ntilehman Posted January 1, 2013 Report Share Posted January 1, 2013 Hey guys, I am going to beat the jetting question to death again in another thread. Nothing I have come up with on here has helped much. Here is what is going on. Bike: FMF Fatty pipes Vforce 3 reeds 105 psi in the cylinders(yes it's low) K&N filter with stock air box vented Conditions: Elevation: 2700ft Temp:45-55 right now Dry air too I thought the bike was loading up on the bottom end. It had a bad bog if you gassed it hard. So we took out the main to see what is was, a 260. We then put in a 250 and lowered the needle and picked up the idle. This made the bike run like crap. It would hesitate bad and have no power. Took the tops back off and raised the needle two clips. This cleaned up a lot of the part throttle hesitation. So we thought it needed more fuel all around. Put in some 280's and now you are lucky to get it started without the choke on. Has the same huge bog on the bottom. The top screams though. I need some help here. I thought a 280 on a basically stock bike was way to much up here at our elevation. I guess the 260's are going to go back in and just be happy with that. Get the motor rebuilt too. New plugs were also put in. Ran it wide open on the 280's down the road and the only carbon on the plug was on the ground electrode. Help me out here fellas. Quote Link to comment Share on other sites More sharing options...
hp2000 Posted January 1, 2013 Report Share Posted January 1, 2013 Carb slides in their correct side ? Quote Link to comment Share on other sites More sharing options...
Sandking Posted January 1, 2013 Report Share Posted January 1, 2013 Make sure floats are adjusted properly, good plug caps, cross over tube is there, carb slides arent switched. Sync carbs. Clean air filter. Just some ideas Quote Link to comment Share on other sites More sharing options...
ntilehman Posted January 1, 2013 Author Report Share Posted January 1, 2013 Clean air filter, slides in correct carb. sync'd up. It almost gasps if its at idle, when it runs, and you stab the throttle. Air screws out to far? i'm pretty sure they are at 1.5-2 turns Quote Link to comment Share on other sites More sharing options...
hp2000 Posted January 1, 2013 Report Share Posted January 1, 2013 Clean outerwears ? Quote Link to comment Share on other sites More sharing options...
ntilehman Posted January 1, 2013 Author Report Share Posted January 1, 2013 I don't run them. I just clean the filter after every ride. Just went and messed with the air screws to try and get the off idle right. Still won't run off the choke at all. Looks like I'm waiting until tomorrow for the local banshee guru. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted January 1, 2013 Report Share Posted January 1, 2013 Stock needle all the way rich make sure carbs are synced,260,270 at that elev with 27.5 pilot,make sure plug caps are ohmed out properly but no matter how you slice it comp is low Quote Link to comment Share on other sites More sharing options...
ntilehman Posted January 1, 2013 Author Report Share Posted January 1, 2013 Yea i know the comp is bad. Still ran ok in the top. It wasn't blistering fast but it ran with most stuff. It wasn't doing this before the jets were messed with. I couldn't see it being the caps. Hopefully I hear back from my buddy today. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted January 1, 2013 Report Share Posted January 1, 2013 So I'm missing something then why would mess with it if it was running fine there is not much going on in a banshee,compression ,spark,fuel,if the bike ran good b4 now it doesn't and jetting didn't change something else is wrong Quote Link to comment Share on other sites More sharing options...
ntilehman Posted January 1, 2013 Author Report Share Posted January 1, 2013 it ran ok. Not great but ok. I was trying to get the little bugs out of it in the bottom. Today I am more than likely going to put the org stuff back in and just ride it that way. Quote Link to comment Share on other sites More sharing options...
lms1977 Posted January 1, 2013 Report Share Posted January 1, 2013 As sleeper said check the plug caps or just trim the wires and put new ones on put 27.5 pilots with 260-280 mains in and richen the needles.. more than likely its more than just jetting if it was good before you messed with it. Or just put it back to where you had it Quote Link to comment Share on other sites More sharing options...
ntilehman Posted January 1, 2013 Author Report Share Posted January 1, 2013 Yea. well I found a small crack in the choke tube. Put in a new piece of tubing and what do ya know, it runs. Seems like it winds out much quicker now. all the way to the limiter. i dont really remember it doing that before. This is still with the 280's in. The bottom has a long drawn out hesitation if its under a load. airscrew's fix this? 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.