OK i will start by saying i just had my heads cut a reshaped now the specs the technician told me is im at 14:1 on the compression chart now set up for 0-2000 ft at about 0-20 degrees where should i start the jets at i know im going to have to fatten them up considerably but how much right now im at 330 mains and lowerd the needles down a notch so they are in the middle and i am running 112 octane,so,i think im going to go to 350 mains and deal with the needle as i go,this is on a 99 zr 700

14:1 on a trail engine? and 112 octane fuel to boot(by the way, what brand fuel are you running?) * you will have to richen it up a little, just keep checking the plugs and piston wash. *If you plan on doing anymore mods(one thing leads to another :-) * you should look into getting something to monitor EGT's. *It is hard to burn down an engine on race fuel, but it can be done. * anyway, make sure you take down a few doo's with your cat