YX 140cc complete Cylinder head kits Equipped with Z40 Decompress Camshaft For 4 stroke 140cc Chinese pitbike ATV Scooter Dirt Bike Go Kart monkey bike dax bike, CT70

I installed this head, and new piston as my pit bike (2018 Thumpstar 140cc) was smokinglike a fiend, horribly, and running terribly. The actual problem I determine to be thepiston rings. I may not have actually needed a new head, but this head works fantastic,and it is possible that it's better than what I had, could also be identical, sure looksthe same.I have the valves set at .003 intake and .005 exhaust. I tried different clearances butthis is oem spec for the bike and seems to work well.I'll for sure be buying again from this seller next time I need a new head and valve set.

So I ordered for my pit bike. Husband put in.issing the oil passage tube thing but put old head cover on. Has horrible ticking noise and blow bye. Come to find out, no valve seats were installed either. Very unsatisfied. Now it all needs to be redone and I can't ride it.

Definitely gave a noticeable increase in power over the stock 125cc head for my 141bbk on my grom clone.

As advertised except there are no steel valve spring seats installed. Watch out. Valve spring will eat right thru the aluminum head.

Everything came in package as shown... However, the cam shaft wasn't in place, probably due to shipping. For the beginner who doesn't know much of anything I'd suggest informing buyers to make sure all moving parts are correctly in place before assembly. I inspected all moving parts and noticed cam shaft was out of place. Having said that, it does work fine, and it gives my daughter's bike a little more power.

Works well with 141BBK kit. No issues so far

❤️🤘🏽💯💥

it came with missing bolts like the bolts for the oil cooler and no bolts for the timing rods cover. but over all decent product. also fits great on kymco k-pipe 125