yosi Posted October 29, 2010 Report Share Posted October 29, 2010 (edited) Hey just like to start by saying im new to this forum, and ive been reading some posts up here and i think its great. Now to my problem with my banshee i recently bought, it wont fire at all when trying to kick start it. it will only start when i give it a push start then it runs but not very well, as in it wont idle and i have to keep the choke open. But once it starts to rev in the higher rps it is fine, just wont idle. once it dies it can be started by the kick start in one kick and holding the choke open but starts to bog down again, and cannot be strated after that. to me i think it might be something to do with the fuel not entering the engine (dirty carburetor) or the jetting mabey (Im at sea level). Was also thinking about doing a compression test but would just like to get another opinion first. I am running fmf gold series pipes with silencers, not sure what the jetting is (planning on cleaning carby and finding out), has a K & N air filter with outerwair and no air box lid, has new spark plugs, running 32:1, and the TORS have been disconnected but the boxes above the carburetor are still attached. Any input wil be greatly appreciated. sorry just realised its in the wrong forum section too. Edited October 29, 2010 by yosi Quote Link to comment Share on other sites More sharing options...
beven28 Posted October 29, 2010 Report Share Posted October 29, 2010 Check your compression, sounds like it's time for a rebuild!! Quote Link to comment Share on other sites More sharing options...
yosi Posted October 29, 2010 Author Report Share Posted October 29, 2010 approximately how much will a rebuild cost for the top end, and what does it include. pistons, rings gasket anything else haha Quote Link to comment Share on other sites More sharing options...
Larry's Shee Posted October 29, 2010 Report Share Posted October 29, 2010 Welcome to BHQ !! Start by cleaning carbs one at a time , completely disassemble write down sizes, set float height inspect float needle valve. Sync carbs install choke crossover tube. Do comp test, WOT fuel off kick till gauge stops , threads same as plug. Do all diagnosis BEFORE tearing apart. Granted a weak engine will be hard to start BUT just because it's hard to start doesn't mean it needs to be rebuilt. Tired of everyone just saying rebuild , then you'll be back saying my freshly rebuilt engine is hard to start. JMO , your results may vary. Quote Link to comment Share on other sites More sharing options...
yosi Posted October 29, 2010 Author Report Share Posted October 29, 2010 Thanks for the reply and info, will hopefully get the carby out and cleaned when i have some free time. What if teh bike still does the same thing after the carby has been cleaned etc. Could it be the jetting because im not sure if it has stock jetting or not. Quote Link to comment Share on other sites More sharing options...
CFH87 Posted October 29, 2010 Report Share Posted October 29, 2010 Check plug gaps ALL connections clean carbs and do a compressionn test go from there. Quote Link to comment Share on other sites More sharing options...
beven28 Posted October 29, 2010 Report Share Posted October 29, 2010 Welcome to BHQ !! Start by cleaning carbs one at a time , completely disassemble write down sizes, set float height inspect float needle valve. Sync carbs install choke crossover tube. Do comp test, WOT fuel off kick till gauge stops , threads same as plug. Do all diagnosis BEFORE tearing apart. Granted a weak engine will be hard to start BUT just because it's hard to start doesn't mean it needs to be rebuilt. Tired of everyone just saying rebuild , then you'll be back saying my freshly rebuilt engine is hard to start. JMO , your results may vary. Dude, I told him to check compression, I didnt just tell him to rebuild the thing... Quote Link to comment Share on other sites More sharing options...
yosi Posted October 29, 2010 Author Report Share Posted October 29, 2010 just a question, you say to write down the sizes, are you reffering to the jet sizes or something else. thanks Quote Link to comment Share on other sites More sharing options...
beven28 Posted October 29, 2010 Report Share Posted October 29, 2010 It takes 5 minutes to check compression compared to the 15 to 20 minutes to clean the carbs. I always start with the easy stuff then move on to the more difficult things. Quote Link to comment Share on other sites More sharing options...
beven28 Posted October 29, 2010 Report Share Posted October 29, 2010 Yeah I'm sure he meant the main and pilot jet sizes as well a the clip position on the needle. Quote Link to comment Share on other sites More sharing options...
yosi Posted October 29, 2010 Author Report Share Posted October 29, 2010 Thanks, you guys have been a great help. If the jets are stock in the carby when i check it, what would be your recomendations for the size of the main jet, pilot jet, and needle position? Quote Link to comment Share on other sites More sharing options...
beven28 Posted October 29, 2010 Report Share Posted October 29, 2010 Check the pinned articles in the jetting and exhaust forum. It has some great info! Quote Link to comment Share on other sites More sharing options...
yosi Posted October 30, 2010 Author Report Share Posted October 30, 2010 Ok so ive done a compresion test and looks like i will need the top end done because my left cylinder has compression of around 97 and my right cylinder compression is around 94 PSI. Unless it has something to do with the my reeds being broken or damaged letting the air to flow back out through them?? I also thought i heard some air escaping ( only very slightly) when i was doing the compression on my right cylinder thought it might have been that i didnt tighten the spark plug or the connection to the compression tester well enough so i tightened it and still heard it? might of just been the air passing through the connection tube. Do a leak down test mabey . . . . or just get the top end done and a new head gasket put in and then check for leaks? Anyone one know how much a top and costs on one of these engines and what the best setup will be. King regards Quote Link to comment Share on other sites More sharing options...
yosi Posted October 30, 2010 Author Report Share Posted October 30, 2010 Oh and the compression was done with a cold engine so im guessing that if i done it with a warmed engine the pressure would rise abround 5 PSI i think? Quote Link to comment Share on other sites More sharing options...
Forcefed Posted October 30, 2010 Report Share Posted October 30, 2010 Remove the bowls, remove the pilot jets, clean the pilots, put bowls back on & go ride Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.