Sheeny350 Posted February 20, 2012 Report Share Posted February 20, 2012 I just picked up a banshee last week and ive been in the process of tearing it down and fixing it up. the guy didn't seem to know much about it, from what i can tell it has a pro circuit platinum exhaust, +4 degree key, knn filter, reed spacers, torrs removed and a boost bottle. My problem is that the bike seemed to run rich when i got it and the plugs confirmed that. After i took the carbs apart it only has a 200 main jet with a 25 pilot and the needle on the third clip, plus the air screws look like they are turned way out. the choke tube also was disconnected when I checked. the main seems way to small to me, would having the tube disconnected make it run rich and do you think he jetted it down to a 200main because of that? I think I Should at least be at a 280main. Any advice is appreciated because I wanna ride this thing! Heres what I plan to be running pro circuit pipes +4 degree key reed spacers boost bottle might buy a cfm open air box because mine is cracked and doesn't seal for shit 32:1 mix 2000-2700 altitude Quote Link to comment Share on other sites More sharing options...
dcalsv02 Posted February 20, 2012 Report Share Posted February 20, 2012 I just picked up a banshee last week and ive been in the process of tearing it down and fixing it up. the guy didn't seem to know much about it, from what i can tell it has a pro circuit platinum exhaust, +4 degree key, knn filter, reed spacers, torrs removed and a boost bottle. My problem is that the bike seemed to run rich when i got it and the plugs confirmed that. After i took the carbs apart it only has a 200 main jet with a 25 pilot and the needle on the third clip, plus the air screws look like they are turned way out. the choke tube also was disconnected when I checked. the main seems way to small to me, would having the tube disconnected make it run rich and do you think he jetted it down to a 200main because of that? I think I Should at least be at a 280main. Any advice is appreciated because I wanna ride this thing! Heres what I plan to be running pro circuit pipes +4 degree key reed spacers boost bottle might buy a cfm open air box because mine is cracked and doesn't seal for shit 32:1 mix 2000-2700 altitude I wouldnt waste your money on reed spacers. They dont do anything. I would look up the jetting specs for stock and put it back to there and use that as your base. what type of riding are you doing? If you are duning, i would get rid of the air box completely and use two pods. Quote Link to comment Share on other sites More sharing options...
Sheeny350 Posted February 20, 2012 Author Report Share Posted February 20, 2012 I wouldnt waste your money on reed spacers. They dont do anything. I would look up the jetting specs for stock and put it back to there and use that as your base. what type of riding are you doing? If you are duning, i would get rid of the air box completely and use two pods. I didnt buy the reed spacers they came on it. I ride in the woods but our trails are pretty wide open and I cant get rid of an airbox because there is just to much water and mud around here. Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted February 21, 2012 Report Share Posted February 21, 2012 I'd drop the boost bottle also if I were you Quote Link to comment Share on other sites More sharing options...
dcalsv02 Posted February 21, 2012 Report Share Posted February 21, 2012 Save up money for some port work. thats where you will get your power from. What year is your banshee? Quote Link to comment Share on other sites More sharing options...
Sheeny350 Posted February 21, 2012 Author Report Share Posted February 21, 2012 im not worried about the power right now lol, im coming from a 09 YFZ450R and the Banshee would still smoke it. I just need to know if the choke tube being off would cause a rich condition and the guy before me leaned it out because of that. should I go buy a bigger jet size tomorrow. the jetting calculator put me around a 310 main......its a 2003 also Quote Link to comment Share on other sites More sharing options...
dcalsv02 Posted February 21, 2012 Report Share Posted February 21, 2012 I would recommend getting yourself a clymer's manual and buying a few different jet sizes around what you think you will need. if you say 310, get 270-330. Shouldnt need more than that. turn your fuel screws in all the way and back out 1.5 turns. put the cross over tube back in. check and see what size the pilot jet is. Quote Link to comment Share on other sites More sharing options...
Poolman Posted February 21, 2012 Report Share Posted February 21, 2012 It doesn't sound like the previous owner did anything jetting wise. The Banshee comes stock with 200 mains and a 25 pilot. My Bike is setup very similiar to yours, i.e. same pipes, +4 timing, K&N performance air filter, and its ported. I'm running 260 mains which I do plan to bump to 280 mains and right now a 25 pilot which I plan on bumping to a 27.5 pilot. I don't know if not having the choke tube attached makes the Banshee run any richer but it would seem if your bike pulls real hard through all the gears on wot that it is running richer because the jetting is stock. Do like the previous advisor suggested with your air screws, connect your choke tube, and definately rejet to at least a 260 main and 27.5 pilot. Quote Link to comment Share on other sites More sharing options...
Sheeny350 Posted February 21, 2012 Author Report Share Posted February 21, 2012 ok, im gonna pick up some different jets tomorrow and hopefully they will have 27.5 pilots in stock too. I guess running without the tube connected does richen it up because it would also start in 25 degree weather without the choke first kick and the plugs are pretty black. Thanks for the help, ill post my results. Quote Link to comment Share on other sites More sharing options...
Sheeny350 Posted February 21, 2012 Author Report Share Posted February 21, 2012 After reading up on some more posts, the guy had the carb slides in backwards also ... the slanted "half moon" part of the slide is facing towards the engine . Quote Link to comment Share on other sites More sharing options...
Poolman Posted February 21, 2012 Report Share Posted February 21, 2012 After reading up on some more posts, the guy had the carb slides in backwards also ... the slanted "half moon" part of the slide is facing towards the engine . Beautiful, Well at least the Bike belongs in the hands of someone who cares now. you will get it right, just take your time even if you just work on the bike maybe 2 to 3 hours a day until your happy. That's what I do and I find it a fun hobby maintaining and riding. Quote Link to comment Share on other sites More sharing options...
Sheeny350 Posted March 3, 2012 Author Report Share Posted March 3, 2012 Well I finally got it all back together and i did end up getting a cfm air box. it runs good but it feels like it doesn't have any power on the top end and the plugs are not really getting any color, if anything possibly a little gray. Im running a 310 main right now and all i have thats bigger is a 320. im going put in the 320 but im guessing ill have to order a 330 and 340. Heres a picture of it when i got it and now that its almost done. Quote Link to comment Share on other sites More sharing options...
dcalsv02 Posted March 3, 2012 Report Share Posted March 3, 2012 It lean. You need to put in bigger jets. White plugs are bad. when its at an idle in neutral, if you blip the throttle does the motor drop right back down to an idle or does it stay revved up? Quote Link to comment Share on other sites More sharing options...
Sheeny350 Posted March 4, 2012 Author Report Share Posted March 4, 2012 It lean. You need to put in bigger jets. White plugs are bad. when its at an idle in neutral, if you blip the throttle does the motor drop right back down to an idle or does it stay revved up? I already ordered 330 up to 350 hopefully they will be big enough. I wasn't really paying attention but I didn't notice any hanging rpm at all. it would run great but as soon as you got about a little above half way through the rpm range it would just crap out and stop building rpm. after another run one plug was ever so slightly tinted brown so im thinking a 340 should be about spot on. (I hope) Quote Link to comment Share on other sites More sharing options...
blackshee03 Posted March 9, 2012 Report Share Posted March 9, 2012 Without the choke tube to the right side it will cause the right to be lean. With those mods an stock jets im surprised the top end didn have a melt down Quote Link to comment Share on other sites More sharing options...
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