GX270 RHG4 and RHQ5

[roadrunner777]

Hey guys new here, first post, I`m running the above engines on sodi track karts but recently I`m being plagued with back fire, any tips, thanks in advance.

 

[cloneguy]

Could be lean, could be a partialy fouled plug/failed resistor cap or a few other things.
Give me (greg) a call at Engine solutions Inc. 815-979-2312 and we can work thru this
and get rid of the backfiring.