We ran into the same type issues last year with one of our CRF450's. Changed everything out wire harness, ecu, coil, all the normal stuff.....got advice from another racer to replace the flywheel. We were hard headed...stock flywheel...what could go bad on it? Well, we finally changed the flywheel with another stock Honda wheel.....Problem solved. Have no idea on what can go wrong with them, but a new wheel fixed it....
Another thing we learned through this process is that you do not need more than a small black "clone" fuel pump even when on alky. Even with serious built motors.
Another thing we learned through this process is that you do not need more than a small black "clone" fuel pump even when on alky. Even with serious built motors.