jbones Posted November 23, 2008 Author Report Share Posted November 23, 2008 thanks for info, i have not had a chance to do a compression test yet.but it runs good at zero and i probly should leave it unlone before i break something. Quote Link to comment Share on other sites More sharing options...
2001Stroker Posted November 23, 2008 Report Share Posted November 23, 2008 It's not going to hurt anything to advance it. I'm just trying to make sure that you don't advance it too far. Set it at +2, and see how you like it. You ain't gonna hurt anything set that low. Quote Link to comment Share on other sites More sharing options...
jbones Posted November 23, 2008 Author Report Share Posted November 23, 2008 It's not going to hurt anything to advance it. I'm just trying to make sure that you don't advance it too far. Set it at +2, and see how you like it. You ain't gonna hurt anything set that low. thank again for info, its been below freezing all week up in MA, so i have not gone riding. next time i will try +2 and let you know how it ran. Quote Link to comment Share on other sites More sharing options...
deckheight Posted November 23, 2008 Report Share Posted November 23, 2008 If the head that 87 came with is still on it... Your not even close to having a problem w/+4 ignition advance even with .015 faced off it. See if the head casting says 2GUY-1??? If it does, get a get a newer model 2GUY-2 casting. Just that swap alone will give you a slight power increase. Then if you want more power send the new head to someone competent and have it cut for whatever octane fuel you want. Then you can start thinking about detonating... Or just avoid all the drama, get an aftermarket head shell w/20cc domes, advance the ignition a couple deg. and be done with it... I have 87 banshee .015 off the head rad vavle toomy pipes k&n filter no lid on box 3/8 reed spacer boost bottle stock carbs 270 main jet run 32.1 pump gas ricky stator adjustable timing plate set at zero what could i do with timing to get a little more power ? Quote Link to comment Share on other sites More sharing options...
T_Shee Posted November 23, 2008 Report Share Posted November 23, 2008 We need to know what PSI are in the cylinders. Did you put a guage on it yet? Your compression ratio and timing dictate what octane fuel you need. Octane is only a number for rating when the gas will spark-knock. Gas is not rated Good, Better, Best. Find out what the compression is, and get back with us. as i said 130 pisi on both cylinders Quote Link to comment Share on other sites More sharing options...
kawiking Posted November 23, 2008 Report Share Posted November 23, 2008 if the plugs back out... ur timings to high !! set it on +4 i had +4 timing ,130 ish comp, .030 shaved head and i rab 50/50 i used vp c-12 108 octane Quote Link to comment Share on other sites More sharing options...
jbones Posted December 7, 2008 Author Report Share Posted December 7, 2008 It's not going to hurt anything to advance it. I'm just trying to make sure that you don't advance it too far. Set it at +2, and see how you like it. You ain't gonna hurt anything set that low. I tryed +2 and ran good on pump gas with a little octane booster . i`m going leave it there it ran good,and i beat a 250r 3 times straight with no problem. thank again for all the info. Quote Link to comment Share on other sites More sharing options...
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