Ladle58 Posted December 29, 2018 Report Share Posted December 29, 2018 Does any one know what size main Jet you should run on a stock banshee at 700 feet and 20 degrees Fahrenheit Quote Link to comment Share on other sites More sharing options...
97Screamer Posted December 29, 2018 Report Share Posted December 29, 2018 If your bike is truly all stock I'm going to say stock jetting 200/25. The temp and elevation should just about cancel each other out, maybe a touch lean. You could go 210 on the main if the plugs look lean and adjust the air screw. Quote Link to comment Share on other sites More sharing options...
Ladle58 Posted December 29, 2018 Author Report Share Posted December 29, 2018 I was thinking maybe 280 with the cold temp. Isn't 210 about stock size? Quote Link to comment Share on other sites More sharing options...
97Screamer Posted December 29, 2018 Report Share Posted December 29, 2018 200 is stock. 280 sounds very rich to me unless you have exhaust and/or have removed your airbox. I'm assuming this is not the case since you said your bike was stock. A rule of thumb is one size on the main for every 30F on a stock bike. That would put you at 215-220. With the elevation that's where I came up with 210. If you wanted to be safe 220 would be a good starting point. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted December 29, 2018 Report Share Posted December 29, 2018 I would start with 280 or 290.. Remember, it's cold as fuck.. Don't burn it down. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted December 29, 2018 Report Share Posted December 29, 2018 2 hours ago, 97Screamer said: 200 is stock. 280 sounds very rich to me unless you have exhaust and/or have removed your airbox. I'm assuming this is not the case since you said your bike was stock. A rule of thumb is one size on the main for every 30F on a stock bike. That would put you at 215-220. With the elevation that's where I came up with 210. If you wanted to be safe 220 would be a good starting point. You're confused.. Stock jets go 200, 210, 220, 230..... Quote Link to comment Share on other sites More sharing options...
97Screamer Posted December 30, 2018 Report Share Posted December 30, 2018 280 on a bone stock bike? I'd be very surprised if thats the case. I don't even change my jets going from ~75 during the day to ~40 at night, 20F is not that cold. I'm not confused even though my post may have been confusing. The 215 was from a mathematical standpoint, I recommended the 210 because of elevation and 220 to be safe. If he needs a 280 the bike is either not stock or has an air leak imo. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted December 30, 2018 Report Share Posted December 30, 2018 59 minutes ago, 97Screamer said: 280 on a bone stock bike? I'd be very surprised if thats the case. I don't even change my jets going from ~75 during the day to ~40 at night, 20F is not that cold. I'm not confused even though my post may have been confusing. The 215 was from a mathematical standpoint, I recommended the 210 because of elevation and 220 to be safe. If he needs a 280 the bike is either not stock or has an air leak imo. Let him him burn it down then... Mathematically, that's what's bound to happen. Quote Link to comment Share on other sites More sharing options...
97Screamer Posted December 30, 2018 Report Share Posted December 30, 2018 Lol, I'd like to see that equation. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted December 30, 2018 Report Share Posted December 30, 2018 I'd rather see him play it safe.. Will 280 be too rich? Probably. If it's 20 degrees and he takes it out with a 220 and does some long ass pulls with it, I bet it won't live. I'd rather see him start high and work his way back down than blow the thing up first time out. I've never blown anything up having too much fuel.. Not enough fuel is a different story. Quote Link to comment Share on other sites More sharing options...
97Screamer Posted December 30, 2018 Report Share Posted December 30, 2018 Fair enough. Quote Link to comment Share on other sites More sharing options...
Ladle58 Posted December 30, 2018 Author Report Share Posted December 30, 2018 Thanks for the clarity guys. 🤣😂🤣 Quote Link to comment Share on other sites More sharing options...
Ladle58 Posted December 30, 2018 Author Report Share Posted December 30, 2018 Yeah. 20F is cold as F. And actually it's about 10F right now. Thanks for sharing thoughts. Taking into account all info, I feel I have to run at least 240 to be safe. I'll see what I have on hand. There has to be a chart out there somewhere that has starting points for jet sizes taking into account all variables. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted December 30, 2018 Report Share Posted December 30, 2018 There’s no chart for anything. Every motor is different. Start high and work down to avoid a big problem. Quote Link to comment Share on other sites More sharing options...
97Screamer Posted December 30, 2018 Report Share Posted December 30, 2018 Tyler is right, there is no chart and every engine is different. Take your best guess on the safe side and read your plugs like the rest of us. Quote Link to comment Share on other sites More sharing options...
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