Losi xxxnt engine replacement.
Been out of the Rc world for quite some time. Pulled out my old Losi xxxnt that has been sitting forever because a friend is looking to build a track. The the old Mach seems to be non tuneable so I'm calling it junk. Looking for a direct fit replacement engine. Doesn't has to have tons of power just something reliable and decent priced. I've look but not to sure what to look for totally. I know it's rotary carb, rear exhaust and pull start. Any suggestions?