Overboost Posted March 30, 2009 Report Posted March 30, 2009 quick general question about compression.. when motor is running, right pipe has a nice loud pop to it, puffs some smoke and sounds good. left pipe dont smoke at all, and has no pop to it, just a bit of air puffing out. without doing an actual compression check, is my left cylinder going out? runs excellent, and really didnt notice it until sat night. head is stock. if it needs rings, do you just pop off the jugs and change rings? enough to get my by until winter, at which time I will probly go forged pistons, cool head, port, domes and FAST clutch. thanx for the input. Quote
jbooker82 Posted March 30, 2009 Report Posted March 30, 2009 Your carbs could be out of sync. So the dead cylinder isnt running to its full potential causing it to sound weak. josh Quote
Overboost Posted March 30, 2009 Author Report Posted March 30, 2009 carb sync is dead nuts on. got that perfect when I jetted it and reinstalled carbs. sync is good through little windows and looking down carb throats. Quote
bansheefreak Posted March 30, 2009 Report Posted March 30, 2009 did you install the choke tube??? maybe bad plug??? bunch of diff things could cause this not just a dead cyl... Quote
2003LimitedBanshee Posted March 30, 2009 Report Posted March 30, 2009 carb sync is dead nuts on. got that perfect when I jetted it and reinstalled carbs. sync is good through little windows and looking down carb throats. Not to discredit you, but, IMO about the only way to synch carbs without the flow through meter is by touch. Actually have the filters off, and feeling with the same hand when the slides first move. This still isn't quite as perfect as the acutal meter, but I got mine REAL close by feel; I just don't think you could see those very first minimal movements. But just my $.02 Is this when you first warm it up, or all the time? Another thing to check, that mostly only applies when fuel is lower, one carb, can't remember now which one, does not get as good of flow from the T in the gas line. When I first bought mine, you could actually see the hoses were slanted at the T, biased towards one carb. If you're flowing a full fuel line, you wouldn't notice though until in theory you emptied the bowls or were low in the tank. Quote
Overboost Posted March 30, 2009 Author Report Posted March 30, 2009 choke tube is a go, plugs are older, will change them out. starts up stone cold 3rd kick, warmed up, first one no choke. Quote
Overboost Posted March 30, 2009 Author Report Posted March 30, 2009 got the carbs synced as close as I can by eyeball, slightest touch of the throttle and they both move. the tank is down a bit, less than a gallon, just have enough in for starting and tuning until I get ready to take off, then fill it. it only seems to do it mostly when its cold until it warms up around 140 degrees, then they both seem to be even, thats why I thought rings, rings get hot, expand, give my full compression. am going to try some new plugs when I take it out, so I can buy a few sets, to tune it up, get the jetting dead on. guess I will get a compression tester if I cant figure it out, just to be sure. it runs great, just bothers me knowing they are uneven. outside of that, rips ass pretty good. Quote
wacko2000 Posted March 31, 2009 Report Posted March 31, 2009 My opinion do a compression test and then go from there. Process of elimination bro, If you have the compression you are supposed to have in both cylinders then you kno to looks elsewhere. carbs etc..... Quote
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