That sucks about the springs.
I had the hi performance (10,000 RPM rated Blah, blah, blah) NCY springs when I had my catastrophic engine failure.
One valve was impacted into the piston side-ways, and the other was sitting on top of the piston when I removed the head.
In my opinion, waste of $$$. No better than stock
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My Yerban assault vehicle: 2.2mm stroker crank, 62mm Nikasil cyl, Taida large vavle head, American made valve springs, ported intake manifold, TM 28mm carb, stock CDI, Bando coil, TK exhaust, stock CVT except for the 14g sliders, 13/40 internal gears, 16T drive, 31T axle sprocket, 22" rear tires, and ONE BIG POTATO CANNON mounted on top..........
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