Jetting a TRX90

[Pappy]

Big Gun race series....stock engine. Whats everyone running for jetting?

[212racing]

if you go with a uni filter then i would say a 83 jet, that will get you close then you can click the needle up or down to fine tune

[AtvMxRider]

If I'm not mistaken Ken we are running a 90. We have a R4 with a K&N and open air box.

[Pappy]

after a few laps the stock jetting seems fine. plug is dark and no popping

[212racing]

i think the 90 would be to rich, we run a fuel pump,big cam, 89cc,a lot of compression,etc..... and now just jetted to a 90, but each area is different,altitude,temp,barometer,etc... when we had the set-up you have it was a 83 or 85, i dont know what the other guy is running so i am not saying he is wrong. just telling you what we had run.

[AtvMxRider]

Originally posted by 212racing
i think the 90 would be to rich, we run a fuel pump,big cam, 89cc,a lot of compression,etc..... and now just jetted to a 90, but each area is different,altitude,temp,barometer,etc... when we had the set-up you have it was a 83 or 85, i dont know what the other guy is running so i am not saying he is wrong. just telling you what we had run.

It's either an 85 or a 90 I can't remember.

[Sportrax90A]

How do you change the jetting to a specific #?