banshee running real bad

[mustang_banshee]

:: I have a 2006 banshee special edition mods are listed.The bike has only 10 hours on it.I installed a full fmf fatty power core 2 exhaust on it and did not jet it.The stock jets are#200 It was running prettygood all through the gears except when i got into4,5,6 then it would bog down and backfire/make popping noise out of exhaust.I've since installed the jets that FMF sent me #260 and now the bike does the same thing but way way worse.At idle if i blip the throttle it just bogs down and shuts off.I am running twin k n airfilters w/no airbox.I live right at sea level and the temp now is between 40to60.Any info would be greatly appreciated.

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sounds like your running real rich , a popping and backfire normally is what i get when i run rich . Have you checked the plugs to see if there dry , wet , oil etc ........ ? Disconect the tors to start ( i have a link below my sig. pic ) . Middle clip on the needle , 1.5 turns out on the screw and try differnt jets..

[mustang_banshee]

sounds like your running real rich , a popping and backfire normally is what i get when i run rich . Have you checked the plugs to see if there dry , wet , oil etc ........ ? Disconect the tors to start ( i have a link below my sig. pic ) . Middle clip on the needle , 1.5 turns out on the screw and try differnt jets..

I'v tried to move needle clip but it seems to work the best in stock position 3rd slot.I've also put in #220 main jets and that seemed to help alot but still at idle when i blip the throttle it just bogs and dies.It will work finne if i leave chock half open

[dajogejr]

Something else is wrong.

Carb slides are backwards, carb bowls are switched, choke tube is missing.

You should be over 300 on the main jet at or near sea level, no air box, pipes and K&N filters.

Or...the TORS isn't completely disconnected.

 

220 or 260 on that bike is lean, trust me. I'd double check the carbs, then TORS...then possibly an air leak.

 

Did you mess with the timing at all?

[mustang_banshee]

Something else is wrong.

Carb slides are backwards, carb bowls are switched, choke tube is missing.

You should be over 300 on the main jet at or near sea level, no air box, pipes and K&N filters.

Or...the TORS isn't completely disconnected.

 

220 or 260 on that bike is lean, trust me. I'd double check the carbs, then TORS...then possibly an air leak.

 

Did you mess with the timing at all?

I'v checked the slides in carb there in right.I've not messed with the timing.Choke tube is on.Cannot figure it out.Talked to FMF and they said #260 would be fine a littlt big if anything.Could i have messed somthing upby running bike for a little while with pipes on it while not jetted?

[06BaNsHeE]

When I got my Cpis I put 280s and it was a little rich and tried 270s and it was perfect.200 My bike wouldve blown up.Try bumping up those mains and if you really dont know what your doing take it to a shop or something but there is definately something wrong if your running 200 with pipes at or near sea level.

[dajogejr]

Define a little while...

 

Also, FMF is full of shit.

You have a problem somewhere else. Any piped and pod filtered shee I've ever worked on was always over 300, I'm in MI...roughly 500 to 800 feet above sea level, normal riding temps 65 to 85 degrees...etc.

 

I've jetted T5s, FMFs, Paul Turner....they all ended up with 320 to 340. What I've found FMF does like is a fatter pilot than stock, normally a 27.5, one up from the stock 25...sometimes they even like a 30.

 

I promise if you leave a 260 in there with pod filters and those pipes you will burn that motor down!!

[Bansh-eman]

I'v checked the slides in carb there in right.I've not messed with the timing.Choke tube is on.Cannot figure it out.Talked to FMF and they said #260 would be fine a littlt big if anything.Could i have messed somthing upby running bike for a little while with pipes on it while not jetted?

im assuming your running stock carbs being its brand new...

 

at about 1000 ft evel with fatties and reeds on stock carbs i was running like a 320 main 27.5 pilot.... your way lean with a 260 for sure... fattin that thing up and start moving down ...

 

always start rich... being rich will foul a plug and cost you 4 bucks... running lean with stick your motor and at the min cost youe new pistons rings and possibly a hone... go the safe route fatin your main and start doing plug chops... go to pep boys you can get a box of NGK BR8ES plugs for like 19 bucks...

[mustang_banshee]

Define a little while...

 

Also, FMF is full of shit.

You have a problem somewhere else. Any piped and pod filtered shee I've ever worked on was always over 300, I'm in MI...roughly 500 to 800 feet above sea level, normal riding temps 65 to 85 degrees...etc.

 

I've jetted T5s, FMFs, Paul Turner....they all ended up with 320 to 340. What I've found FMF does like is a fatter pilot than stock, normally a 27.5, one up from the stock 25...sometimes they even like a 30.

 

I promise if you leave a 260 in there with pod filters and those pipes you will burn that motor down!!

Ok i rode it with the pipes and stock#200 jets for about 3 hours .I will try the bigger jets you suggested,but if i put #260 in it runs worse than #220 any idea why?

[mustang_banshee]

Ok i rode it with the pipes and stock#200 jets for about 3 hours .I will try the bigger jets you suggested,but if i put #260 in it runs worse than #220 any idea why?

Also with the bike running rough it has overheated and will drip a littlt antifreeze out of a vent tube.Could the wrong jet size be the culprit.it doesnt do it very often i thought i was just puttin around to slow in the wods but my 04 banshee can go through the same woods and is just fine

[mustang_banshee]

Define a little while...

 

Also, FMF is full of shit.

You have a problem somewhere else. Any piped and pod filtered shee I've ever worked on was always over 300, I'm in MI...roughly 500 to 800 feet above sea level, normal riding temps 65 to 85 degrees...etc.

 

I've jetted T5s, FMFs, Paul Turner....they all ended up with 320 to 340. What I've found FMF does like is a fatter pilot than stock, normally a 27.5, one up from the stock 25...sometimes they even like a 30.

 

I promise if you leave a 260 in there with pod filters and those pipes you will burn that motor down!!

If i put #320or#340 main jets in what setting for idle air screw should i use also should i move needle clip i would rather not have to do that if i dont have to any input would be great thanks

[dajogejr]

There are three pinned articles on top of the Jetting and Exhaust forum.

They explain what jetting does at different stages in the throttle, etc.

None of us can promise you will or won't have to move your needle...more than likely not, but...if you're gonna do something, do it right.

 

The jetting and carb FAQ are an invaluable learning tool....which you should read first!!

 

[steverb]

take you air box lid off. then see what happens?

[mustang_banshee]

take you air box lid off. then see what happens?

i dont have an airbox im running dual k n airfilters also i put in #330main jets like you guys suggested today and it helped alot but my bike wont stay running unless i turn idle air screw all the way in and back it out 1/2 turn any idea why also with the #330 main jets it still bogs and dies if i WOT at idle???

[olmick]

i ran 320's with my piped, pod, banshee, i think i had the air screw almost 2 turns out, i played with the pilot and put a 27.5 and it was tough to start, so i went back to stock on the pilot jet, but i guess im gonna use the guess and check method again next month when i get my port/rebuild back