needed hardware for bigger carburetors

Discussion in 'Spare Parts, Tools & Product Developement' started by jaguar, Apr 13, 2013.

  1. jaguar

    jaguar Well-Known Member

    The Grubee engines carburetors are 14mm inner throat diameter which is fine for the stock 48cc (although they work like crap) but undersized for the 69cc (80cc) whih needs 18mm. If the engine has the exhaust port raised and the intake port lowered for higher rpm then the 48cc needs 16.5mmm and the 69cc needs 20mm. So if you want to upgrade to a better functioning carb that is correctly sized then you can use a Mikuni VM carb or a Dellorto PHBG carb and special adaptors. For diagrams you can print out and take to your local machine shop, and where to buy the carbs, go to