Also at a basic level you want to never touching the base of the exhaust port you gonna want to raise it to increase peak rpm power. Raising transfers helps bring the peak rpm up higher but without a good pipe it’s not going to take advantage of it. Finally the intake you want to lower the floor so the fuel and air mix gets in quicker than stock. Hope this gives a bit of insight

Thank you so much Tony for these portwork series, would love to see more

Good stuff Tony! (It’s me, David) Looking forward to the next segment, this is a great topic to explore

Dust mask is nice to use while grinding as well I also tape my shop vac hose in there to suck out the pieces as I grind 😂

I use a round file, that's it. It is a little slower but really forgiving. I don't mess with the intake/exhaust timing but I like to make the interior of the port funnel out much wider, add a 21mm intake and run a higher set of jets. Makes for good response and more power. There is limits though, you don't really want the ports too big.

Great video

I'm just getting back into motored bikes after 10 years of not having one. Your channel has been great for new knowledge. I wonder if you have seen 'kreosan english' channel? You wont be dissapointed, 3 russians on mopeds hundreds of miles from anywhere. You should maybe do a video on what they did right and what they did wrong. Ride on!

Since you probably have access to endless cylinders it might be beneficial to actually show some mistakes for people maybe what happens if you grind away to much or something like that

I'm brand new to the motorized bike scene, so this might sound like a stupid question? If it does I apologize... But what kind of performance does this give? Also does it give the bike more speed? Sorry for the dumb question fellas but I'm loving the hobby and most of you guys are pretty awesome with helping me

Tony, I love this series of videos! Answers so many questions that I didn't know I had. However if I may ask you one question: someone I know, who looks a lot like me with a similar name, may have " over did" the porting/ polishing on his intake, inadvertently raising the top of his intake. Not by much mind you but there is a bit of a rounded peak now. What can I expect ,performance wise from this motor and is there any way to nullify my...I mean his mistake? Will a windowed piston/ reed valve make a difference? I appreciate your time and consideration, thank you.

I have the new v2. When I port/polish the intake, I should also do the same to the reef to match correct? And when will upgrades be available for the v2?

It's best if you trace the inside of the intake and exhaust gasket with permanent mark on the ports so you don't over grind those areas.

What are the aftermarket exhaust options that actually utilize the larger port instead of just blocking what you’ve already done to open it up

Sir, I need such a help. I want to ask about the port of such a cylinder, how can we increase the speed and hourse power from its port. Please help me. Please tell me.

And on the v2 you don’t need the boost bottle right ? Because of the reef valve…

Why didn't you port match the gaskets, and polishing does very little

everything about the video is good, except the leaving the intake rough, Velocity and volume overcomes any tiny residual chance that a rough intake "atomizes" fuel and a mirror finish on both the intake and exhaust is the way to go to maximize volume and velocity..... what a rough intake really does is it causes points where the tiny droplets of mixture can accumulate and increase in size.... If rough was a real thing then all the pro builders would be doing it to their race engines in motor sports...... NOT knocking the video at all , was an awesome vid but the "leave the intake rough" is just bro science bs