Banshee266 Posted March 8, 2009 Report Share Posted March 8, 2009 I put a new top end on and it ran like a champ. After about the 10th hour of use one day it started overheating. Hasnt ran the same since. I did a compression test and got about 115lbs from both cylinders. Seems a little low but not sure. The only way I can get it to start is to take the breather off and shoot a tad bit of carb cleaner through the carbs. Once it starts I have to open the throtle a tad to keep it running. After it warms up a bit it will idle on its own. Problem is its only idling off one cyclinder. no smoke coming out of the other side. Just cold air. If I shoot more cleaner into the side thats not firing it will start firing till it burns off the carb cleaner and then stop again. I changed out the carb thinking it wasnt suppling fuel and it still does the same thing. Both plugs are getting spark. new plugs. Seems like a fuel problem but I dont know. I took out both carbs and cleaned them again. still the same thing. only one cyclinder fires. Any IDEAS??? Thanks Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted March 8, 2009 Report Share Posted March 8, 2009 Need more info,why did it overheat and how bad,thats a factor,with clearance issues sometimes,and you can collapse piston skirts Quote Link to comment Share on other sites More sharing options...
Banshee266 Posted March 8, 2009 Author Report Share Posted March 8, 2009 Need more info,why did it overheat and how bad,thats a factor,with clearance issues sometimes,and you can collapse piston skirts Im not sure why it overheated. I didnt notice it was overheating till i stopped and heard the radiator bubbling. I saw no leaks anywhere. So maybe water pump. Not sure. All the problems started after it overheaded tho. So maybe your right..i need to take it back apart and check rings and skirts. Do you think the 115lbs compression is ok or not?? Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted March 8, 2009 Report Share Posted March 8, 2009 Its not ok but it will run just bad,see if the cylinder is glazed,did you bore for the top end or just throw pistons in.You could have been out of clearance from the get go,or overheated from air leak,what was compression when you put it together Quote Link to comment Share on other sites More sharing options...
Banshee266 Posted March 9, 2009 Author Report Share Posted March 9, 2009 Its not ok but it will run just bad,see if the cylinder is glazed,did you bore for the top end or just throw pistons in.You could have been out of clearance from the get go,or overheated from air leak,what was compression when you put it together This is my first banshee if you couldnt tell..lol so i am no mechanic but learning. With that said..I bought a fresh complete top end. New jugs,pistons,ring. It was a complete set bored .66 over. So All i had to do was bolt everything on. My fault for not checking compression right after it was built. I pre-oiled everything when i put it together. I still havent looked into why it overheaded yet...been just tryin to get it running right first. What kind of air leak will cause it to overheat? Some guy told me i might have a stuck ring. If i take to top end apart what should i look for as far as damaged rings,cylinder walls, pistions? thanks a bunch for your help!! Quote Link to comment Share on other sites More sharing options...
tidos76 Posted March 9, 2009 Report Share Posted March 9, 2009 Best think is to just tear it down. Check everything. be sure to look for scaring on the cylinder sleve, and check your pistons. 115lbs is low. If i see 115lbs its usually time for a rebuild. Also may need to do a leak down test once you get it back together. Quote Link to comment Share on other sites More sharing options...
Banshee266 Posted March 9, 2009 Author Report Share Posted March 9, 2009 Best think is to just tear it down. Check everything. be sure to look for scaring on the cylinder sleve, and check your pistons. 115lbs is low. If i see 115lbs its usually time for a rebuild. Also may need to do a leak down test once you get it back together. ok..tearing it back down tomarrow. will let you know what if find. dont know how to do a leak down test but im sure its somewhere here in the forums? Quote Link to comment Share on other sites More sharing options...
tidos76 Posted March 9, 2009 Report Share Posted March 9, 2009 Leak down tester Quote Link to comment Share on other sites More sharing options...
Banshee266 Posted March 9, 2009 Author Report Share Posted March 9, 2009 Leak down tester Thanks for the info...great help...should i go ahead and do a leak down test before i open it up and do a visual check? Quote Link to comment Share on other sites More sharing options...
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