How To Set Cam Timing

This is how to set the cam timing for Honda's 50/70cc OHC horizontal engines.

Category:

Howto & Style

Tags:

• honda
• z50r
• ct70
• crf50
• crf70
• xr50
• xr70
• atc70
• xl70
• sl70
• z50
• monkeybike
• minibike
• pitbike
• monkey
• mini
• pit
• how
• to
• set
• adjust
• cam
• timing

[cobrachoppergirl]

How do you do this with a 4 stroke engine, like on a Honda Rebel.  I have the valve cover off, and it looks like i'm going to have to break the cam chain to be able to lift the head off to see the condition of the valves. And then find a link to replace it. Is that correct? And when I'm done, get all this lined back up again, which doesn't look to hard from watching the animations of how a 4 stroke engine works and turning over my engine, I got that part. Still, Bloody fucking hell....

[TheAlexManVideos]

@cobrachoppergirl To do this on a 4 stroke engine you do it exactly as shown. This would not ever apply to a 2 stroke. You don't break the chain. There is a cam chain tensioner somewhere. You loosen that as far as possible and then the chain will have enough slack to be lifted over the sprocket.

[iowaduckhunt]

great video, Im doing everything like you say on my sons z50ak2 but after I put back together I have zero compression at spark plug, actualy have suction and strong suction at carb opening. My son is driving me crazy to get this going and you seem to be the man, what do you think? valves? any advice would be great, Thank you

[TheAlexManVideos]

Check valve clearances. If that doesn't help, it could be the rings.

[spart4lyfe]

So to confirm, as long as my stator and the cam sprocket are both lined up right, the piston and valves will be in sync, or timed?

and my cam will naturally be within reach of where it should be because the valve springs will keep it only half way moveable?

(with spark always sparking)

I think if im reading right, that it will spark at the top of every stroke too?

I am about to do an 88 Big Bore kit, and Im pretty sure im right, but want to be completely sure before I start.

[TheAlexManVideos]

Yep. That's all correct.

[rolandcruz63]

thanks bro informative

[oSHOLLIVERo]

@cobrachoppergirl take off your chain tensioner dont break the fucking chain, look shit up before you break shit bro come on now

[Frederik19951995]

Do you have a video where you DISAMBLE cylinder and cylinderhead?

Would be very helpful!

[jakeb123211]

@WizzRacing thanks

[WizzRacing]

@jakeb123211 The sprocket has the mark on it. be sure you have it turned outside so you can see it. The chain has no mark to use. It can be used any where as long as the crank and cam sprocket are lined up. You can always check by looking at the valves for compression and exhaust is Top Dead Center or TDC.

[3134902]

@cobrachoppergirl 2 stroke engines do NOT use a camshaft you stupid piece of shit motherfucker son of a bitch

[TheKmk4420]

what about on a 125cc pitbike motor ?

[jakeb123211]

what happens if you dont leave a mark when you take the timing chain off the sprocket will the timing be off

[Gianniskapio7]

the t mark s in which face of the motor?

[nossey06]

heyy my timing was off by like one tooth so i tryed changing it but i dont know what i done but now my pitty sounds like a lawnmower and wont go when i put it in gear. i turned the cam abit when the sprocket was off does this matter ?