This was posted by another rider. I'd like some thoughts on it from some experts. I just put this sprocket on my Predator, and I'm curious as to whether he is right.

the 13 tooth sprocket isn't an exact match. besides a 13 tooth doesn't give the right turning radius. it actually wants to rip the back
aqxle forward instead of turning it. the right solution is a 40 or 41 with a 14 tooth counter sprocket. the predator needs the larger counter

Well??

Scott

 

Well I have a 13 on mine and it feels great. There are also a lot of other Predator owners who have them too, and I have not heard any of them complain. There are also a lot of Z and Raptor owners who have 13 on there atvs. My brother has a 13 on his Z and loves it. I can't see it being a problem. When I put the 13 on, it wasn't much smaller then the stock one, so I can't see how it would hurt it.

 

I don't agree, here's what I think is going on...

The only difference in the smaller front sprocket is the angle of the chain, therefore its possible the chain will wear the teeth on the smaller sprocket a tiny, miniscule bit different than it would wear the teeth on the 14 tooth. This would also happen if you kept the stock front sprocket and went with a larger back sprocket. It will take a larger jump in teeth on the back to make the diameter/angle change that would have the same effect as the single tooth smaller on the front, but it takes a larger jump to get the same gearing too.....

It's true that by changing the gearing, you are putting more strain on your chain, sprocket teeth, and other parts....the counter shaft is being turned by the engine and tranny gears with a certain torque. If you reduce the distance from the center of the counter shaft to the outer edge of the sprocket, then in order to transmit the same torque of the engine and tranny gears (hasn't changed without mods), the linear force tangent to the sprocket must increase, hence you feel more rear wheel power. The force is only felt in the part of the chain thats on top, and the force at the rear sprocket is transferred in the same way as with a larger front sprocket. The "ripping the back axle forward" effect is only due to the power difference, more torque over a shorter time. If you were able to completely lock up the axle so it wouldn't turn, and make your chain and teeth never break, and put infinite power to the chain, it would pull the axle and sprocket right out of there! Fortunately for us the axle does turn, the components are easily strong enough to handle the extra load, and we go faster! Just my opinion, could be wrong, but makes sense to me [img]i/expressions/face-icon-small-happy.gif[/img]

 

Good insight there 2mins, I'd have to agree with ya, I've had my 13 tooth on for awhile and no problems!!

 

Sounds good to me too. I've never heard anyone use the term "linear force tangent " in a sentence before. So you are either a very smart guy, or full of it. I'd like to think the former were true.

Thanks for the input...

Scott

 

I assume by linear force, you speaking of force as a vector quantity. I would be easier to say the force tangent to the point where the chain and sproket seperate. Just messin around [img]i/expressions/face-icon-small-smile.gif[/img]

 

for everyones info Sprocket specialist now have rear sprockets up to 40 tooth that will fit and clear the rear skid plate.