Box Stock

carb bore

J

jake17j

Member
what's the max you can bore out a clone carb before you run out of material. looking to build an s/a clone for a grasscar type mini late model
 
If it is a 6.5hp clone..700 venture if you know how to do it and like to gamble...
If not... to be safe .670-.685...be carful...
 
Boring a clone carb to the above mention bore needs to be done carefully at an offset from the center. If you don't you will end up breaching into the fuel circuitry pathways rendering the carb into junk. I would recommend going to a Dover or Nr racing carb because they have done all the trial and error work and know what works best. Really from a economic standpoint.
 
There is not much meat on the idle passage side and on the top side. Like said above around .670 you better be careful. What I have done is cut some out of the bottom and the right side before I start boring it. Then I'll straighten it up with a reamer. It has helped me gain some.
 
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