Need Help Please

[98TEAM ALBA]

I have a 1998 Banshee. It has fatty pipes with pc2 silencers. K&N filter with no lid. TORS removed. The jetting is 290 mains, needle on 4th clip, 27.5 pilot and 1.5 turns on the airscrew. I am having a problem when she is warm. It will run great up until it starts to get warm the it will start to sputter alot on the low-end. I thought it was rich on the pilot but, when I went to a 25 pilot it will backfire and pop alot on the low-end, went to a 30 pilot and noticed no difference. I was just wondering why it would only do this when the bike gets hot. Is there possibly something I am overlooking or is it a possible electrical problem. I have checked for air leaks with carb cleaner and nothing was found. I am completely confused. Someone please help!

[J-Madd]

I had a similar problem, except it sputtered on low end all the time. I got fed up and bought new PWK 30mm, jetted at the factory for my shee. Still sputtered on bottom. I adjusted the air screw leaner and put my needle at the leanest position It had previously been at the next to leanest pos. It screamed after that.

 

When I still had stock carbs, I also put the stock pilot back in (going down from the #30 I had in it). It didn't work.

 

You'll get much better advice than this, but just my 0.02.

[98TEAM ALBA]

bump

[2Smoker]

When it suptters does it smoke? And what do the plugs look like after it has idled for a bit, do they have quite a bit of oil on them?

 

What happens when you put the choke on?

 

It doesn't sound lean, because if it was it would rev up and just be a plain bitch.

 

Have you taken your carbs apart and cleaned them? Usually when I have a problem with my bike and I know it's fuel related, I always clean my carbs and see if that fixes it (and it usually does)

 

It sounds to me like youre running a little rich, but you seem sure you're not.

 

Do you have a clymer manual or did you read the bhq jetting faq? Theres more info there that might help.

[98TEAM ALBA]

I went to stock needle position and all the way down to a 260 main and a 25 pilot. It still runs like shit when it warms up. I changed plugs and it got even worse. Any Ideas?

[04ShEeLE]

Hey I had what seems to be the same problem. I gave up and took it in to a shop, and it took them a while to get it dialed in. Here is what they ended up doing:

 

310 main jets

30 pilot jets

 

Try it before you knock it. Also make sure the carbs are perfectly syncronized.

 

Hope it works, mine is bad ass now

[98TEAM ALBA]

with a 30 pilot it idles real rough, but with any smaller it has a pop before it gets on the pipe

[98TEAM ALBA]

btt

[04ShEeLE]

a shiny boost bottle solves every problem, from sputtering to faded paint. It's your one stop answer to everything

[pimpeinkc]

if it is falling on it's face when it gets hot, there can only be a few things wrong with it. make sure your fuel lines are not up on any thing to create vapor lock, go and buy a new spark plug boot and switch it out between the two, or if your rich buy two and change them both, about 3 bucks each, lol. as it heats up things expand so check your head torqe and also your carb mounting. make sure every thing is tight. and when you say hot i assume you mean after it is warmed up i start thrashing on it, which means check your reeds, your air filter and your floats/fuel lines. if you can give a description as to, i changed this and i got this problem or it ran fine and out of no where it started fu@king up, that would help figure out the prob. the 2 stroke is the most basic of engines and if the prob came out of no where or it came up after changing some thing is a really big difference. hope to hear from you.