Okay we have them. It is way shorter than the Phazer belts and the 8DN. This means the Center to Center Must either be less on the Viper or the clutches are different dia. Which is it? What do you all think? Makes me very nervous I will admit. I will get measurements tonight but it is very obvious length is alot shorter.
Why does this make you nervous, Cannondale? Are you thinking the clutches are a new design (thus the shorter belt) or is it the center-to-center distance that concerns you? If the latter, why?
2lapsdown
Expert
You really need to have a beer and relax. Your gonna have a flippin stroke before you ever get to ride the dang thing!cannondale27 said:
stingray719
TY 4 Stroke God
cannondale27 said:
When I looked the prototype over closely it appeared that the Nytro engine was set down in and back, using a shorter belt because clutches seemed close. As I did not actually measure it though that is a guess.
It makes me nervous because the shorter the belt the more it has to bend. That will create more heat/stress there is no way around that fact. The Center to Center of Yamahas. All of them. Has been the same since the 90's. It works and is proven. That means all the belts are very close in length for all those years. Just very small differences. Why change what works well? I do trust Yamaha but not 100%. No measurement yet but here is a pic. Viper on bottom.
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09nytro
TY 4 Stroke God
I really don't think that will make any difference it's not that much smaller
Nytro40th
TY 4 Stroke God
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not worried
baggs66
VIP Member
You can see the clutches are closer so the belt will be shorter what would bother me is them telling you what a great deal the belt is only $100 not bad only went up $35-40.
sleddingfarmer
TY 4 Stroke God
Yeah, I'd Be Disappointed That I Can't Buy 65 Dollar Belts Anymore.
Look At The Bright Side.... Less Weight!
Look At The Bright Side.... Less Weight!
2lapsdown
Expert
If you want they could mount the motor even higher in the chassis, and you could get your 90's belt. Yamaha did not pick the center to center. The world has changed. Relax, it's going to be fine!cannondale27 said:
We will see. Would like some of the clutch tuning guys opinions on this though. If it is fine tell me why? I can tell you that it is a proven fact the past belt length and c/c of Yamahas worked. Maybe need to try getting ahold of Aaen.
sleddingfarmer
TY 4 Stroke God
Its Gonna Be Fine Because Its Still Yamaha Clutches And Only a 135-Ish Horsepower Sled
Judging By Your Picture, The Belt Is Only A Little Shorter....Not Half The Length.
Don't Assume The Worst! Put A Little Venting On The Side Panel And That'll Cure Any Heat Issues Caused By The Slightly Shorter Center To Center.
Judging By Your Picture, The Belt Is Only A Little Shorter....Not Half The Length.
Don't Assume The Worst! Put A Little Venting On The Side Panel And That'll Cure Any Heat Issues Caused By The Slightly Shorter Center To Center.
09nytro
TY 4 Stroke God
Why would the shorter center to center cause more heat ?....if the clutches are set up right they both should be the same temp.
So the center to center and shorter belt has nothing to do with the heat in the clutches it would be belt slipping so then you would have to adjust the clutches
So the center to center and shorter belt has nothing to do with the heat in the clutches it would be belt slipping so then you would have to adjust the clutches
It creates more heat because a shorter belt has to bend more. Doesnt seem like much but at 8000 rpm a little more bending can be alot of heat. But what do I know.
Handy
Expert
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Ok, I have decided to chime in. Shorter belt does not bend more than a long belt. The amount of bend is determined by the diameter of the clutches. The belt could be three feet longer and the amount of bending will still be the same. The bending is done by the size of the radius. Smaller radius more bend, larger radius less bend.
