back firing

[scblaster]

okay i've tried to adjust my air screw and I'm still fouling plugs I have vforce reed 3 cage and toomey b1 full exhaust I 've removed the tors and now the bike will start and won't stay running with out giving it some throtle and then it back fires and idles for a secvond then cuts off . If you go for a ride it runs fine for about 10 mins then starts to bog down any ideas the air screw is set about 1 1/2 out

 

[01 fmf blaster]

did u jet after the mods

 

[scblaster]

no could this be the prob and if so what size jetts and type would you all recomend

 

[liljatownboy]

around 280

 

[scblaster]

thanxs

 

[Ready2rev]

I have the toomey pipe, boysen reeds, with air box lid off and im running a 270 main jet w/ air screw 3/4's of a turn out. works perfect with my setup.I:I

 

[scblaster]

okay now i've got a 270 mainjet and it won't start at all now any advice maybe an airleak but I can't seem to find one maybe the gas mix 32 to 1 any ideas I'm open to anything

 

[2smoker85]

i mix at 32:1, is it the stock carb? check your reeds, see if they are broken or cracked, this will do it too, it happened to me,

 

[scblaster]

stock carb., checked reeds everything good could it possibly be the cold weather made a kind of whistle noise when I went to start it to

 

[Mrbrocco]

did you check the plug? and might be cold weather but..... thats just initially warming it up it will take like 10-20 kicks depending and did you adjust your idle screw/air screw?

 

[scblaster]

plug is brand new and i kicked easily 20 times I messed with the air screw but not sure if the one I'm turning is the right one the one on top of the tors sorry if I sound a little ignorant

 

[liljatownboy]

check for spark then check your reed check your fuel flow then check compresion.

 

[scblaster]

what about tors wires i've disconnected but all the wires are still there i got spark reeds are good fuel flow good and do not know how to check compression

 

[scblaster]

but it diffintly feels like it has compresion

 

[liljatownboy]

may need a carb clean

 

[scblaster]

carb just cleaned

 

[scblaster]

nothing bout the wires off the tors

 

[liljatownboy]

if your getting spark it cant be that unless its weak spark try to hit it with some staring fluid. if i runs on that then cuts off its not getting fuel (carb problem)

 

[scblaster]

thanks lets hope its not a carb prop

 

[Vootie]

plug is brand new and i kicked easily 20 times I messed with the air screw but not sure if the one I'm turning is the right one the one on top of the tors sorry if I sound a little ignorant

The screw on top of the tors is your idle adjustment. The air screw is on the choke side of the carb. It is a little brass flat head screw. This is the the screw that should be 1 to 2 turns out.