gbody Posted July 15, 2009 Report Share Posted July 15, 2009 Has any one ever had a problem with the cool head and spark plugs coming lose and fallin out . Its like all of sudden this has been happening no matter how tight I get it . after 30- 40 minutes sometimes less the spark plug just gets lose and falls out. I don t understand are the threads worn out or wat Im at a total loss . Its the left side if you were sitting on the bike . Quote Link to comment Share on other sites More sharing options...
KaosBanshee44 Posted July 15, 2009 Report Share Posted July 15, 2009 It's not the cool head that's the problem it's the domes that are inside the head. Did you tighten the spark plugs to much at one point? Quote Link to comment Share on other sites More sharing options...
gbody Posted July 15, 2009 Author Report Share Posted July 15, 2009 No thats wat I thought might have happen but the threads are okay there not striped it still tightens down like regular + forgot to mention the other side did it first re tightened and never had another problem again with the right side but now the left just keeps coming out Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted July 15, 2009 Report Share Posted July 15, 2009 Haven't experienced it myself, believe I've seen on here that it's a sign of pre-detonation. Maybe do search on it, or wait for other replys before riding. My .02. Quote Link to comment Share on other sites More sharing options...
Tedder Posted July 15, 2009 Report Share Posted July 15, 2009 Being an asphalt racer I've never run long enough to actually have a plug fall out but detonation will sure loosen them up. Only seen it happen with alcohol. That pounding is real hard on parts. Quote Link to comment Share on other sites More sharing options...
gbody Posted July 15, 2009 Author Report Share Posted July 15, 2009 I was talking to one of these bike shops down here and they told me not to use gasoline with enthonal in it said it would burn out my pistons and cause detonation. But every body down here sells gas with enthenal . Has anyone else heard of this . + im thinking of buy another set of plugs may be I got a bad set or something because it didn t do this before until I put these plugs in it, now that I think of it. Quote Link to comment Share on other sites More sharing options...
Tedder Posted July 15, 2009 Report Share Posted July 15, 2009 (edited) I was talking to one of these bike shops down here and they told me not to use gasoline with enthonal in it said it would burn out my pistons and cause detonation. But every body down here sells gas with enthenal . Has anyone else heard of this . + im thinking of buy another set of plugs may be I got a bad set or something because it didn t do this before until I put these plugs in it, now that I think of it. I really doubt it's a problem with the new plugs. We race with a motorcycle guy (track champion more than once) that runs ethanol. He told me that he had to jet up when he made the switch from straight gas and again when he went to a higher concentration. IMO your running into a lean condition and thats likely whats rattling the plugs loose. Without knowing your whole setup but assuming this bike has been fine in the past I'd jet up 2 and see what happens. Good luck. Edited July 15, 2009 by Tedder Quote Link to comment Share on other sites More sharing options...
gbody Posted July 15, 2009 Author Report Share Posted July 15, 2009 Thanks for the advice ill try that out today you may be right on that one because lately on some cold nights it seems like it bogs in the upper rpms or even with an extra ridder it bogs but when i ride alone it seems to run fine and the plugs seem to take a little longer to back out may be Im running on the lean side and it is detonating in the higher rpms you may be on to something, Thanks . :thumbsup: Quote Link to comment Share on other sites More sharing options...
blowit Posted July 15, 2009 Report Share Posted July 15, 2009 Thanks for the advice ill try that out today you may be right on that one because lately on some cold nights it seems like it bogs in the upper rpms or even with an extra ridder it bogs but when i ride alone it seems to run fine and the plugs seem to take a little longer to back out may be Im running on the lean side and it is detonating in the higher rpms you may be on to something, Thanks . :thumbsup: Ethanol will certainly not damage your engine if run correctly. The higher the Ethanol content, the bigger your jetting needs to be though so find a blend, tune for it, and stay with it. Yes, the lean condition vary well could be causing your issues. B Quote Link to comment Share on other sites More sharing options...
slopoke Posted July 16, 2009 Report Share Posted July 16, 2009 Ethanol will certainly not damage your engine if run correctly. The higher the Ethanol content, the bigger your jetting needs to be though so find a blend, tune for it, and stay with it. Yes, the lean condition vary well could be causing your issues. B Mine did the same thing. I was running pump gas and it had preignition causing the plugs to come loose. Started running av gas and problem went away. Maybe back you timing off a little if you have it advanced. Quote Link to comment Share on other sites More sharing options...
No Limit Powersports Posted July 16, 2009 Report Share Posted July 16, 2009 Give us some more info on your bike. Plugs rattling out is caused by detonation not by faulty plugs or domes 99.9% of the time. Whats your compression, timing, carb setup, jetting. Sounds like to me your either lean or have to much compression/timing for the fuel you are running. Quote Link to comment Share on other sites More sharing options...
gbody Posted July 16, 2009 Author Report Share Posted July 16, 2009 0ft above sea level 160psi of comp. full drag ported and polished, stock stroke, cpi's, stock carbs 390 / 30 pilots, I have to check on the timing can't remmember if advanced or not . I run 93 octane , see the thing is i built the bike had it tuned then put it in storage for about 2.5 years then a couple months ago I took it out and got it running first couple rides no problem . then the plug thing started. But it may be running little lean because when I tuned 2.5 years ago they weren t using that ethenal crap Ive even had problems with my boat after that $hit came out . Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 16, 2009 Report Share Posted July 16, 2009 Once the compression ring on a spark plug is compressed the first time, you should only have to turn the plug 1/4 turn once it makes contact with the dome. 160 cranking PSI isn't too bad, I would definately be checking the timing, maybe even pull the flywheel off to make sure it doesn't have a degree key on top of the timing plate (hey, we used to mod stockers AND put a degree key in before the timing plates were around...or we were too cheap to buy one...lol) I'd like to know the compression ratio as well. It could be sky high but due to the exhaust port being raised a bunch, it might not get that high on cranking compression. Also, what is your squish at? checked for air leaks? Full drag port, CPI pipes but STOCK carbs???? Possible those carbs aren't getting it the fuel it needs...or the small carbs/carb bowls are running out of fuel as well. Quote Link to comment Share on other sites More sharing options...
No Limit Powersports Posted July 16, 2009 Report Share Posted July 16, 2009 Sounds high to me but really depends on timing. I would try some 50/50 mix or av gas and see if the problem goes away. Quote Link to comment Share on other sites More sharing options...
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