blue83ranger Posted December 7, 2010 Report Share Posted December 7, 2010 I'm working on a '89 banshee and i'm completely stumped what it's problem is and was wondering is there an easy way to tell if the crank twisted? The issues it has are that the cylinder closest to the flywheel misfires or seems like it doesn't fire. and i've cleaned the carbs. with kit's and it has a new rm stator to cure a no spark problem. tors box is unhooked. spark is great. and timing marks don't line up. switching the plug wires doesn't change anything. and if i leave the misfiring cylinder wire off or take it off while ti's running it will die or won't start. So the short version is that one cylinder is firing at the wrong time. according to the flywheel and how it acts. any ideas? Quote Link to comment Share on other sites More sharing options...
Phelps Posted December 7, 2010 Report Share Posted December 7, 2010 I'm working on a '89 banshee and i'm completely stumped what it's problem is and was wondering is there an easy way to tell if the crank twisted? The issues it has are that the cylinder closest to the flywheel misfires or seems like it doesn't fire. and i've cleaned the carbs. with kit's and it has a new rm stator to cure a no spark problem. tors box is unhooked. spark is great. and timing marks don't line up. switching the plug wires doesn't change anything. and if i leave the misfiring cylinder wire off or take it off while ti's running it will die or won't start. So the short version is that one cylinder is firing at the wrong time. according to the flywheel and how it acts. any ideas? depending on how bad it was it would take a degree wheel. get one piston top tdc with the head off and mark where the pickup is on the flywheel then do the other cylinder. inspect the fly wheel and make sure your marks are the same on both sides (position of mark on the raised surface) only way i know of without having a tdc tool, or degree wheel. Quote Link to comment Share on other sites More sharing options...
AKheathen Posted December 9, 2010 Report Share Posted December 9, 2010 well, if the crank is, indeed, out of phase, it would be the right(clutch side) one out of time. start with adjusting your flywheel gap on both nodes, and check the coil-frame grounding for rust. then, the plug caps, and make sure there is good ground between the harness, frame, engine, and coil. rs are junk pretty often, so that new stator could be a problem, too, and i would never trust a rs flywheel. Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted December 9, 2010 Report Share Posted December 9, 2010 Exactly how did you determine one side is out of time?Both the triggers and the timing marks(?) are on the flywheel so that would not tell you if it is out of time. If the crank is twisted it will shake badly. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted December 9, 2010 Report Share Posted December 9, 2010 If both pistons are at TDC or BDC at the same time. Quote Link to comment Share on other sites More sharing options...
trx4502shee Posted December 9, 2010 Report Share Posted December 9, 2010 If you changed the stator when you put the flywheel back on if you didn't tighten it with an impact the flywheel could be loose enough the shear the woodruff key (which is the key for the crank and flywheel) which would put your timing marks off it has happened to me before Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted December 10, 2010 Report Share Posted December 10, 2010 If both pistons are at TDC or BDC at the same time. No shit, I wanted to know exactly what blueranger did to determine it was out of time- Did he stick something down the plug hole of each cylinder to determine when they are at TDC and BDC?Does he have the crank out so he can see if it is out of phase? From what I read in this thread, it sounds like he has had a timing light on it and the marks dont line up so he thinks the crank is twisted. But as I said before, the triggers and the supposed marks are both on the flywheel so that won't be accurate. Quote Link to comment Share on other sites More sharing options...
SkinInd_Banshee Posted December 12, 2010 Report Share Posted December 12, 2010 The bike will have a extreme runaway idle condition and shake badly. mery-xmas Quote Link to comment Share on other sites More sharing options...
AKheathen Posted December 12, 2010 Report Share Posted December 12, 2010 ...oh., and there actually is a timing mark on the flywheel and case, but that being off would be more-so in the cdi, or pick-up/plate not lined up to stock. however, that would effect both sides, so, you can toss that idea out. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted December 12, 2010 Report Share Posted December 12, 2010 Another easy way to tell if it is twisted. Put it in a box and send it to FAST. Quote Link to comment Share on other sites More sharing options...
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