[hawk-trx]

a buddy got his carb back from serdrum this week and i measured it last night, so now im wondering where and how the bore is measured.

the cag was going to be bored to 42mm

the back of the carb (air filter side) measures almost 44mm (43.97)
the front of the carb measures 42.98mm

i didnt have anything with me to measure the center ring

so how is a tapper bored carb measured?

 

[stevefarris]

a buddy got his carb back from serdrum this week and i measured it last night, so now im wondering where and how the bore is measured.

the cag was going to be bored to 42mm

the back of the carb (air filter side) measures almost 44mm (43.97)
the front of the carb measures 42.98mm

i didnt have anything with me to measure the center ring

so how is a tapper bored carb measured?[/b]

Funny you ask this because I just got mine back from sredrum as well. Mine measured 42.65 on the front and 44.45 on the filter side. I was wondering the same thing.

 

[jwilson84]

Carb bore size 42mm should be 42mm on the inside side of the carb then its tapered out bigger to ur intake and then bored to match the head side...

in order togo bigger on inside u need a new bille center piece (which im sure u guys know)..

its all about the inside of the carb by the slide..even a 39mm or a 44 mm can have the same size openings on the intake and head side as a 42mm ..

catch my drift..lol

 

[miller]

so how is a tapper bored carb measured?[/b]

the center is where it is measured, most carbs have a slightly smaller center to give it a venturi effect, so it should be around 42 at the center ring

 

[hawk-trx]

i thought that was how it was measured but i didnt know for sure.
and i didnt have anything with me to measure it so i couldnt even check.

thanks for the help