how do you rebuild a Roketta 150cc GY6 engine?
.03 intake .04 exhaust
go to scootdawg.com they have a free 200 page download for gy6 scooters. most 50cc are gyd or 139qmb.
Not all engines with the same displacement have the same power. This being said, a 200 cc engine usually has around 30 horsepower.
My Baccio VX150 has a Chinese GY6 Engine in it as do a lot of 150 scooters do that are Chinese or Japanese Made. They have all stock parts for the baccio vx150 scooter.
On a GY6 engine, the timing marks for the camshaft are typically found on the cam gear itself. You should see a mark or a notch that aligns with a corresponding mark on the engine case or the cylinder head when the engine is at top dead center (TDC) on the compression stroke. It's essential to ensure that the timing marks are aligned correctly during installation to maintain proper engine timing and performance. Always refer to the specific service manual for your model for exact locations and guidelines.
Replace your CDI
to the air box
check partsforscooters.com
valve adjustment. .03 intake .04 exhaust.
Take off the fy and u have ur answer its the same engine as the gy6 139qma used on alot of chinese scooters and quads hope this helps anyone who needs the info.
If you are asking about compression numbers, they should be around 150psi.