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Jetting Help


WillWater

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Hi there, I am a new to the forum and just purchased a bone stock 2006 banshee in basically showroom new condition. Probably paid a little much for it, but I figure it was not something that is going to get any easier to find. Anyways, I am in the middle of putting T-5's with Toomey Silencers on it and the kit came with air filter and jetting. I really do not want to run the airbox and Foam air filter that Toomey supplied. This is going to be purely an Oregon dunes bike and don't want to screw with having to clean a foam filter everytime I want to ride the banshee. Not to mention I really don't feel like drilling a piss load of holes in my stock air box, just to get enough air into it. I instead ordered a set seperate K+N's that clamp right to the carb inlets and have outerwears. This set-up is pretty much what everyone used to run on the dunes and seems to work fine. My question is will this affect how I should jet the bike. The largest jet Toomey sent me is a 280 which they claim is for sea level to 2500ft. The bike will be ridden at sea level all the time and in all temperatures. In the winter I may go get a one size larger jet just to deal with the temp difference, since I am guessing that Toomey assumes that everyone is in So-Cal. Normally I would just jet the bike and go try it out until I like the way it runs, but considering it seems to be a couple of hour ordeal to get the carbs out on this thing I would rather get it right the first time.

 

Thanks in advance.

 

Allen

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Thanks man, I will go see if I can find any 300's locally and give them a try first. Based on Toomey's documentation it seemed like I was going to be on the lean side of things with 280's. I can jet my yz 250 in about 5 minutes, not sure I will ever get the banshee down to 20 minutes but I garuntee it will get alot easier when those damn TORs things go away when I switch to twist throttle.

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Good call on the 300's, they are damn close. Here is some pics of a plug chop I did today. I have been a dirt bike guys for 20 years and have never even heard of a plug chop until I got on this site, and have never blown a motor, just jetted by feel. With dunes banshees tendency to grenade motors I figured it was worth a try. This chop was taken at 250ft elevation on the road in front of my shop. I am thinking it might be just a hair lean for my liking. I want the banshee to be absolutely idiot proof even if it means a small performance drop. What do you guys think.

 

IMG_3780.jpg

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