I love the no BS approach. I called for a motor build and derek flat out told me what is a waste of money. He couldve charged and made money on these things but he told me they make no more power. Hes been a gentleman to work with

DUDE.... LOVE YOUR VIDEOS. I found you because of Deegans Bike Claim. And I am so into building and wanting to make my own custom parts. Love you stuff and I thank you for sharing some of your knowledge. I just do it for myself but sharing knowledge is the most selfless thing one can do. Thanks a ton and I am hooked and watching every video. You rock bud.

Absolutely love the in depth tech talk and explanation of engine theory and application, I can geek out on this stuff all day long and I learn so much from your videos.

Killer video keep them coming!

Great stuff.

Crazy stuff. Remember my 1981 yz putting out 13.5 Hp. I could still keep up with 125 experts. Good little bike. This creation is crazy, fun. 😊

I love the technical aspect

The dry erase board is my favorite part.

You're a handful of information man. I'm still a high school student that loves to work and tinker on my bikes just as much as I love to race them. I would love to learn how to port a cylinder, I only go as far to clean up the ports and polish them so there smooth after my rebuilds in fear if I try to port the cylinder I will end up with a ticking time bomb. Any way enough of my rant, you make great work and I enjoy the content.

Nice to know, im running 31 horsepower straight on mine 112 supermini in Denmark, ported, fmf big bore, vhm head and 28 mm smartcarb. It is running slightly rich, i was running 25 horsepower on the same dyno as maxed 85cc with stock 28 mm carb 😎👍

Amazing vid. Hope to get one from 125cc. How much peak hp do you think guys are getting out of emx125 top engines?

That is great to know, well done & for a young man considering a 125 instead of going into supermini, These 85 to 112 are the stepping stone for youngsters to begin the enjoyment of bikes.

Performance on par with the manufacturers! What’s more important for the holeshot? Horsepower or Torque

Here is a question for you since you were talking about carb sizing. I always hear people making the claim that airboxes are restrictive and if you open them up, ie put more holes in them/ whatever you will make more power. This always has seemed like a false claim to me as I assume that it doesn't matter because of the relatively small cross sectional area of the carb itself. And that allowing more open air before the filter wouldn't matter as long as the cross section area of all the openings before the filter matches that of the carb's cross sectional area. I'd be curious to know what conclusion you have come to?

It would be sweet to see Yamaha YZ85/Suzuki RM85 with similar work and porting etc and see what power it makes on the dyno to the KTM!!! Take an older one and make it max power hahaha

What do you do when you ported the cylinder your got any pictures or videos explaining what to do I got a 105 kit coming what are the exact gains of the porting you did thanks.

GG Boys 💯🤣👌👍

I heard the 105 kit makes more power?

😎🤙🔥

do you have to do anything with the computer? because ktm sell one with the 105 kit