I have a 1991 ski doo formula mx with a mach 1 motor in it. The throttle cable broke and i bought one for the mach 1 but now the second you start it it takes off at top speed and races. so we put it on the stand and started it and tried to press the throttle in and it bogged down. is my cable short. or a mixture between the cable being short and carb settings being wrong. I have paid for part of 3 sleds and none of them work, so Im really hoping to get this one going. The motor sounded strong, not a miss in it.