Shee_Man Posted September 28, 2004 Report Posted September 28, 2004 (edited) Alright my mods are... PC pipes and silencers K&N V-force reeds NOS head 310 mains 30 pilots Problem is that it only idles on the right cylinder UNLESS I choke it a bit, then the left will idle and the right will smoke (due to the choke). So I thought clogged pilot... cleaned it out real well and still the same thing. Sometimes the left will fire though (warmed up) and it runs great when it hits powerband... sometimes it will bogg when the left isn't firing (comes and goes). Then I thought maybe a damaged reed... they were almost brand new... put them in a week ago but you never know... I could see light through the petals in a couple of areas, nothing major though at all (probably like that when I bought them brand new... just incase I switched the left cylinder reeds with the right cylinder.... problem was still there though, so it's not the reeds. The fact that when I choke it, it idles well on the left and is rich on the right (and the pilot is not clogged) makes me think air leak maybe... visually I don't see anything, tried carb cleaner and didn't see a difference (but hardly noticed a difference when I spray my filter with it too). Also if it was an airleak... wouldn't it be more constant... in other words not "coming and going" hot or not.. also wouldn't run well when i'm riding it hard... plus the plug looks perfectly jetted... may do a plug chop in case though... see what you guys think first... if so, where should I look for an airleak? All the above mods were done same time... NOSS head maybe? Choke tube is in place. Spark plugs are new. TORS removed... however not by me... but could it be a TORS problem? I've switched plug wires from left to right as well and no differnece. The fact that when I choke it, it runs seems to be my biggest clue at the moment... Sorry for the long post, lol... just want to get all the facts out there so I don't waste anyones time. Edited September 28, 2004 by Shee_Man Quote
Oilsmoke Posted September 28, 2004 Report Posted September 28, 2004 Carb sync, than set your idle screws. try adjusting right side higher just to see if that's it. Is the right side pipe cold? Quote
Shee_Man Posted September 28, 2004 Author Report Posted September 28, 2004 yeah, adjusted carb sync yesterday, forgot to mention that and have fiddled with the idle screws like mad. Since the choke makes it runs again... I wouldn't think it could be this... but I could be wrong... is this a normal symptom of bad sync or idle screws being wrong. Right side pipe will be warm and left side cold (since the cylinder isnt firing)... when I choke it though the left fires. Could it be a bad crank seal on the left side? If it's an air leak... what are the most popular places for it to be? What about a problem with my head... just installed the head and the problem could have been happening since then.... however it's weird that it goes away when I choke it. Is this normal for low compression maybe? buying a compression gauge tonight... but could it be due to low compression on the left side? Quote
ledofthezep Posted September 28, 2004 Report Posted September 28, 2004 Could it be a bad crank seal on the left side? If it's an air leak... what are the most popular places for it to be? 1st question: Is there a lot of oil in the pipe? 2nd: Usually along the intake boots. 1st thing I thought was choke tube...but you've already checked it...see any cracks? Lets see what your compression's looking like & go from there. Quote
Shee_Man Posted September 28, 2004 Author Report Posted September 28, 2004 by touching inside of each silencer... both sides are the same... if this is what you mean... if you mean inside the "pipe" by the exhaust outlets... I don't know and I haven't checked... but if this will solve anything I will... I just hate getting those springs on and off, lol. As for compression... hopefully I'll have it done by tomorrow... would it make sense that choking a low compression piston would make it run better than not... A/F should be good regardless of compression right? Or maybe at lower compressions, it will fire better if rich? Choke tube seems good... but i'll check it for a tight seal and any cracks in case... Quote
boonman Posted September 28, 2004 Report Posted September 28, 2004 Have you cleaned the carbs? SOunds like a clogged pilot jet. Quote
BenBB Posted September 29, 2004 Report Posted September 29, 2004 Just an idea, but is your idle speed really really low? Some people like it to barely spin at an idle, where it almost dies when you let off the throttle, I think that at that low of an RPM the stator can't produce enough voltage to fire both plugs. You might try increasing the idle speed (not like 5000 RPM but just a little higher than it is now, and don't forget to resync the carbs afterwards) and see what it does. Good luck. Quote
sheeweet Posted October 5, 2004 Report Posted October 5, 2004 What BenBB said! I tried to make it idle as low as I could one time and I had the same problem on the left side. Once I increased idle no more problem. Quote
Shee_Man Posted October 6, 2004 Author Report Posted October 6, 2004 I doubt it's that... but i'll try playing again with my idle screws. To have it idle as is now... my idle is set high (since only one cylinder is running) then if i pull the choke out a little it will rev to the moon since both cylinders start firing. Also it takes a while for my left side to start running also... I have to ride it for a good minute and then once it's in the powerband it will start firing and then it's pretty good... but will still cut out at lower RPM's. However with the choke the left side seems fine but the right goes rich... I guess I should ride it more and figure it out... but based on this could it be a crank seal... or would I have locked up my left side cylinder? I've checked my plugs and both look quite good, so I don't think i'm running too lean... and if it's running so lean that it doesn't fire sometimes wouldn't I blow up my piston in a matter of minutes? I've rode a good 2 hours like this now at least. Really can't get it figured out... thanks for the help though guys... won't be able to do it without you all. Keep the ideas coming. Quote
BenBB Posted October 14, 2004 Report Posted October 14, 2004 Did you ever check the compression? To me it sounds like an air/fuel issue, just by the way using the choke makes such a difference; if it was electrical or mechanical (compression, reeds, etc.) the choke likely wouldn't have such an effect... Since you already checked the pilots and for air leaks around the intakes, I would try a leak-down test and see if it's a crank seal, the left side could be sucking air intermittantly (hopefully if that's the case you still have good compression on both sides and no damage). Good luck. Quote
Capone Posted October 14, 2004 Report Posted October 14, 2004 (edited) Before you do all that, I got a bad plug from the factory when I went to flat river, tore the whole thing down cleaned put back together. Still misfiring and not firing at all, replaced plugs... ran perfect. Just incase its something small, you wont waste your time like I did. But if not as everyone else suggests sounds like a airleak to mE Edited October 14, 2004 by VitoBanshee Quote
zpolencheck Posted October 14, 2004 Report Posted October 14, 2004 I have been having similar problems with mine, I switched the slides, needles...etc... and the problem actually was gone!! don't exactly know how, but I did notice one of my needles was noticeably, yet slightly, different. I know it sounds like a one in a million thing, but it doesn't take long to switch them. good luck Quote
FIRST BANSHEE Posted October 16, 2004 Report Posted October 16, 2004 I had the same problem, My coil was bad. good luck Quote
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