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Yz295 build

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I just got my more better yz295 kit back . What are you guys running for gear ratios and jet sizes? I will be using it for Mx in the sand.

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I just got my more better yz295 kit back . What are you guys running for gear ratios and jet sizes? I will be using it for Mx in the sand.

 

The jetting is quite different from bike to bike. Mine I had go down on the pilot and up the main which is contrary to what others have done.....sorry I can't help there.

 

Sand will put a bigger load on the bike but it should safely pull a 14t front and 48 or 49t rear with the additional pow. May I suggest you wire your grips really well because it will pull like a mule....no joke either. One hare scramble I did the grips were all twisted unevenly. Very rarely do I get any insterested in riding it either....one time is plenty for most :jawdrop:        

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Go to yamaha.motor.com and order wheel/pinion gears from the 98 WR 400..(with 14/48) Best decision I ever made on my big bore YZ.. Its about 300.00 or so for the parts and an afternoon splitting cases.. TOTALLY worth it.. Good luck..

 

Edit: I only did 3-5 gears as a full 1-5 set requires some case work for the 1st gear to spin freely..  As above on jetting, I ended up leaner on my pilot and richer on my main but again, all bike are different.. Climate, ride style, exhaust, intake etc etc..

Edited by bikedude127

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Check your squish clearance. You cannot assume EG made it right for your motor. Aim for 1.60mm.  Then jet it.

 

My mo betta 295:

Sea level. Moderate temps. Fatty exhaust. Stock (EU long) muffler.  1.60mm squish.  About 45:1 TTS oil mix. 245 psi with new rings. Aus 98 fuel.

My motor rips with P=45, slide=8, needle=W on mid clip (3), main = 172.

 

I adjust the timing for the type of riding. Near stock for an insane wide mid range burst, or retarded a lot for less aggressive and super broad power for trails or bad traction conditions.

 

With a 48 pilot the initial roll on power is more gentle, but more spooge. 45 way more initial power.

With the stock 7 slide there was an annoying rich burble at 1/8th throttle.

With the needle on clip 2 (stock and leaner) I had hesitation then an abrupt difficult power surge.

With a 175 main it is slightly rough when tapped out side open, and much less wide open power than the 172.

Edited by numroe

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