WR 5th gear in my YZ 426?

[ssuperbike]

I have heared of this being done. I have it apart and am getting ready to put it back together. I could use some more top end and could use a taller 5th gear, any one done this? I know it has been done, does it leave a huge gap? How about the lower first? Do I only need to buy the 5th gear and pinion? I love this bike and plan to keep it another year or two any input would be great. Thanks, ---Mike msg-law@msn.com

 

[techman]

You'll have to look up some really old posts to find the info, either here or at thumpertalk. One of the first guys was in Australia and I think he did 4/5 and maybe also 1st from the wr into his YZ. One day if it works out for you I may do 5th in mine for those road sections with the XR650's.

 

[KiwiBird]

Changing first requires the whole shaft and a gear, changing 5th is 2 gears. Works great, with the gaps not really a problem.

 

[NVR FNSH]

Check with Howard Huge in the WR400 forum at Thumpertalk. He fitted his YZ400 with WR gears (or whole tranny?) when he rebuilt it.

Brian

 

[ssuperbike]

Thanks guys! I am going to see if I can get the gears quickly or I will be putting it together stock. This thing has been apart forever and I want to go riding!!!! ---Mike

 

[techman]

When you get the real parts, installed, done and bugs out maybe you could post the part#s and any gotcha's you encountered in the procedure? It would be appreciated for reference sake if/when I do it.

 

[kciH]

This info would be greatly appreciated if you complete the mod.

 

[ssuperbike]

I did not do it. I can not wait to get it back together. I bet it still does 90 anyway. :eek: ---Mike

 

[kciH]

In another thread on here, Rich figured it will go 88.93 with fresh tread and stock gearing. It's my experience with my 01' that it will do that in a fairly big hurry. I'm intested in the WR gearing because I ride in the woods also. I'd take a WR first and fifth gear. You will never use those 2 on a motocross track.