After searching for a service manual for a 150 cc (Blackjack), I can only find Service manuals for 125cc
-Not looking for a Backjack specific service manual.
Just wondering if the Valve adjustment gap on a 150cc is the same as the 125 cc?
YouTube is showing completely different specs for a GY6 150
... example- intake-0.19, exhaust-0.23...
Buddy 125 service manual shows 0.08 for both
Any help from a Buddy guru would be greatly appreciated.
... I know how to do the valve adjustment, I'm always adjusting the lash on my KTM supermoto.
Valve Adjustment specs
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hairball
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Valve Adjustment specs
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PeteH
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I haven't heard anything about the PGO 150 engine vs. their 125, but I think I recall that the top end is the same, just the bore is bigger. That online copy of the service manual is based on the 125.
That said, yeah, the appropriate tappet gap is .08 mm / .003 in, depending on your set of gauges. Same for both intake and exhaust, but doublecheck me on that. My old Honda 4 used one of those paper-thin gauge values, too, and it was like working with tinfoil
That said, yeah, the appropriate tappet gap is .08 mm / .003 in, depending on your set of gauges. Same for both intake and exhaust, but doublecheck me on that. My old Honda 4 used one of those paper-thin gauge values, too, and it was like working with tinfoil
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ericalm
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Valve specs will be the same. Only differences in the 150 are the bigger bore and the oil cooler. (Same head.)
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7ate9
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valve gap 150cc black jack
IS the 150cc a Honda knock off?? any luck on the valve specs Please let me know.. thanks!!
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ericalm
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Honda? No… well, not really, kind of, maybe.
It is a GY6-based engine, which are all descendants of a Honda engine. Almost all modern Asian 4T scooters under 200cc use GY6 variants. There are "generic" GY6s which are often used in Chinese-built scooters. The Buddy has a proprietary PGO engine but it has some things in common with other GY6s. Parts aren't interchangeable for the most part, though.
It is a GY6-based engine, which are all descendants of a Honda engine. Almost all modern Asian 4T scooters under 200cc use GY6 variants. There are "generic" GY6s which are often used in Chinese-built scooters. The Buddy has a proprietary PGO engine but it has some things in common with other GY6s. Parts aren't interchangeable for the most part, though.
Eric // LA Scooter Meetup Group // Stella 4T // Vespa LX // Vespa LXS // Honda Helix // some, uh, projects…
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hairball
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Well I checked the valve clearance on the BlackJack and both were 006... Tighter than the 008 gap for the 125, Which seems to make sense... Allowing the valves to open more to offset the displacement - Yes, I checked the clearance on a cold engine 
... I don't really think the valves will get tighter over time and the scoot is running great, So I believe the gaps are correct.
... I don't really think the valves will get tighter over time and the scoot is running great, So I believe the gaps are correct.
If trees screamed when they were cut, We would stop cutting them down...
If they screamed all the time... We would cut them all down!
If they screamed all the time... We would cut them all down!