Question

[bansheecrazy]

Curious if some one can help me?

My shee has bee acting up for a while finally blew the top end. I went out and found a used set of cylender ported by LRD, with pistons decent ssetup. had 110 compresion. I get it all together and still having issues. It seems with new plugs it hauls fir about 2 minutes then starts fauling, but sometime when I am at topend it runs decent but I think could be better. but bottom end flat out suck it like gurgles, I think that i am to rich but dont want to burnup my cylenders again, I am at 6000 ft altitude and have vforce, fmf pipes, advanced 4 degrees, K&N, and porting done I am at 300 on my main jet, any opinions would be great ly appreciated. I was going to try to goto a 290 but then my neighbor said to put the 300 back in and check for a air leak, I will do that for now. I was told get the bike running then spray carb cleaner and the bike should react if there is a air leak. would appreciate any help I can get take care all.

Keith

[Banshee~]

Curious if some one can help me?

My shee has bee acting up for a while finally blew the top end. I went out and found a used set of cylender ported by LRD, with pistons decent ssetup. had 110 compresion. I get it all together and still having issues. It seems with new plugs it hauls fir about 2 minutes then starts fauling, but sometime when I am at topend it runs decent but I think could be better. but bottom end flat out suck it like gurgles, I think that i am to rich but dont want to burnup my cylenders again, I am at 6000 ft altitude and have vforce, fmf pipes, advanced 4 degrees, K&N, and porting done I am at 300 on my main jet, any opinions would be great ly appreciated. I was going to try to goto a 290 but then my neighbor said to put the 300 back in and check for a air leak, I will do that for now. I was told get the bike running then spray carb cleaner and the bike should react if there is a air leak. would appreciate any help I can get take care all.

Keith

402784[/snapback]

Is your airbox lid or snorkel off? What size domes are you running? The 300 main sounds about right for the lid off. What pilot, needle clip, are you running? Take it down the road in 4th, pin it and pull the choke out half way. If it runs better your lean. Go ahead and spary some carb cleaner around all the boots and your cross over tube and see what happens.

[bansheecrazy]

No airbox top or bottom wide open, running 18 on the domes, it is on the 4th clip but havnt tried the choke half way out for testing purposes I will try that next I appreciate the quick responce. thanks keith

I have been pretty frusted with this bike I am not much of a mechanic I was and possibly still thinking of going 4 stroke But the thing is when the banshee is running good it is so bad A$$, would be hard to give up, but the new raptor will be fuel injected. hard decisions to make. Hope I get this running good before it hits the floors

I let you knowo thanks keith

[Banshee~]

No airbox top or bottom wide open, running 18 on the domes, it is on the 4th clip but havnt tried the choke half way out for testing purposes I will try that next I appreciate the quick responce. thanks keith

I have been pretty frusted with this bike I am not much of a mechanic I was and possibly still thinking of going 4 stroke But the thing is when the banshee is running good it is so bad A$$, would be hard to give up, but the new raptor will be fuel injected. hard decisions to make. Hope I get  this running good before it hits the floors

I let you knowo thanks keith

402796[/snapback]

You compression looks a little low, do you know what kind of portwork was done on the clyinders? Clean your filters real good and then try a 320 main jet, 27.5 pilots, stock clip postion, and the airscrews turned out 1.5 turns from seated. After you get that done, start it and dial in your airscrews. Let it idle for twenty seconds between changes. Start from 1.5 turns out and your looking for a crisp response from idle-1/8 trottle. Ones that is dialed in take it up the road pinned and see if its running better. If its bogging it rich if not try the choke trick (pull the choke out half way while your at WOT and if it bogs your rich or perfect on your mains/ if it runs better your lean on your mains). Do that until your main jet is dialed in, because if you dial in something at 1/2 trottle and then you change your mains it might screw that setting up.

[bansheecrazy]

dah one thing I forgot to mention before is that it is backfiring at a low tone not loud, but consistant through out the powerband. also another thing that I will have to rectify is the gas that is in there is about 2 months old from when the top end originally wen. Also now it seems that I have to give it gas during kicking never had to do that before, maybe that is because the plugs are fauled not sure. I will have to get new gas and new plug before I do any testing right. Curious what should the compression be around.

Thanks keith

Edited August 9, 2005 by bansheecrazy

[bigwill]

with 18cc domes you should be over 165lbs and using race gas for the compression-try a hone and new rings or bore to next size

[Banshee~]

with 18cc domes you should be over 165lbs and using race gas for the compression-try a hone and new rings or bore to next size

402859[/snapback]

He is at 6000 ft and has some kind of port work, so im thinking around 130? If its backfiring could mean you lean, but I would drain your gas tank, clean your carbs, change the plugs, and get some new gas. You might as well put in the new jets while your carbs are off.

[bansheecrazy]

well changed the gas and found a small air leak with the air screw. sealed that and am running super gas. 91 octain with octain booster. Still boging in the take off good throughout the gears and top end boggs a little what can that be. Also am thinking maybe I should re ring the cylynders, only thing is dont knnow where to get rings only at for proX pistons. are rings universal?? thanks for teh help, keep up the suggestions greatly appreciated. keith

[Banshee~]

Try a 290 main jet and mess with the airscrews.

 

I got this off of Banshee Jetting Faq

 

Start by adjusting the airscrews; on each carb turn them in (clockwise; which is richer) a half turn (180 degrees); adjust both airscrews the same amount. If you have the motor idling allow about 20 seconds for the motor to react to the new setting. If the condition gets worse, try going out (counterclockwise; which is leaner) on the airscrews and see if it improves. If going in on the airscrews helps but the problem persists after you turn the airscrews all the way in, or to within a half turn out from seated (don't torque the airscrews! the tip is pointed and overtightening them can cause damage!), try the next size larger pilot jet, and start over with the airscrews 1.5 turns out; tune the airscrews from there to get a clean idle and off-idle response. Conversely, if going out on the airscrews helps but the problem persists after you get to about 3 turns out from seated, try the next size smaller pilot jet and start over with the airscrews 1.5 turns out; tune the airscrews from there to get a clean idle and off-idle response. Once you acheive a clean idle and crisp off-idle response (no bog or hesitation right off idle), you may need to adjust the idle speed up or down by adjusting the idle screws. If airscrew adjustment does not have any affect on the bog or hesitation, and you are certain the problem is below about 1/4 throttle, check the carb sync, make sure the pilots aren't clogged (it only takes a speck of dirt to block the tiny passage), and insure that both airscrews are set the same number of turns out from seated.

[bansheecrazy]

well here is my latest situation.

I noticed while sitting at my neighbors house. that while idling, the right side heats up more and allot quicker. he thinks it may be a top end. So to delete some posibilties I put in new plugs and swaped the spark plug cables and still the right side heats up quicker. any suggestions. the carbs looks sycked from look through the air box area, not sure very confused any idea.

Thanks for the suggestions.

Keith