PDA

View Full Version : Where is the a/f screw....


stuntman_12
10-09-2006, 08:20 AM
I'm putting a 450R carb on my 416 ex, I haven't heard this motor run yet. I'm having some jetting issues. First, where is the air/fuel mixture screw, what is the stock jetting on this carb? Now i have a 48 pilot, 118 mian, and the needle is set in the third or middle clip position....
Jonas
10-09-2006, 08:39 AM
What year bike is it off of or which style carb is it?
stuntman_12
10-09-2006, 11:02 PM
05' carb, 42mm.. that's about all i know...
stuntman_12
10-10-2006, 03:07 PM
It's a 05 keinith... somethin like that.... ttt
ghott
10-10-2006, 03:22 PM
Yes, the 04/05' machines use a 42mm Keihin.

Stock jetting is 118 main, 48 pilot, 3rd clip on stock needle and A/F Screw 2 turns out.

The Air/Fuel mixture screw is located on the bottom of the carb, and is a brass colored flat type screw. I included a picture, the screw is circled in red.

Adjusting the mixture screw out richens the pilot/slow circuit, turning the mixture screw in leans the pilot/slow circuit.
beany
10-10-2006, 03:48 PM
Are theses D-shaped on the '06 models? Or is it that I can't see it correctly wile the carb is still on?
ghott
10-10-2006, 03:57 PM
I'm not familiar with the 06/07 models. I know they use a different style carb: 40mm Keihin FCR.

The shape of the A/F screw on the 04/05 is circular with a straight groove thru the center for a flat type screw driver, not "D" shaped.
Chino886
10-10-2006, 05:04 PM
Originally posted by beany
Are theses D-shaped on the '06 models? Or is it that I can't see it correctly wile the carb is still on?

Yes it is D-shaped...it is a PITA! :mad:
schootar
10-10-2006, 05:10 PM
Originally posted by beany
Are theses D-shaped on the '06 models? Or is it that I can't see it correctly wile the carb is still on?

The "D" shaped screw is on the 06/07 FCR. They are a pain to get to without turning the carb some. A few companies make new screws that make adjustment easier. I plan on getting one in the future for mine.