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A saw supposed to run at it max with long lasting durability. Modification will make the engine run above it durable max and will def shorten it's lifetime.
Climb safe
wouter
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Not true, wouter. I have many fully woods ported saws, and they are holding up just fine.
Stock saws produce far far less than their potential power.
Muffler modding alone will lengthen engine life as it allows a saw to run cooler. The rest of work saw mods won't affect engine life much, good or bad. But for a given number of hours in a saw's life, a modded work saw will have done 30-60% more work.
Timing changes and port enhancements are not huge changes in a work saw, unlike mods to make a saw race ready.
Also, Brad did no jug/piston work on the 201. He only adjusted the timing to bring out the potential power that mod was capable of.