Im running 28 outlaws, and in some sticky mud this weekend I had problems spinning the tires a few times I had to back up and get a run to make it threw. I have the black spring that EPI offers on the secondary but I think if I had a higher engaging primary spring such as the red spring hopefuly it will solve my problem. Any ideas would be helpful, coolinthewoods.

 

Nobody has the answer? Maybe you should ask EPI themselves.

A guy named Northarkie650muddr has these and wrote:

"I can turn the 28's in deep mud with my gf on just fine now, and no belt slippage what-so-ever."

and

"my 650 will do wheelies nearly as good with 28's now as it did with stockers before. top end i dont know about yet."