fastbanshee8 Posted July 3, 2011 Report Posted July 3, 2011 I'd have to say that you are lean on the left cylinder, and it's probably from a leaking base gasket, reed cage gasket, or a torn, and/or leaking intake. Being lean will cause hard starting issues, and a power loss. Quote
SteveCZ28 Posted July 3, 2011 Author Report Posted July 3, 2011 I'd have to say that you are lean on the left cylinder, and it's probably from a leaking base gasket, reed cage gasket, or a torn, and/or leaking intake. Being lean will cause hard starting issues, and a power loss. that does bring up another thing it will do time to time. itll start revving way high on its own, and ill hit the killswitch and it almost acts like its dieseling and running hot and combusting on its own with no speark, then will snap out then die. Quote
BluBanshee98 Posted July 3, 2011 Report Posted July 3, 2011 http://www.bansheehq.com/forums/index.php?/topic/110585-Leakdown Tester There's the link...I just got done making one...way easy. That cylinder is more than likely sucking air! What do your plugs look like? Quote
SteveCZ28 Posted July 3, 2011 Author Report Posted July 3, 2011 http://www.bansheehq.com/forums/index.php?/topic/110585-Leakdown Tester There's the link...I just got done making one...way easy. That cylinder is more than likely sucking air! What do your plugs look like? idk why but when i click on that link all it does is take me to the home page for this site. Quote
fastbanshee8 Posted July 3, 2011 Report Posted July 3, 2011 http://bansheehq.com/forums/index.php?showtopic=110585 Quote
SteveCZ28 Posted July 3, 2011 Author Report Posted July 3, 2011 (edited) ok i tore into my shee today. pulled the motor as i was going to check the top end gaskets. pulled motor out, and pulled the head off...not happy with what i found. i now know why my left cylinder was acting up. something let go in the left cylinder. shrapnel all over the piston, and head. but the right (good) cylinder looked brand new...took jugs off, and found something cracked the rings on the left cylinder then welded them in to where they werent allowing compression to be made, as they were stuck in the grooves, and broken in a few places. once again right side was perfect. left jug has some really bad gouge marks. so atleast i know why its acting up, but now i need to know why it did this...hers some pics of what i found also i know i said it was a 20 over earlier, i just looked the piston numbers up again, their actually 1.50 over....and would have created a 375cc displacment. i wish it ran good enough for me to ride it more than 5 minutes and really know what this bike was about....now i am at stage one again and starting over right cylinder Edited July 3, 2011 by SteveCZ28 Quote
fastbanshee8 Posted July 4, 2011 Report Posted July 4, 2011 It's ugly, but fixable. Hopefully the crank isn't hurt. You should go ahead and tear the bottom end apart, and check the crank, bearings, and seals. It's hard to say what caused the problems, without tearing it down further. Quote
SteveCZ28 Posted July 4, 2011 Author Report Posted July 4, 2011 screw from reed cage? nope all of the screws from both sets of reeds are present and accounted for Quote
SteveCZ28 Posted July 4, 2011 Author Report Posted July 4, 2011 It's ugly, but fixable. Hopefully the crank isn't hurt. You should go ahead and tear the bottom end apart, and check the crank, bearings, and seals. It's hard to say what caused the problems, without tearing it down further. ive never tore a bottom end of a motor like this down before. good thing i have a clymers manual. ill attempt to tear down, and im thinking it would be smart to put new bearings/seals in down there just to eliminate that from a possible cause. i did kinda wiggle/rattle the rod on the left cylinder. it doesnt have any play or slop in it, so hopefully its good Quote
Rotax Raptor Posted July 4, 2011 Report Posted July 4, 2011 I posted this on another thread, but I had the weld break out of my welded crank and tore my cases, piston and dome up. Take a magnet and see if there are any metal pieces stuck in your head or piston. Quote
SteveCZ28 Posted July 4, 2011 Author Report Posted July 4, 2011 I posted this on another thread, but I had the weld break out of my welded crank and tore my cases, piston and dome up. Take a magnet and see if there are any metal pieces stuck in your head or piston. i just checked it. most of the little pieces are not magnetic. but there are 2 bigger chunks that are. they almost look like a chunk of a ring tho Quote
fastbanshee8 Posted July 4, 2011 Report Posted July 4, 2011 Two strokes are pretty simple to work on, and the manual is a big help. Just take your time, and if you have any problems, somebody here will be able to get you going again. Quote
SteveCZ28 Posted July 4, 2011 Author Report Posted July 4, 2011 the worrysome part for me is pulling thwe crank and not messing up the tranny, and shifting forks but yea like you say i have a manual so itll help me thru this. i wont have time till next weekend to tear it further down tho Quote
Rotax Raptor Posted July 4, 2011 Report Posted July 4, 2011 I agree, just get a book and TAKE PICTURES as u take it apart for reference when putting back together. The manual is very descriptive on parts but it doesn't hurt to have the actual photo. If u get stumped feel free to ask for help. Quote
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