To time a GY6 engine, first, ensure the engine is at the top dead center (TDC) by aligning the TDC mark on the flywheel with the mark on the engine casing. Next, remove the timing cover and inspect the timing marks on the camshaft and the engine case. The camshaft mark should align with the mark on the case when the engine is at TDC. If the marks do not align, adjust the timing by repositioning the camshaft sprocket as necessary and recheck the alignment before reassembling.
how do you rebuild a Roketta 150cc GY6 engine?
Replace your CDI
to the air box
check partsforscooters.com
.03 intake .04 exhaust
valve adjustment. .03 intake .04 exhaust.
If you are asking about compression numbers, they should be around 150psi.
I got a DF50sst and it’s a 20mm
how much is the price of koso racing pulley for yamaha mio?
go to scootdawg.com they have a free 200 page download for gy6 scooters. most 50cc are gyd or 139qmb.
on 5occ - 150cc gy6 qmb or qmj engines the rev limiter is part of the cdi programming.
Isolate the wire going into kill switch [wrap some tape round it] so it cannot be earthed.