[AC]

I'd like to gear my 96 mxz 670 to 25/44, it's 26/44 right now and I can't seem to go more than 102 mph and clutch is not fully open. Anyone know the # for 25 narrow gear? I have the racing manual and there are some "Powder" and "steel" sprockets and I'm not sure about the difference.

 

[permafrost]

I am no gearing expert, but wouldn't you want to put in a taller top gear like a 27 tooth, for more top end?

 

[AC]

permafrost, I think the motor can't pull the gearing I have and it does not allow the primary to close completly so I loose at top end. I've put in a full lug 1.18 track and ever since I did that, I lost some top end. I'm trying to regain by gearing down, 25/44 max mph is 116 and 26/44 is 120 so gearing down would give more power at top enabling the clutch to fully close and to gain some top end. Hope this makes sense  

 

[ballsout1]

Your on track, just look for 13 plate wide gears, get aftermarket, around 20 bucks, also personally, I would drop down two but I dont know if  2 would still be better on top, are you sure your speed is correct now? Dont trust the speedo too much you should be able to get around 107 to 110 out of it.

 

[AC]

Speed is accurate, I checked with GPS. No need to go for aftermarket, my brother works at a dealership and gets good discounts

I'm just curious about powder vs steel gears.

 

[kid rocker]

ballsout1 is 100% correct, I would go down 1 tooth at a time.  And if you have the extra money, go down 1 more tooth on top.  Test with the 25 first, mark your clutches, if you still have 1/2 inch of marker showing, go down 1 more tooth to a 24.   I am running a 24-43 on my 2000 MXZ with the paddle track and it stays about the same on topend.

 

[Sharkey]

The 43 bottom new style gear is also lighter, than 44 tooth old stlye.