SuperMex Posted March 12, 2011 Report Share Posted March 12, 2011 Bike is shutting down and sputtering on left cylinder, left side exhaust is weak I swapped plug wires and still same thing so coil is good. Put in new plugs still nothing checked compression 130 in both cylinders carbs are sync perfect and jetted exactly the same I'm at a loss some one have any idea wtf is going on or what to try ? Quote Link to comment Share on other sites More sharing options...
shee4speed Posted March 12, 2011 Report Share Posted March 12, 2011 (edited) you have good fuel to both carbs? 100% positive both carbs are clean? hmmmm float level good? Edited March 12, 2011 by shee4speed Quote Link to comment Share on other sites More sharing options...
bigblockbanshee Posted March 12, 2011 Report Share Posted March 12, 2011 Reeds? Bout the only thing you didn't mention... Quote Link to comment Share on other sites More sharing options...
sstaton1983 Posted March 12, 2011 Report Share Posted March 12, 2011 maybe left silencer is stopped up?try it with the silecer removed and see if it runs better. Quote Link to comment Share on other sites More sharing options...
SuperMex Posted March 12, 2011 Author Report Share Posted March 12, 2011 Pulled reeds there good, tool carbs completely apart there and blew them out there good, going to try silencer and see how that goes. Thanks for the replies fellas Quote Link to comment Share on other sites More sharing options...
wacko2000 Posted March 13, 2011 Report Share Posted March 13, 2011 Do you have a compression tester with you?? if not see if someone does or maybe the vendors are selling them. I would check compression at this point. Quote Link to comment Share on other sites More sharing options...
bigblockbanshee Posted March 13, 2011 Report Share Posted March 13, 2011 Bike is shutting down and sputtering on left cylinder, left side exhaust is weak I swapped plug wires and still same thing so coil is good. Put in new plugs still nothing checked compression 130 in both cylinders carbs are sync perfect and jetted exactly the same I'm at a loss some one have any idea wtf is going on or what to try ? Do you have a compression tester with you?? if not see if someone does or maybe the vendors are selling them. I would check compression at this point. Quote Link to comment Share on other sites More sharing options...
wacko2000 Posted March 13, 2011 Report Share Posted March 13, 2011 Yup, I must be real tired bc i could have sworn i read the whole thing and Def didnt see that. Quote Link to comment Share on other sites More sharing options...
SuperMex Posted March 14, 2011 Author Report Share Posted March 14, 2011 Checked left silencer and stinger no blockage I give up, I'm camped with some very knowledgeable guys and no one can figure this out. It idles but is spitting and sputtering and backfiring and once I run it the left cylinder shuts down going to have to pull motor apart to find the problem I guess Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted March 14, 2011 Report Share Posted March 14, 2011 It sucks having a ride ruined. What about the stator? What brand is it? Oem yamaha or an aftermarket one? Quote Link to comment Share on other sites More sharing options...
Wheatchex Posted March 14, 2011 Report Share Posted March 14, 2011 I'm gonna throw this one out there: You don't say if you have your TORS removed or not, but it sure sounds like the parking brake may be on and the TORS/Electronics is functioning like it's supposed to. That's my suggestion. Brian Quote Link to comment Share on other sites More sharing options...
SuperMex Posted March 14, 2011 Author Report Share Posted March 14, 2011 I tested my stator its good and it an oem yamaha, tors is removed as well as parking brake. Quote Link to comment Share on other sites More sharing options...
DallasGDub Posted March 14, 2011 Report Share Posted March 14, 2011 I would look more at the intake. If you swaped the plug wires and the problem stayed on that side, then chances are the stator is fine. Maybe check vent hoses, filter, spray some starter fluid around the intake look for a air leak. what are your mods, elev, and what jets do you have? Quote Link to comment Share on other sites More sharing options...
SuperMex Posted March 14, 2011 Author Report Share Posted March 14, 2011 I would look more at the intake. If you swaped the plug wires and the problem stayed on that side, then chances are the stator is fine. Maybe check vent hoses, filter, spray some starter fluid around the intake look for a air leak. what are your mods, elev, and what jets do you have? I forgot to mention a few things, sprayed ether around gaskets no air leaks, check and blew out all hoses everything on intake side is perfect, getting is dialed in for sure plug chop shows a nice light brown ring. Need to strip it down and pull motor to find problem Quote Link to comment Share on other sites More sharing options...
bode1 Posted March 15, 2011 Report Share Posted March 15, 2011 I had a similar problem when I rebuilt mine. One of slides in one of my carbs was spinning around when the bike was running, but looked normal when not running. The little brass piece in the side of the carb that keeps the groove on the slide in the right position had backed out., and allowed the slide to spin around with the vibration from running. That was with stock carbs right after the tors was removed. I noticed you had 28s, Idk if maybe you have a similar problem. Quote Link to comment Share on other sites More sharing options...
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