part 1 of 139qmb build, 52mm bbk with big valve head. Part 2 will show torque specs and complete build. Remember to like and subscribe and then head over to @scooterrehab6295 to see what hes got cooking.
Пікірлер: 18
@cliffsbackyardgarage834 Жыл бұрын
That's a great kit I have 2 qmb's with that kit.
@KevinHernandez-hz6kj4 ай бұрын
Hello sir 139 qmb,,but sir in Philippines we call it RUSI GY6
@user-vl6kl1dh1t8 ай бұрын
Very informative thanks for sharing 👍
@Bluenosedogman9 ай бұрын
Dope bro i never heard someone say “pause and go support someone else” props. Im doing it now. Im here tho cause i read 52mm….i thought 50mm was the limit
@scooterarmy9 ай бұрын
I like to support the community.. can't even remember who the shout out was to, but check em out for sure.
@KevinHernandez-hz6kj4 ай бұрын
I think up to 63mm to 66mm bore up I'm right?
@KevinHernandez-hz6kj4 ай бұрын
And I think you can change the head into 4 valve GY6
@thundercatt52657 ай бұрын
23 mm /intake and 20 mm exhaust valves with bigger intake and exhaust ports ,i just put one on a 50 mm cylinder ... i had to change out the rocker arms, because the former was a 69 mm valve type ,but this one has a 64 mm valve length , it made a difference but drinks way to much gas right now I'm riding 3.5 's, stock clutch , with a vented and drilled clutch bell with a racing varator ,i have the racing clutch but I don't like the higher RPM engagement spring
@scooterarmy7 ай бұрын
3.5s? What kinda rpms are you pushing
@scooterarmy7 ай бұрын
Wait.. you talking tires or weights
@angelluna15827 ай бұрын
Did you use another cylinder head?
@scooterarmy7 ай бұрын
Not sure I understand the question? This video including part 2 is replacement of stock Cylinder and head with a larger Cylinder and big valve head. If I recall correctly an a9 cam also.
@scooterrehab6295 Жыл бұрын
So weird hearing my voice in the background 😂
@scooterarmy Жыл бұрын
It was semi unplanned.. but I ran with it.
@scooterarmy Жыл бұрын
Nothing better than building engines on the couch lol
@scooterrehab6295 Жыл бұрын
@scooterarmy thanks for the shout out ‼️
@rallyscoot7 ай бұрын
A9 cam only for 90cc? Is it recommended for 44MM bore 63cc kit? What the difference between stock cam, A9 cam, A8 cam , sport and racing? A9 cam is sport or racing curve?