Suzuki Quad Runner Spark And Valve Lash Adjustment

[@brucebfd]

Thank you for the valve adjustment tricks.. Now I understand more.. Thanks

[@bms250ford]

Thinking more about the valve adjustment being tight. As the head of the valve closes by spring pressure, it wears the valve seat and valve face, raising the valve stem as it pulls into the cylinder head. This reduces the valve clearance over time and will begin to prevent the valve closing fully and therefore effecting the cylinders compression. Wear of the Cam and Rocker surfaces would tend to loosen the valve clearances but this must be insignificant compared to the valve face and seat wear.

[@yewwtooob]

Yep. Seen it happen many times.

[@johnmills7565]

You are correct and this causes a lean mixture and acts as a vacuum leak. When this occurs you will notice the header pipe glow from the lean hotter mixture

[@smorley99]

Oh I wish I would've marked the re-coil when I did this last time!!!! I'll do it next time for sure.

[@grantmcghie9134]

Great explanation of the work john. Just a few comments that are not that important. 1. Did you think of doing a compression test. 2. I use .05 and 0.1mm feeler gauges and bend the ends (I like tool mods). 3. The tappets should wear loose so agree someone has tightened them up. My gs850 has shims and they wear tight as the valve faces wear more that the shim cam interaction. 4. I would counter sink the battery screws , as just temporary ok. 5. those farm bikes normally have battery earth problems as the cow manure corrodes earth frame connections. Good video liked the valve adjustment using the pitch method.

[@bms250ford]

1. I don't have a compression tester. Yes that would have confirmed my suspicion. Others have reported tightened valves. How it happens is a mystery to me. 2. I don't have 2 or 4 thou feeler guages. I should get a set that does. It is difficult to get the feeler under the tappet and get an accurate reading.

[@RocksNRuts4]

23-28 is that different then the cam chn tensioner?

[@bms250ford]

Not sure what mean?

[@RocksNRuts4]

@@bms250ford u said cam adjuster, curious if same thing

[@bms250ford]

@@RocksNRuts4 Watch this video if you don’t get what is going on inside the cylinder head. kzbin.info/www/bejne/mYKxmn6Dd5qlfJY

[@pedritoc.c.t.665]

I'd you our a plastic bag little pressure on the spark plug hole and turn it it will pap the bag out at tdc

[@rodgerbaseman107]

What is schmidt's 16 spelling

[@bms250ford]

Schneids15

[@richardmassey4206]

Buy a power sprayer.

[@kyleallport7465]

Can you just get to the point