Poor man's carb sync

[bossboy302]

It runs so good I thought I'd share...

Completely rebuilt carbs-ultra-sonic cleaning, new guts, the whole bit.
Don't have a sync tool, so I loosened the slide adjuster nuts and selected a drill bit that could just fit in the gap between the bore and slide. Adjusted all to same drill bit. Can not believe how smoothly it runs! The air correction screws close to 3/4 turn out, idle speed right at 1100.
(and yes, I finally got the f$%&*g air box on).
All in all, very pleased.

 

[brettp]

Nicely done!

 

[1974Honda750]

Thanks, do you recall what size bit you used ?

 

[bossboy302]

Sorry, I don't. Think it was down around 1/8-3/16".
But the absolute size isn't as important as getting them all equal. Once they all match, you can raise or lower all together with the idle screw.

 

[1974Honda750]

Thanks , all good points.
Lee

 

[brettp]

Bench sync will get you 80-90% there. But need sync tool to do the rest.