more 4910 porting tips an Me rambling 

And this recipe makes for one of the baddest 50cc saws built Take note of what this guy does

The jug on my 4910 from factory had 62 thousandths squish. Which I thought was terrible. I did not know that some of them are as large as 85 thousandths. That is terrible. On another note this video is absolute gold! Thank you very much for sharing your knowledge and experience!

Thanks for sharing all that info 😎👍. Have a great weekend

Excellent description of how you modify your echo 50cc saws. And it all sounds logical.

I appreciate you taking the time to explain what and why! 👍👍👍👍🇺🇸🇺🇸🇺🇸🇺🇸🙏🙏🙏🙏

Thanks Mr Brisco. Very helpful. 👍

Thanks Charles. I have a 501 and plan on doing my first ever porting on it. Just getting set up with a timing wheel etc. Thanks again.

Great work love it!!!!

well its nice to share info. this stuff is gonna die and will be lost...there is quite a few on youtube that don't want disclose their tricks like they are worried people will be stealing it and making money, i could name a few. which you might find the odd people will have a go, but in the grand scheme will you lose anything i really doubt it? if you do quality work people will always come back. nice work though👍

This helped me a great deal! I am an amateur at working on chainsaws. So I see things and have an idea that I believe will be better but I dont know. This video backed up some of my own thoughts about my 4910. Thank you!

Thanks for sharing! Appreciate it a lot!

Very nice! Should make another great runner.

Exhaust gasses also shrink as they cool. You see guys with a 4 inch final section on their car exhaust and the have stopped the cooling gasses so the shrinking gas behind it runs in to it. I get the fact that you want to get the heat out of a 2 stroke thats worked but you are right about potential flow versus velocity.

Great job Charles! Merry Christmas!,🎄🇺🇸🎄🇺🇸

This helps a ton thanks

Charlie I ported my 357 xp lower transfers only and they were huge and that saw ran like a race horse .

Dang good looking work !

Thanks Charlie Great work!! Years ago I read an article where a guy polished the intakes just as the exhaust and when he had the shape he want and polished smooth a took 220 grit and roughed it back up. I was wondering if the intake could be sand blasted or bead blasted to get a consistent texture after polishing them?? My mind is alway pondering such things!

Charles up here in interior Alaska, we dont have the option of running high octane fuel, pretty much 87, that sits all winter long that comes from a barge, does your porting require higher octane gas, if so I can always get octane booster, really good video on explaining your logic as well as things you ran into.

Thank you.

This is very helpful. I would like to see the muffler mod

Makes me want to pick one up and send it to you for a mod

How much do you typically charge for a 4910?

Nice work Charles and your explanations of what you are doing and why are very helpful. Do you run the stock coil and are you changing/plugging the decomp? Looking forward to seeing the muffler mod. Really appreciate your videos!

I keep walking by the 4910 at my local feed store eye balling it. Think I’m gona pick it up next pay!

Very cool man. Are you leaving the transfer roofs as is from factory? Or raising them to match what you take off the base? Kinda sounds like you mostly just leave the transfer roofs alone.

That’s exactly right, very uncommon for 2 saws to have the same squish from the factory. No two builds are ever the same. I’m into the 51 Husky’s now.

Second!

What do you use to port the transfers? I saw the video of the different tools you use and I did not see a 90° so I was wondering how you do it

First

What kind of transfer duration do you end up with

My #s were stock numbers I did t touch anything other than the wrist pin out of a ms362

Where can i buy a completed 4910

How do I get in touch charley

Contact information please?

Do you tinker on CBS's to mr brisco