Hi Jeff,
I am completely stumped with these, can't remember how many I have worked on and everyone of them has caused major issues. Belt tension is not the problem and on it at the moment it only has the spring tension that sits in front of the motor on it. This one here at the moment is the one that was kicking back savagely and I eventually fitted the decomp with the restrictor and that solved the problem. On the 2 motors I fitted today I used that same decomp valve, might try a different valve in the morning and see if that gives me kickback. That is about the last thing I will try on it, I have already told him I can't fix it and to come and pick it up. It is in good condition bodywise, but just fitted with a motor that is not suited to the design
