Mega;
Thanks for the advice. I have been contemplating sending my P/S t Ray for a re-size. I've never done the re-size before; I usually just chuck motors after they wear out. But I will say that I really like the Toro Nero. It has awesome power and since running the 2084 pipe, I have been getting really good mileage out of it (10min on a tank easily). It maybe worth it to perform minor surgery on it to bring it back to life.
. I appreciate the input.
Originally Posted by
megasaxon
did the flameouts start right after you changed the head shimming? I'd just try going back to the stock shimming and see how it runs.
However at the 5 gallon mark, getting the sleeve reconditioned by RayARacing is a good think to do, also a front bearing replacement might be in order. If you do those 2 things, you will be back in business, should run like new. $15 for a TKO ceramic front bearing, $20 for sleeve reconditioning. thats a pretty cheap freshening of your motor.
Also check the rod slop. you can measure the inside of the rod and the outside of the crank pin with a set of calipers, rod should be no more that .198" and the crank pin should be no smaller than .192" to be within spec, so no more that .003" wear on either part or .006" total. so if your crank pin is within that .003" range and so is your rod, you can replace the the rod and be within spec as far as tolerance goes.
new R7 rods are about $55, so even if you need a rod, the whole motor can be rebuilt for around $100 and be just as good as new