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Thank you. I appreciate the effort.

What is wrong with improving performance, for somebody that wants better than stock power without having to buy a larger saw?

They do tend to gain well.

Yes

881 261 stock and ported.

All 3 options 490,4910,501

Once ported they end up very close in power, but the 490 is rpm limited too

I like removing the small lower deflector and adding a couple of small 1/4-3/8" holes in the flat part under the stock deflector.

Little gain in power. I'll have to try a dirty test sometime.

Was in my homelite c7 video. Don't sell them yet.

Mine is a housing with a 1 way bearing with a 3/8 drive for a socket. Same could apply to a starter hub, drill spins and as the engine fires it will over run the bearing.

1128 boot, but they are a bit short. If you are heavy handed you may have issues with it peeling off the cylinder. Might want to look into a longer option if you have others sitting around to check.

Fast chain will win every time. But more power is always more power. I'd say it is probably 50/50 A good sharp chain will extend saw life as much as anything.

I have had 15k+ out of the 620 coil bit no real power is made up that high.

Not many unless you are building the saws at the same time. Shipping 35-70$ each way plus a 40-60$ dyno charge adds up in a hurry. If you have any dyno questions let me know. I will try and help you learn from my mistakes.

I found one. Here is a bump for maulhead

As a stock saw. Once ported they have a hard time leaning out enough. That is the reason for the nozzle swap.

That was the old data system all done by hand. New system reads about 7% lower. I'll be getting some more dolmars on the dyno soon. The 13k "drop" isn't really a drop, it is the climb. Pulls are made from high rpm to low. Just like cutting. 13k ish is where the saw tune was and I started...

Yep, that is me. Hope you enjoy the content.

How many boxes would you like? I'll send a pm