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Johnwrightphoto
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London
Joined: 02/01/2017
Posts: 8

Hello all

Finally decided to cross the line and attempt to adjust my valve clearances on my 53 R51/3. I have cold right cylinder at warm up and while, in truth, I’m a confused newbie who doesn’t know where to start Smile, I’ve decided that my first step should to at least look inside the right cylinder and check the clearances while I’m in there.

Anyway, first step and I’m a little concerned already Smile

Started removing the cylinder covers, and I have a deluge of oil on the garage floor that’s escaped from the gap created by loosening the covers.

All of my various research into cylinder maintenance hasn’t mentioned “look out for a dump of the black stuff” so I’m just reaching out to see if any of you have encountered this, if so what’s the issue, and should I press on regardless Smile

Any help, guidance or suggestions greatly appreciated.

John

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schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6540
I was a little confused, but

I was a little confused, but I think you're talking about removing the valve covers, one each side. Yes there should be some oil that comes out. Typically it's only a tablespoon or so. If there's more than that, maybe the oil that migrates to the valves is not find the drain hole back to the sump. It's supposed to just be splash oil inside the valve covers which drains back to the sump relatively quickly.

Engine should be over-night cold when checking the clearances. You should probably remove the spark plugs for this...makes it easier to turn the engine over. I usually put the transmission in 4th gear and then turn the rear while to bring each side to TDC on the compression stroke for setting the clearances. Very important that you watch the valve action so you can verify that the cylinder you want to adjust has the piston on the compression stroke. When the intake valve goes all the way open, then starts to close, you are on the compression stroke. It's only a matter of slowly moving the rear wheel or bumping the rear wheel with your right hand as you side on the left side of the bike staring at the timing hole...stop bumping when the TDC mark is in the middle of the window. Set valves...0.15mm intake and 0.20mm exhaust. Repeat for the other side. Then just for grins, repeat both sides and check your work.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

Johnwrightphoto
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London
Joined: 02/01/2017
Posts: 8
Kurt! Thank you so much!! Yes

Kurt!

Thank you so much!!

Yes I mean what you call the ‘valve’ covers. Forgive my newbie terminology Smile

I’ve got the cover off and there’s way more than a ‘spoonfull’ of oil (attached) , but perhaps that’s another issue for another day...

I’m going to follow your guidance to the letter. Thank you so much for sharing it.

John

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