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January 21st, 2016, 10:42 AM   #11
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Thanks for the reply Taffy, I haven't got around to taking off the head yet but I have good intentions of doing it this weekend.

Could you give me a price for 2 tappets, 2 intake and 2 exhaust valves please?

What do you mean you could save my rocker arm? Whats likely to be wrong with it?

I think I've got the relevant manuals via this forum, thanks though!
Joe.
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January 21st, 2016, 11:18 AM   #12
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The rocker arm assemblies have 3 wear areas;
The shaft bushing
The valve adjusters
The roller bearings
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February 6th, 2016, 09:48 AM   #13
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I finally got around to taking the head off today and it wasn't as bad as I expected.

The valves look the right shape to me, not 'tuliped' and the seats don't look too bad either. I'm hoping that they will be ok after a good lapping. The only questionable thing was a gummy black substance on the outside of the exhaust valves, although the whole exhaust had traces of this in it.

Valves:






Head:





Piston:



Cam shaft showing water pump oil seal. I think I'll replace the seal!



Complete album link

All comments very welcome, always glad of advice.

Thanks,
Joe.
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February 6th, 2016, 12:20 PM   #14
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SERIOUS OIL ISSUES, it would suggest piston is worn out and oil is bypassing the rings. very bad.

could be the exhaust valve guide seals are shot or just the oil from the piston is a shocker!

your HG is from the wrong CC. looks like a 95mm HG not an 86mm HG.

regards

Taffy
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February 8th, 2016, 01:05 AM   #15
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Ok thanks Taffy. Do you stock the piston rings? Can't find them on your website.

I did put oil into the cylinder when I was compression testing it so maybe that contributed. Although the exhaust was gummed up long before that so I think it has been like it for a while. If it was the piston rings, would the compression test have still been bad if I put oil into the cylinder?

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February 11th, 2016, 12:13 PM   #16
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I would have done it without. my experience is that a compression tester is an unreliable thing. they make the good look bad without necassarily making the bad look bad!

always go for a new piston. they only last 150 hours so you're there before you know it!

regards

Taffy
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