whats the problem?

[Gurnzz]

i have a 98 banshee. stock engine, fmf fatties with powercore 2 silencers. boost bottle. k&n filter with no lid. had a 260 main and stock pilot jet. wouldnt idle, only would start on a pop and had no acceleration. 32:1 mixture ? any suggestions( fuel ratio,jetting, etc...) i live in springfield, massachusettes. any help would be greatly appreciated !!!

thanks !

[mopar1rules]

did it smoke like crazy? on my shee w/ fmf fattys and core2 silencers, k&n filter, and boost bottle, i run 350 mains, 25 or 27.5 pilots, stock needles @ stock clip position, stock air jets, but my air box lid is back on. just for shits, put you lid back on and see if its better. if it is, then your are lean. put needle clip position in the middle too for now, if you have stock needles.

[Animalman294]

Try a 280-300, but start with the 300 because you can always come down, the pilot would be a 27.5 and ratio at about 32:1...........

[Gurnzz]

did it smoke like crazy? on my shee w/ fmf fattys and core2 silencers, k&n filter, and boost bottle, i run 350 mains, 25 or 27.5 pilots, stock needles @ stock clip position, stock air jets, but my air box lid is back on. just for shits, put you lid back on and see if its better. if it is, then your are lean. put needle clip position in the middle too for now, if you have stock needles.

no it didnt smoke really at all. i tried the lid back on before and it seemed to get worse. im going to try to up jet it to like a 300 , and change the needle position clip and see what happens from there. ill let ye know. thanks for the feedback !

[Gurnzz]

Try a 280-300, but start with the 300 because you can always come down, the pilot would be a 27.5 and ratio at about 32:1...........

if i start with the 300 where should i put the clip on the needle. the needle is stock. and also if the 300 is a lil too much can i just lean it out a lil by moving the clip up a notch on the needle clip. reason being i ride quite a bit in pittsfield Ma which is about a thousant feet higher than my local elevation. so if it ran a lil fat at my elevation which is i believe around 125ft above sea level wouldnt it be just about right in pittsfield. i will have to order that 27.5 cuz the local dealers dont have it. do u think that the 25 pilot jet is the starting problem? thanks for the reply. greatly appreciated!

[thdog3]

a friend of mine had similiar problems with the hard starting and it turned out the carbs were way out of sync from the factory.didnt notice it in stock trim but when pipes were added it exploited the problem.personally ive run with the lid on no snorkel of course,k&n,pro circuits 310 mains stock pilots,stock clip pos(center i believe)with great sucess.adjust the air screw by moving 1/4 turn at a time until it runs the best.start at a 1/2 turn out change 1/4 or 1/8 turn out until you get it where it has best throttle response.

[mopar1rules]

Gurnzz, you said that the problem gets worse when you put the lid on. that's telling me that its a rich condition. taking the lid of would make it breath better and lean it out, so if when the lid goes back on and the performance gets worse, should tell you that its to rich. so, jetting up to 300 mains from 260 would make it worse. i would look into sync the carbs, like someone already stated. what do the plugs look like after a wide open throttle pull in 6 gear? if they are a wet black, or even a dark chocolate brown, then you are rich. please do a wide open run in 6 gear. when wide open for like 800 feet or better, pull in clutch lever & kill the engine, but stay on the throttle until you come to a stop. pull plugs and look. can you post pics of your plugs for us?

[Gurnzz]

Gurnzz, you said that the problem gets worse when you put the lid on. that's telling me that its a rich condition. taking the lid of would make it breath better and lean it out, so if when the lid goes back on and the performance gets worse, should tell you that its to rich. so, jetting up to 300 mains from 260 would make it worse. i would look into sync the carbs, like someone already stated. what do the plugs look like after a wide open throttle pull in 6 gear? if they are a wet black, or even a dark chocolate brown, then you are rich. please do a wide open run in 6 gear. when wide open for like 800 feet or better, pull in clutch lever & kill the engine, but stay on the throttle until you come to a stop. pull plugs and look. can you post pics of your plugs for us?

ok mopar ill try that. wont prolly get to it till this weekend so ill let ya know. thanks for the advice.

[Animalman294]

I wouldn't adjust the needle to compensate for main jet change. The needle is for 1/8 to 3/4 throttle and the main is for 3/4 to full throttle, but they overlap but I would still just change the main...........

[duner]

The not idling part is bothering me. The main jets don't compensate for the idle. Have you had the carb tops off? Carb slides might be in backwards. I found this on a guys bike he had just rebuilt.

[Gurnzz]

The not idling part is bothering me. The main jets don't compensate for the idle. Have you had the carb tops off? Carb slides might be in backwards. I found this on a guys bike he had just rebuilt.

hey duner i have not had the tops of the carbs off yet. i just bought this banshee last week and all i know is that it wasnt ridding in like a year. all i have done to it so far is pipes, jets, boost bottle. new plugs, crankcase oil, fuel, k&n with no lid and some cosmetic stuff. umm when i pull off the tops of the carbs will it be obvious if the slides are in backwards??? thanks for the reply !

[fastbanshee8]

Fatty's like a bigger pilot. Order the 27.5's, and the starting problems should go away, if you have everything else adjusted right.

[duner]

hey duner i have not had the tops of the carbs off yet. i just bought this banshee last week and all i know is that it wasnt ridding in like a year. all i have done to it so far is pipes, jets, boost bottle. new plugs, crankcase oil, fuel, k&n with no lid and some cosmetic stuff. umm when i pull off the tops of the carbs will it be obvious if the slides are in backwards??? thanks for the reply !

 

Pull off the filter & look into the carbs. They should have a radius cut out at the bottom of the slides facing the filter.

[mopar1rules]

yeah, you may have the slides in wrong. both my buddy and i were lean if we went under 330 mains. both of us have the fatties w/core 2 silencers, but run 50:1 ratio. my shee and my buddies shee, are pretty close to yours, as far as mods go. your mixture is pretty rich (32:1), so could probably get by with 320-330 mains, depending on your altitude of course.