Originally Posted by
Losi-Runner
Hey Tony I just placed an order on your site for the JX21 head button. The dyno graph was impressive just from a modded head button. Just 1 question Tony; is it ok to still run 30% with the 1 head shim from the kit?
Absolutely! The EB Mod JX-21 head button with one .004" (0.1mm) shim is set for 30% nitro fuel.
Best regards,