oK I JUST GOT 22 IN REAR TIRES ON MY YFZ450, and i still have the stock 21 front tires, i was wondering if i should get 23 inch front tires or 22? you tell me

 

Well, I imagine that it will change the steering, becasue the front is now lower than the back....kind of like steepening the head angle on a bicycle or motorcycle.

The YFZ is a light little sport quad, and it deserves light little tires!

I have at times run Holeshot XCT's (23" front/22" rear) on my 400 and 450R for a little more ground clearance, but always eventually went back to the Holeshot XC's (22" front/20" rear).

 

do the 22in give you a lil more topend?

 

Yes you should bump up the size of the front..... As recon said you have changed the steering angle which will affect several aspects of the handling.....I am also in agreement with him that the 20" rears always end up calling most people back because of the superior handling.....I'm not a big fan of running 22" on any of the new sport machines but some guys like it in the woods. I always find that the extra bit of clearance never makes up for the handling change.....but if you set up the entire quad for bigger tires all around including the suspension it is probably better......

I would say you should run 23/22 at the very least......

 

<div class="FTQUOTE"><begin quote>Originally posted by: hummer93516

do the 22in give you a lil more topend?</end quote></div>

The simple and inexpensive way to get more top end, will be with a gearing change!!!

 

well, whats a good gearing change? like in the sprockets, 1 up in the front, and down one in the back? or just one up in front?

 

Find what ratio you have now, and see which changes will give you what new ratios:

http://pinnedoutracing.com/gearratiochart.aspx


For more top end, go bigger in front or smaller in back. Remember, 1 tooth in front = 3 teeth in back.

 

I run 23's up front, 20's in back. Making the whole quad lean back sets the caster back and makes the wheels track straight, but also makes turning tougher. Not why I did it though.... I wanted to fly over big rocks on the trail and be more confident blasting down hills without worrying so much about flying over the handlebars. For me, this setup is perfect.

My advice on sprockets is to always make both of them as small as you can for your intended gear ratio. For instance, if I liked a 13/39, I would try to find a 12/36 or 11/33. They're all the same ratio, but there is less chain and less chain weight. Plus, the smaller front sprocket makes chain weight and friction less meaningful to the engine. You just have to trust me on this because there is no way I'm getting into the math again, lol. I've already done this on the physics boards and over at thumpertalk.

 

And of course, when you gain top end speed, you will also be giving up low end torque and acceleration! Everything is a trade-off....