21/38 gearing on extended Apex

[copo427ss]

I thought the stock rtx would hit 112 with the 22/38. I had 23/38 and dropped one tooth when I switched to my 1.5 track. My clutching stayed the same shift out at 10900 and stays at 10700 after

 

[grader]

it will probably run better when its cold out. you can also do a fuel adjustment on the apex that adjusts low rpm running. you said your pipe to the muffler is too small, so definitly get that fixed first as restricting the exhaust from stock it bad.

 

[Maurizio Benelli]

Can't remember how warm it was, but most certainly warmer than winter. Maybe about 70 fahrenheit.
I'll get that pipe fixed and then I know better.