It runs so much better with the different carb. Will be great to see it with a nice ground chain. One of the peppiest Mac’s I have seen.

Bless you Smitty for sharing your life and wisdom with us:) God Bless and Protect you and your family:)

Brand new saw. Nice build my friend. ❤️🪓🙏🏻🌲👊🏻

l have a 610 myself with an under and up Iron Horse type of pipe that exits thru the bottom window in the side cover . Off hand i would estimate that I have like 16hrs in the making of it. What a difference it makes in power ...well worth the effort.

Interesting to see how the adjustments and changes to the saw have made it a real performer. It looks like the spark arrestor screen was still on it. They are OK for a stock saw, but a bit restrictive on a hot rod. I always run my 610's with the screen off in the wet weather, and clean them and put them back on in the dry weather. The saws run a bit better without them. Looking forward to the next mods your are going to do, and see the results. For those commenters that say the 610's are heavy, remember my moto (If you have to complain about the weight, that means you are a WEENIE, and need to toughen up !)

I keep checking back waiting for this video and it did not disappoint!!! This is a cool build. I ported a smaller 38cc version of this saw and surprised how much I like it but I think it needs a custom muffler like what you’re saying with that 610. I seem to hit a wall at 12,000 rpms. Fun to play with these.

Great job buddy! 👍👍👍👍🇺🇸🇺🇸🇺🇸🇺🇸🙏🙏🙏🙏

Great job buddy. She a dang ripper for a 610 huge improvement!!

I’ve got a non ported 610 with a stock carb that runs HOT and will happily eat through anything faster than any other saw I own! It runs way better in the sub freezing temps

Nice work smitty she’s a runner for sure 👍

Your getting real professional with these intros smitty mate 👌

Those 610 were really heavy for the power they produced stock, good job waking it up.

I picked up 2 610’s from Eric Salyer at SawFest. 1 is roasted and I used parts from it to get the TimberBear running. It’s a good and my my it’s so dang loud. 😂

Ya I could tell when it bogged down but after a adjustment went to town

I have three of those 610 Max

I think the mcbrick is my new favorite. I have three. They are ugly, but they got personality.

Where did you find that air filter setup?

did you hone the cyl, an if so what size hone did you use on the 610

a waist of time a standard 650 which is the factory hot rod will blow that thing in to the weeds