary is a straight 27degree that upshifts quicker then the dual angle on Indy and pro r models. This can make a belt slip even more to compound and double the slippage with a glazed belt. Faster shifting primary with glazed belt = rpm loss.
Gearing lower helps this too. Get the 1.61 out and try a 1.68-1.74 ratio. This will be more consistent in all clutch ranges.
Just something to think about again.
I just want to say about belt glazing. I'm talking about stock Polaris belts. It's a known problem as the belts have different and inconsistent compounds from one belt to the next. Polaris knows about this and is trying to remedy this. If you have a Polaris belt that's glazed and shiny and it seems your down on rpm. It will slip through the shift but shows mostly in last quarter(top end). This is were it suffers and will lose rpm, and might gain it back and fall again. It's a main reason in rpm loss (or this inaccurate term fade).
The problem is, the glazed over belt can't hold side pressure in primary up in top rpm, tons of heat, slippage and inconsistency.
One remedy is scuff the belt and clutches good and clean. Add tip weight (0.5 grams), check springs and try.
Or get a gates, or Carlisle belts.
Most of this rpm loss is in the cvt system.
Applying proper springs in primary and secondary does help along with clean clutches and a good washed belt.
The secondary needs enough initial load at the start to hold and is better to help back shift always. I like a 140 lbs start for initial load on secondary.
Also since the primary is a straight 27degree that upshifts quicker then the dual angle on Indy and pro r models. This can make a belt slip even more to compound and double the slippage with a glazed belt. Faster shifting primary with glazed belt = rpm loss.
Gearing lower helps this too. Get the 1.61 out and try a 1.68-1.74 ratio. This will be more consistent in all clutch ranges.
Just something to think about again.
