yamahakid1 Posted August 6, 2006 Report Share Posted August 6, 2006 Im pretty sure my plugs are just fouled which is making it hard to start but since I got my head milled and cylinders bored over a little should I mess with my air screw? It will start easily if you take off the filter and pour a little gas into the carbs. After you get it started though it starts first kick every time, so Im guessing I jsut need to adjsut the screw am I right or is it just because my plugs are fouled which they kinda look like they are. Quote Link to comment Share on other sites More sharing options...
sredish Posted August 6, 2006 Report Share Posted August 6, 2006 Im pretty sure my plugs are just fouled which is making it hard to start but since I got my head milled and cylinders bored over a little should I mess with my air screw? It will start easily if you take off the filter and pour a little gas into the carbs. After you get it started though it starts first kick every time, so Im guessing I jsut need to adjsut the screw am I right or is it just because my plugs are fouled which they kinda look like they are. put in new plugs and pull the choke. what are your mods, and what jets are u running Quote Link to comment Share on other sites More sharing options...
yamahakid1 Posted August 6, 2006 Author Report Share Posted August 6, 2006 put in new plugs and pull the choke. what are your mods, and what jets are u running pro circuit pipes mild port and polish, advanced timing, milled head, open air box, im running 310 jets at sea level with stock pilots and needle on 3rd clip or 4th i cant remember but the needle doesnt have to do with start up. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 6, 2006 Report Share Posted August 6, 2006 If you ONLY had the head milled and cylinders bored it shouldn't require major jetting changes, if any... That's if it was jetted correctly before this work. Stock pilots should work fine. 310s may be a little rich, but that's not gonna effect your starting. Is the choke tube in place between carbs, and...how old is the gas in the tank and carbs? I agree with Sred...replace the spark plugs, too. Quote Link to comment Share on other sites More sharing options...
sredish Posted August 6, 2006 Report Share Posted August 6, 2006 you didn't say your pilot. i'd try a 27.5 and a 30 as well to see if it gets any better. rule of thumb on pilot jet: when the motor is cold, if you can start it w/o the choke, it's rich. it's normal to need to use the choke on a cold motor. when the motor is hot, if you need the choke to start it, it's too lean, you shouldn't need the choke to start a warmed motor. Quote Link to comment Share on other sites More sharing options...
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