the g1 Posted January 5, 2014 Report Share Posted January 5, 2014 Hey Guys I just bought my first banshee and need some help with jetting. Banshee motor is a 4mil stroker with 21mil domed heads. The carbs are Keihin. I measures the intake side of the carb and it measures 35mm "not the filter side". The main jet now is 135, pilot 55, and the needle is CE G with the clip in the second groove from the top. There are 2 K&N filters with no air box. I would like to have a set for 30 degrees and 70 degrees. My elevation is 610. Thanks, Mike Quote Link to comment Share on other sites More sharing options...
the g1 Posted January 5, 2014 Author Report Share Posted January 5, 2014 I forgot it has T5 exhaust. Quote Link to comment Share on other sites More sharing options...
dave5.0 Posted January 5, 2014 Report Share Posted January 5, 2014 Nobody is going to be how to tell you exactly what jets need to be in it. Just get you in the ballpark. Have you used the search feature on this site and looked over the thousand different topics about jetting yet? There's a stickied topic about what setups guys have and what jets they out in them. You can go through that and see where other people ended up as compared to yours. Is it ported? Sounds like the main is possibly little small and the pilot maybe lil too big. Quote Link to comment Share on other sites More sharing options...
the g1 Posted January 5, 2014 Author Report Share Posted January 5, 2014 I looked and it seems like 48pilot and 150-155main is common for a similar setup. Quote Link to comment Share on other sites More sharing options...
bluebanshee98 Posted January 5, 2014 Report Share Posted January 5, 2014 Ok then try those jets and check the plugs. See how it runs Quote Link to comment Share on other sites More sharing options...
dave5.0 Posted January 5, 2014 Report Share Posted January 5, 2014 Try this. I just posted it in a couple other threads. The jet sizes are gonna be different for your keihins. The sizes you just posted are close. I'd go up a few sizes on the main from what you've listed to try what I posted below. Maybe a 165 or so. I just jetted one here while back with pipes and reeds. Ended up with a 30 pilot. If you have the screw all the way in it wants more fuel. That 25 is a stock jet. Probably gonna end up 1-2 sizes bigger atleast. I usually adjust a pilot by idle speed. If you have the right pilots in there you should be able to set an idle, then adjust the screws evenly 1/4 turn or so at a time until you get the highest idle. If you go in more than I think 1-1/2 a turn pilot is prob too small. If you go more than 2 1/2-3 out its prob too big. Once you get that ironed out move to the needle. Go all the way to the bottom with the clip on the needle. If its the right needle and the pilot is right it should idle fine and then stumble when you rev it. So come up the needle one clip position at a time until it clears out. Once that's clean put some big ass mains in it. Maybe 330-40. Hopefully it'll stumble on the top end. If so its big enough. Then come down one size at a time until it clears out on top. Once there run it through the gears to 5-6th. While wide open kill it and pull the clutch at the same time. Then Look at your plugs. Ideal is gonna be chocolate brown. This way isn't the most horsepower per say but it should run good and be safe. The motor will last this way. You can make more power possibly being on the edge of lean but I'm gonna assume you're just riding it like most of us are. The way I lined you out is a way to keep it going for a while and you won't have to worry if its gonna grenade because its too lean. I've never done any plug chops like a bunch of guys are gonna tell you to do. I haven't melted one down in a long time. Plug chops seem like a waste of a new plug to me. Especially of you aren't chasing any records. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted January 8, 2014 Report Share Posted January 8, 2014 I would find out compression first what kind of fuel are you running? Any way start off 48 pilot 160 main cel 4th clip, is it ported? Quote Link to comment Share on other sites More sharing options...
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