Dolmar 6100 and 7910 muffler mod questions

[Backtroller]

It's an illness I tell you. I had the 421 ported, then 5100s and finally 7910 just finished by Mike. There is definitely a difference on the 421 and 5100s. I have some good run time on those two. Sadly, besides starting the 7910 and reving it up a little, I have not had the opportunity to run it in wood yet. I have Too many other things going on at the moment and nothing worth cutting.

My 7910 has the 13,500 coil. It was a 6421 at one point.

 

[Backtroller]

Porting it is well worth it. I can tell you that from just starting it up and reving it up a few times (well a bunch of times), I can tell that it revs much quicker and has a completely different sound. The trigger is much more responsive and it just sounds pissed off. From the videos Mike shared with me and corresponding with him I know that it's a runner.

I really need to find something to cut.