Alexander Jäderblom Thanks! I'm not sure if I'm trying to be a teacher or not, that sounds like a lot of responsibility so I'm going to call it "show and tell" for now ;) I just want to make the kind of videos that I enjoy watching myself, and make do with the tools I have without necessarily doing everything by the book. A lot of this stuff is pretty new to me too so I hope people that have better ideas will point out my mistakes so I can learn from them. But if you learned something from watching my stuff that's good! Just remember that I'm just an amateur messing around :) I'm glad the dinosaur got someone to crack up ;) Every pass took around 20 minutes so 5 of them felt pretty much like 65 million years 😂

I learn better from show and tell, so in that way you are a teacher ;) And you can learn stuff from entertainment as well. As I said, the problem sulution is the new thing i learned, would like to have a lathe some day. :) 20 minutes per pass? shit.. well then it is at least if not more than 65 million years, the dinosaurs will have taken over, then been run down by kelp that by then have evolved into a kind of animal and will dominate the universe, but the cylinder will be done. ;)

2STROKE STUFFING I was just glad it didn't hit me in the face this time! 😂 I don't use the 3 arm for honing to size, just for finishing. I'm sure someone will have something to say about it but I don't care, it works for me :)

nice job, eller på danske godt arbejde :P

TEAMVISKAT81 Tack! Not sure if that's correct Danish ;)

close enough :)

Rat Sleds That's a good name! May use that in a future video ;)

Jacob Felts Exactly! Smooth as a baby's bottom :)

Tack! Tandläkarverktyget är en gammal Tysk en, gissar på 80 tal, den kommer från tandläkaren här i byn :) jag minns inte märket just nu men ska försöka komma ihåg att kolla nästa gång jag är i garaget.

Russ White I guess I'm at least a couple of weeks ahead of you then in the learning process ;) I had never stroked a crank or bored a cylinder when I started on this project. But eager to learn the hard way :)

Hollaendaren oh yeah its a school the school of hard knocks sometimes but never boring thats for sure.

Thanks! I bought it second hand, I am pretty sure it is commercial. But it looks to be pretty old.

Adam Brown I think the main difference is that you need to warm the engine up for a longer time for a winter engine. And I'd imagine manufacturers take into account that a lot of people don't do that so probably increase the piston to wall clearance a bit compared to a summer engine. Other than that I can't think of anything. There's no gearbox or clutch oil or other oils in the engine, just 2stroke mix. Bearings are C3 bearings.

Correct! There's a small decompression channel between the sleeve and the exhaust channel, opened and closed by that valve. I think it's mainly intended for young riders who might have problems pulling the recoil starter quick enough and might encounter a backfire every now and then, causing the starter handle to try and rip the fingers off their hands! Think of a CR500 kickback but on your fingers, it's not a nice experience ;) I have tons of this type engine and 90% of the time the decompressor is stuck so I think most people never use them. My 277 also had one (some 277 cylinder do, some don't) but into one of the transfers instead of the exhaust. I eliminated it by plugging hole into the transfer and simply not putting a hole in the sleeve.

OK thanks, watched the rest of the video and couldn't see the passage going to it. Not a bad idea in bigger bore two strokes.

That cylinder I'm holding at 1:44 has nothing to do with the rest of the project, it's off a completely different engine. Probably should've made that clearer in the video.. I only used it to get an idea of how long a sleeve a cylinder with 70 mm stroke really needs. At 1:10 you can see where the decompression valve used to be on the project cylinder, on the left top of the cylinder.

nullerdk1 Thanks! Sorry, not taking jobs, I have my hands full with my own projects :)

gislemark79 Jag vet... Men jag hinner ju aldrig städa klart innan man ramlar över nåt som måste fixas lite snabbt 😂

Undanflykter...

Jepp... Men det mesta är roligare än att städa så det är lätt att bli distraherad :)

Men det är mycket roligare att jobba när det är ordning och reda, samt att man blir mycket effektivare.

Jo jag vet, det är helt sant! Jag började städa i höstas och sen dagen därpå så köpte jag en halv verkstad som jag behövde klämma in tillsammans med allt som redan fanns där inne. Det gjorde inte saken bättre om vi säger så. Men just nu känner jag mig lite för stressad för att börja städa ordentligt, första tävlingen är om 2 veckor och du ser ju hur långt jag har kommit ;) känns inte som att det var perfekt läge för att börja städa garaget i en vecka nu.