engine size?

[canalcat]

To be clear! My compression head bolts are 5/16=8mm. Spaced at 1 3/4" apart . Is this 66cc or 48 cc? I'm not a math person Thx Anyone

 

[MotorBicycleRacing]

To be clear! My compression head bolts are 5/16=8mm. Spaced at 1 3/4" apart . Is this 66cc or 48 cc? I'm not a math person Thx Anyone

You already asked this question so the answer is clearly unchanged.

If you have 8 mm head studs it's a 66 cc for sure because no 48 cc motors use 8 mm head studs and yes 1 3/4" is right.

Did you pull the head off or remove the nuts?

 

[Large Filipino]

As far as stock heads go,the consensus is that the 66cc engine has 11 fins and the 48cc has 12 fins.
Hope this helps.

 

[MotorBicycleRacing]

Same answers.......

http://www.motoredbikes.com/showthread.php?45107-Engine

 

[canalcat]

Neither ,I'm considering a up grade ,compression head. Any suggestions MBR? I don't want to spend to much! THX .

 

[MotorBicycleRacing]

Neither ,I'm considering a up grade ,compression head. Any suggestions MBR? I don't want to spend to much! THX .

Best heads and made in the USA.
Only $39.95

http://shop.crmachine.com/product.sc?productId=48&categoryId=15