• If your have CLUB EVENTS/RIDE & would like to announce it here,
    Message traxxas-modifier about it :-)

Bore 62mm And 65mm Upgrades


New Member
:help:Newbie questions here::help:
What are the mandatory upgrades when upgrading to an aftermarket bore?
-62mm Uma/ other brands?
-65mm Uma?
-Does it require any type of superhead from Uma Racing to go with their bores?
Thanks for the expert recommendations and answers!


New Member
Can i still use my stock head for 62mm bore? I'm having a dilemma if it will be compatible or not. Thank you :thumbsup:


New Member
Engine spec:
Bore: ceramic 65mm
Stroke: stock
Valve: 25x22
Camshaft: 5.8mm hi-duration cam
Carburetor: Keihin PWK33
Exhaust: leovince
Not recommended for daily use cause carburetor spec