Another Jackpiner Jetting/Carb Question

[holeshothawk3]

I have a recently acquired 1972 Jackpiner that has a bad problem with loading up when at idle. Carb is a Bing 2/30/101. Jetting is as follows:
Pilot: 30
Main: 150
Needle Jet: 2.76
Jet Needle: 6G1 1 position above the bottom
Slide: not sure but has a "B" stamped in the bottom
Air Idle Screw: 2.5 turns out
I did check the float level and it is spot on it appears. Needle and needle jet are supposed to be new. The slide does show a slight bit of wear. Motor is pretty fresh and has a slight bit of porting done. The bike runs fantastic and clean once it comes off the bottom. Any suggestions would be a great help!

[firstturn]

Did you blow out all the holes in the Carburetor?  Did you try adjusting the air screw?  

Jet Needle: 6G1 1 position above the bottom?  Do you mean one position on the bottom of the needle jet as in making it rich?

Ron Carbaugh

[holeshothawk3]

Yes one position above the very bottom clip, on the richer side of the needle. Yes everything is clean.

[firstturn]

I would start in the center.  Check your slide for a smile on it as a lot of time that is the problem.  Also be sure the needle and jet are new.

Ron Carbaugh

[skiracer]

Or, you can save yourself alot of time and energy, and buy a real carb!  Yes, the Bing came on your bike, but, over the past 50 years technology has come a long way.....

1976 250 MC5 Original Owner
1976 Penton 175 XC

[Bob Gilman]

Clint,send me your email address