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
Jetting for head mods.
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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
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 cat1 - 2 of 2 Posts
