Need upgrade parts for Manco Carbide..where?

[bnt5]

I have a manco carbide 7010 with subaru robin ex27 does any of the contributors on here able to get upgrade parts for this go kart? I need more torque/power. Not sure what to get and I need some advice as well as a place to spend some money...!

thanks

[bnt5]

nobody? I have been through 3 different companies with no luck...