twayne24365 Posted July 5, 2015 Report Share Posted July 5, 2015 well i got my bike started up after a a top end build..... left cylinder runs great but right cylinder acts like its mis firing then under a small rev it cuts out. left side: put put put, right side put....put....put. is the best i can explain it. yes it has tors that is unplugged and the carbs are syncd....any suggestions? Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted July 5, 2015 Report Share Posted July 5, 2015 Start looking at the electrical. 1 Quote Link to comment Share on other sites More sharing options...
twayne24365 Posted July 5, 2015 Author Report Share Posted July 5, 2015 Start looking at the electrical. wouldnt that be the wires coming from stator and the two wires to the coil? i checked spark and the mis firing cylinder is getting spark. it also has a new oem coil Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted July 5, 2015 Report Share Posted July 5, 2015 What do the plugs look like? Were they new? Quote Link to comment Share on other sites More sharing options...
twayne24365 Posted July 5, 2015 Author Report Share Posted July 5, 2015 yea, new plugs, ngk br8es... the right cylinder (mis firing cylinder) looks to be a little dry or lean, i pulled the bowl on that carb and took it apart cleaned it all and re assembled. still does the same thing. Quote Link to comment Share on other sites More sharing options...
toytech Posted July 5, 2015 Report Share Posted July 5, 2015 air leak. did you do a leak down test? Quote Link to comment Share on other sites More sharing options...
twayne24365 Posted July 5, 2015 Author Report Share Posted July 5, 2015 no sir i didnt,....i didnt notice a crack in the intake boot or anything, where else could i have an air leak? Quote Link to comment Share on other sites More sharing options...
camp0429 Posted July 5, 2015 Report Share Posted July 5, 2015 Very common for reeds/intakes to leak. Do a leakdown Quote Link to comment Share on other sites More sharing options...
twayne24365 Posted July 6, 2015 Author Report Share Posted July 6, 2015 ill do a search on leakdown. i messed with the carbs for a while and got it much better, i noticed that the needle valves have a ring imprinted into them so i ordered carb rebuild kit with everything.....but its not mis firing now just seems like its not quite blowing as hard as the other side at idle, but once you give it a rev they are both even.....going to do a comp. test tomorrow and if that turns out good i guess ill re seal the reeds and intake. on another note what about jetting? the bike is fresh std bore with v force reeds, dg pipes stock air box and uni filter. does a 290 main jet and stock piolet sound about right? thats what is coming with the rebuild kit Quote Link to comment Share on other sites More sharing options...
twayne24365 Posted July 6, 2015 Author Report Share Posted July 6, 2015 ok guys so i got it figured out now i just dont know what the fix is lol. got the bike started and warmed up and the right cylinder doesnt run as well as the left, but if you pull the choke on both cylinders are identical and run like a top! the hose that hooks the choke to the left carb is on and tight... would that mean there has to be an air leak at the reed/intake on the left carb? Quote Link to comment Share on other sites More sharing options...
twayne24365 Posted July 6, 2015 Author Report Share Posted July 6, 2015 *leak at RIGHT carb, my bad lol Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted July 6, 2015 Report Share Posted July 6, 2015 Lol , break down and do a pressure test your dancing around it like its the plague . Your guessing any other way . You might guess rite you might not but each time you continue to run the motor not tight or fucked up you risk burning up shit u just installed, do you have a vacuum guage to set sync up , pilot circuit could be clogged . Either way your very very first step should be a pressure test , then compression, then fuel, then spark Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted July 6, 2015 Report Share Posted July 6, 2015 needs bigger pilots Quote Link to comment Share on other sites More sharing options...
twayne24365 Posted July 12, 2015 Author Report Share Posted July 12, 2015 alright guys, did a leakdown and that was perfect, compression 124 in left cylinder and 123 in right cylinder, rebuilt both carbs, the kit came with 290 mains and the pilots said 30 so i used them. when i put it back together i accidently swiched the reed cages. started it up and now its the left cylinder that runs funny, you think that its time for new reeds? Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted July 13, 2015 Report Share Posted July 13, 2015 alright guys, did a leakdown and that was perfect, compression 124 in left cylinder and 123 in right cylinder, rebuilt both carbs, the kit came with 290 mains and the pilots said 30 so i used them. when i put it back together i accidently swiched the reed cages. started it up and now its the left cylinder that runs funny, you think that its time for new reeds? I think most kits are useless, jets don't wear out, and most don't have the jets you need. If swapping moved the problem, there's a clue. As to the spark, a Bangshee uses a wasted spark, both plugs fire at same time, very hard/ to near impossible to tell cylinder the spark is for. i wouldnt that be the wires coming from stator and the two wires to the coil? i checked spark and the mis firing cylinder is getting spark. it also has a new oem coil Quote Link to comment Share on other sites More sharing options...
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