I have a Massimo T-Boss 750 with this exact same problem. They replaced my ECM...no change. I basically burnt up my starter and positive wire to the starter. These were replaced once they found the root cause. The problem is the cam assembly. It has a compression release at low (starting) RPMs. Centrifugal forces closes the valve at higher RPMs. Massimo was of little help to my dealer... three cams were tried. Finally one worked. It's like a new machine...this took nine months. It's starts first time every time. How wonderful. But it was a nightmare and more time in It's first nine
months in the shop than on the trail to get it fixed. Great side by side when you can start it. Massimo needs to fix this cam issue, quit shipping machines to dealers that will not start and support the T-Boss 750.
Jim do you happen to know the part number for the cam that worked?
Massimo T-Boss 750 hard starting
in Massimo UTV SxS Forum
Posted
Jim do you happen to know the part number for the cam that worked?