Rebuilding my carb and there are two choices for the main jet size......108 & 110 I have two books and they both say different things. The engine has a 10.5 to 1 .020 over piston and the head is ported. I plan on running 100+ octaine...........can any one give me an idea and why.

 

oh yea......I ride from 600 to 1000 ft above sea level

 

Hey "KNOWSALOT" ........where is your insite??[img]i/expressions/face-icon-small-smile.gif[/img]

 

on my 200x my head is ported and I have a pipe. I run a 108 and its perfect. about 500ft, but when it startes to get colder I go up to 110. If I were you I would just start at 110 and if its rich go switch it back.