Pitbike head and piston change (YX 160)

We had some valve issues and we decided to update head to HC.
New engine snapped the valve and that lead to smashed piston and head so we decided to order new piston and cylinder with head (high compression).
Parts were ordered for YX 160 engine.
Part list:
Head - www.sport-toys....
Piston - www.sport-toys....
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[@emeraldmx5659]

Great video I didn’t think you could rebuild the pit bikes and sold mine when the compression went low now I see i made a mistake selling it saving for a mx bike tho

[@handsomefingers7759]

yeah and it is much cheaper choice than mx bike.

[@Rectro-V2]

Done this but when spinning the flywheel enough it comes to a complete stop won’t budge but turn it the other way goes for abit then won’t budge again?

[@kursutin2446]

That bike is not running correctly, the rpms are floating. And are you sure there isnt any metal parts that flew to to the cases when the bike blew up? Might cause some damage in the future.

[@handsomefingers7759]

there was air leak in rubber intake manifold and it made rpms float. and yes i am sure that there isnt any metal parts ir crankcase.

[@kursutin2446]

@@handsomefingers7759 Ok nice :)

[@watai]

do you remember the 2 bolts inside the head you forgot to put it back on ? I lost them, do you know how long they are? Thanks !

[@yorkshireriding3260]

How did u do the timing chain and know when it’s perfect just ordered new head for my yx160 and have no clue about the timing

[@handsomefingers7759]

turn magneto that T mark is aligned with notch in case, cam sprocket turn that lines align with notch in head.

[@handsomefingers7759]

and then put on chain

[@yorkshireriding3260]

@@handsomefingers7759 oh thankyou I’ll take a screenshot off that and let you know on day when it’s done aha

[@somtingwongwai7194]

@@yorkshireriding3260 This guy explains step by step how to do that in the video link below. should be Same principal as mention above kzbin.info/www/bejne/mnXLeKGOr5qsgas&lc=UgxYdWmnW-mJ1a9xrhx4AaABAg.9OXC1LK6nbH9O_HH8qb3sI

[@brotherkhan2885]

Hello, i have a 160 but the carb hits the tensioner, were do you get that intake rubber boot from and how do you fit?

[@handsomefingers7759]

hi, you can get it from ebay or aliexpress. Rubber boot mounts on intake with screws, but depending on intake you can use silicon hose in necessary diameter.

[@brotherkhan2885]

@@handsomefingers7759 do u have facebook

[@raymondharlen2753]

Can I have the old head?

[@dylanbelley1761]

Did you hone the cylinder or anything?

[@handsomefingers7759]

nop, cylinder didnt haave any damage

[@gala83filmstaylorg7]

Not one bolt tighten to spec lol

[@handsomefingers7759]

And engine still runs.

[@gala83filmstaylorg7]

@@handsomefingers7759 surprising

[@eleazarmejia]

mofleta para súper cub kzbin.info/www/bejne/eWfFoJqBgauAd6M