C Compu-kart Member May 16, 2021 #2 I understand the gx390's are competitive on small tracks. The 450cc motorcycle engines, i.e. Honda crf450r, are favored for their reliability and horsepower.
I understand the gx390's are competitive on small tracks. The 450cc motorcycle engines, i.e. Honda crf450r, are favored for their reliability and horsepower.
