RUDEDAWG Posted January 31, 2008 Report Share Posted January 31, 2008 Whats up. My shee has been backfiring like crazy from the right side lately and I have searched and searched but to no avail. I've tried EVERYTHING! The only thing that I can think of thats causing the backfiring is maybe my crank slipped out of phase? It is not welded. Is there any easy ways to tell if the crank is out of phase without taking it out? My mods are in my sig, the bike is virtually new and has very low hrs. Man, I hope I didn,t ruin my shee by modding it, that would really suck. Any help would be greatly appreciated. I........... cleaned carbs meticulously, no clogged anything new flywheel new exhaust o-rings and clamps leak down test held 9lbs. for 30 minutes new plugs gapped at 28 new plug wires and caps swapped wires-no change fresh top end 162 psi both cylinders tested coil tested stator new pipes so I don't think the silencer packing is bad new reeds only thing left is testing the crank! (I think) :ermm: Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted January 31, 2008 Report Share Posted January 31, 2008 (edited) What gas are you running? Ported Cylinders? Is it misfiring or backfiring? Detonationg possibly, is your compression testor reliable? Misseding something durring the fresh topend? Cleaned Pilot Jets with twisty tie? Factory parking brake or removed? Let us know. If you swapped plug wires and it's electrical and the side with the symptom didn't change, then that pretty much probably eliminates electrical. So then perhaps your detonating, just need to figure out why. Have you pulled the head back off? Edited January 31, 2008 by Justintoxicated Quote Link to comment Share on other sites More sharing options...
RUDEDAWG Posted January 31, 2008 Author Report Share Posted January 31, 2008 What gas are you running? Ported Cylinders? is it misfiring or backfiring? Detonationg? Misseding someing durring the fresh topend? Cleaned Pilot Jets and Carbs? Factory parking brake or removed? Let us know. running trick 101 factory parking brake still in tact Quote Link to comment Share on other sites More sharing options...
RUDEDAWG Posted January 31, 2008 Author Report Share Posted January 31, 2008 sounds like a fire cracker going off every 5 or 10 pulses Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted January 31, 2008 Report Share Posted January 31, 2008 running trick 101 factory parking brake still in tact Try futsing with the parking brake (engauge disengauge) for a while (and see if it clears up while disengauged). Sometimes the switch will get stuck and cause one side to misfire or not rev up. Quote Link to comment Share on other sites More sharing options...
shee4speed Posted January 31, 2008 Report Share Posted January 31, 2008 Tors still on there? Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted January 31, 2008 Report Share Posted January 31, 2008 sounds like a fire cracker going off every 5 or 10 pulses So probably backfring and not a parking brake issue, I would not run it then. Shut it down and pull the head I guess... Did you test the compression cold then I would assume? Probably detonating on one side Quote Link to comment Share on other sites More sharing options...
RUDEDAWG Posted January 31, 2008 Author Report Share Posted January 31, 2008 no tors and I really don't think it is detonating, my compression tester is a new one Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted January 31, 2008 Report Share Posted January 31, 2008 no tors and I really don't think it is detonating, my compression tester is a new one Even new some are not accurate, also did you test the compression when cold or warmed up cause 162 cold is pretty high. 101 shounds pretty good though for around 170 PSI, but if your cold at 162 and your gauge is off a bit it's possible. Either way I would probably pull the head and go from there I suppose, could be the crank I guess, did you use the proper tools when installing your stator? is there any wobble on the crank when you turn it over by hand? is there more noticable vibration/wobble when you were reving the bike. Packing is probably not going to cause this. Did you remove the paper towels that were plugging the cylidners before you put the pipes on? heh I forgot to do that once! Quote Link to comment Share on other sites More sharing options...
RUDEDAWG Posted January 31, 2008 Author Report Share Posted January 31, 2008 Would the crank being out of phase cause this? Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted January 31, 2008 Report Share Posted January 31, 2008 Would the crank being out of phase cause this? Did you check the crank when you pulled the topend apart? Quote Link to comment Share on other sites More sharing options...
blowit Posted January 31, 2008 Report Share Posted January 31, 2008 Would the crank being out of phase cause this? The answer is yes, but it will run like crap consistently and generally cause an out of balance condition. If you are suspecting a spun crank, you will need a dial indicator and degree wheel. True TDC will be found off one cylinder with the indicator, reset degree wheel to zero, spin crank 180* and hope that is TDC for the other side. Brandon Quote Link to comment Share on other sites More sharing options...
RUDEDAWG Posted January 31, 2008 Author Report Share Posted January 31, 2008 Did you check the crank when you pulled the topend apart? As far as side to side movement of the rods they were still in spec. according to the clymers manual. The motor has maybe 30 hrs. on it if that. Before I put the new ported jugs on, I was pushing it pretty hard up a steep hill and I heard a pop and smelled antifreeze for a split second. I already had all the parts sitting there for a new top end so I decided to install them after that episode. I also installed new o-rings on the cool head. Thanks for the replies! Quote Link to comment Share on other sites More sharing options...
xXBlessedWithDeathXx Posted January 31, 2008 Report Share Posted January 31, 2008 Would the crank being out of phase cause this? I split a crank in 2 once and now that i think about it, it was backfiring previous to the brake. i`m can`t say thats your problem but thats my story. if i were you i would pop them peddles out of them V-force 3 reeds and hold them baby's up to the light to see if you have pin holes in them and if you do replace them bitches. thats my opinion. Quote Link to comment Share on other sites More sharing options...
RUDEDAWG Posted January 31, 2008 Author Report Share Posted January 31, 2008 (edited) I split a crank in 2 once and now that i think about it, it was backfiring previous to the brake. i`m can`t say thats your problem but thats my story. if i were you i would pop them peddles out of them V-force 3 reeds and hold them baby's up to the light to see if you have pin holes in them and if you do replace them bitches. thats my opinion. I even went as far as putting my stock reeds back on and no change? Edited January 31, 2008 by RUDEDAWG Quote Link to comment Share on other sites More sharing options...
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