lastlegwarrior Posted September 13, 2004 Report Share Posted September 13, 2004 Ok, finally i figured out my electrical problem. After i rewired the entire shee i found a bad wire to the on and off switch, replaced and it was good to go, at least i thought. I couldn't figure out why the thing would still sputter and spit, also it would never hit the powerband. So i checked the compression, 43 psi in each cylinder, wtf, i just rebuilt the thing (new cylinder bore, pistons, and seals). So the thing is, how can i tell which one it is, seals or just a bad bore job? Also i know you have to kick the crap out of shee's to get a correct psi reading and i did, just thought i would add that. But anyways what is the deal with such low compression? I've installed pistons, cylinders, and seals before. I even had the trusty ol'clymers manual by my side just in case. Also this is just an opinion question, the shop that did the bore job also ordered the pistons to fit the cylinders, wouldn't you think if that was the deal (bad compression because of misfit piston to cylinder clearances) they would at least rebore my cylinders and maybe get me some new pistons? or is that just wishful thinking, but i don't even have 5 minutes in on the cylinders and i only have 43 psi. Sorry for the rambling but this kind of made me wonder though with only 43 psi i wouldn't even think the thing would idle even for a little bit and it did) (sometimes i would have to play with the choke) but then it would eventually die off, i tried to ride it a bit and you can putt around and to a point it will get faster not much faster though and then it just boggs. Although like i said before it could also be the seals. Just wondering if anyone could give me their diagnoses on my current problems, also like i asked before is there anyway to distinguish the difference between bad seals and a bad bore job? Thanks for the help once again. Quote Link to comment Share on other sites More sharing options...
mrmatt Posted September 13, 2004 Report Share Posted September 13, 2004 Re-check the compression with a different gauge. It may be that your gauge is wrong, not that your compression is that low. I wouldn't expect your banshee to run at all with 43 psi compression. My old gauge would show 70 psi on a new stock motor. So I changed the shrader valve and now it reads 50 psi higher. Quote Link to comment Share on other sites More sharing options...
lastlegwarrior Posted September 13, 2004 Author Report Share Posted September 13, 2004 the guage is good, because i thought the same thing. So i checked my buddies acura integra, it said he had a 150psi so that knocks that out, thanks for the idea though, keep the ideas and tips flowing. thanks. Quote Link to comment Share on other sites More sharing options...
duner Posted September 13, 2004 Report Share Posted September 13, 2004 The seals have nothing to do with compression.Pull the top end down & check out the ring clearance.Could be the head is not sealing. Are you running a cool head or stock head.I'm assuming we're talking crank seals? Quote Link to comment Share on other sites More sharing options...
Toomey Banshee Posted September 13, 2004 Report Share Posted September 13, 2004 If it was your crank seals you would be blowing crank oil out of one of your pipes. Quote Link to comment Share on other sites More sharing options...
tats4life Posted September 13, 2004 Report Share Posted September 13, 2004 sounds like you might have seized a ring.......pull the head and do some lookin. Quote Link to comment Share on other sites More sharing options...
bigtreads Posted September 16, 2004 Report Share Posted September 16, 2004 another thing to remember is to keep the throttle wide open in order to get a acurate reading. Personaly I think either the comp. testor is messed or it isn't sealing etc. as the motor most likely wouldn't start with compresion that low (as was already mentioned) Quote Link to comment Share on other sites More sharing options...
Justintoxicated Posted September 17, 2004 Report Share Posted September 17, 2004 is there a chance that your testor seals better on the car than it does to the bike? you could spray some wd 40 or something around where it threads in and see if it bubbles when you kick it over... Quote Link to comment Share on other sites More sharing options...
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