It's been discussed many times here that the rev limiter on a saw can be mistaken as 4-stroking. One solution is to tune with a tachometer. I put a tach on a ported 5105 this evening and found that it does not bounce and go crazy when you hit the limiter, like limited saws traditionally do. It would be entirely possible to go way too lean and still be getting what appears to be a valid tach reading. The solution for a stock saw is to go fat and come up to the RPM you're shooting for. As always, the only way to tune a ported saw with a limited coil, is in the wood. Don't burn your 5105 up guys!
BTW. the coil maxed out at 14,200, still 4-stroking hard since it's ported.
BTW. the coil maxed out at 14,200, still 4-stroking hard since it's ported.