If the stock sprocket is 14 front and 37 rear, what changes can I expect from changing to a 13/38 setup? I ride mostly in the mountains and would like more low end torque. Is this what I would get with the change? Thanks!
That is exactly what you will get. I ride some pretty rocky mountain trails, and the stock gearing was no good. It was real hard on the machine, and me as well. I went with a 13/39 combo. It's just right for me.You could even try a 13/40 if it suited you. The lower gear combo will definitely help climbing rocks and hills. I also put on ITP Blackwaters on the back to help with traction. I even put 23 inch tires on the front, for a little more clearance. I am very happy with this set up.
There are some good sprocket companies on line. Personally, I recommend a hi tool steel one from sidewinder. A little more expensive, but they are very durable. I've used the chain lube they will try to get you to buy. It does leave a little bit of a waxy buildup. I'm not sure I'll buy it again.
I used to run 13/38 and now run 13/39, and either will work well for you on the trails. I went up to the 39 for use in the sand. I recently rode with this setup on the trails, and it worked well, but I feel like I've lost quite a bit of top end for fast riding, so I think 13/38 would be just about ideal.
i've been playing around with different ratios and have found that the 13-40 combo is too low. 13-38 would be much better, had a stock z400 waste me going up hills and dunes because i just couldn't get enough wheels speed with 13-40. for me 13-37 or 14-40 both work great, they are almost the same ratio - james
Had a Sidwinder 13 and it wore in one spot pretty quick. One side was good but the other was worn. Don't know what that means but I went to 18' tires so went from 13/38 to 14/38. That is a good ratio. equivalent to 13/39 on 20's. 18's on the predator are sweet so I don't think I'll go back to the small front sprocket. I have a Vortex ignition which does let it rev out better which is important when you start gearing it down. I am curious to hear from people who have installed higher rev springs.......Even if it is some 18X11X10's Holeshots on steel rims everyone should have a set, they have better traction and allow much more speed in the corners. Good Luck!
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