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3YF rebuild and fairing remake

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Red_Lion

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Location: Moscow,Russia

Post Sun Jul 16, 2017 2:14 pm

Re: 3YF rebuild and fairing remake

It's strange. Like there should be a valve.
Image

Founded broken valve cotter.
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And valve :( Guide also broken.
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Mezo

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Post Sun Jul 16, 2017 10:02 pm

Re: 3YF rebuild and fairing remake

Wow :huh:

First dropped valve ive seen on an XT.

Mezo.
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jibber

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Post Mon Jul 17, 2017 6:46 pm

Re: 3YF rebuild and fairing remake

Whats the piston and conrod like?
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Red_Lion

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Post Wed Jul 19, 2017 7:02 am

Re: 3YF rebuild and fairing remake

Mezo wrote:Wow :huh:

First dropped valve ive seen on an XT.

Mezo.


Used cylhead from szr660. So techical still no droped valves on XT :)
Last edited by Red_Lion on Wed Jul 19, 2017 7:10 am, edited 1 time in total.
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Red_Lion

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Post Wed Jul 19, 2017 7:09 am

Re: 3YF rebuild and fairing remake

jibber wrote:Whats the piston and conrod like?


Piston. Marks from valve and lot of fresh burned oil.
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Conrod looks like survived - straight and no backlash.
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Red_Lion

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Location: Moscow,Russia

Post Wed Jul 19, 2017 11:53 am

Re: 3YF rebuild and fairing remake

In general, now the picture of the breakdown is as follows: the cylinder head bought from last summer from szr660 was with a worn out guide or with a liltle bented or "repaired" valve. On the damaged valve in the upper bend area there is a characteristic roughness - the valve was skewed for a long time even more recognizing the guide making the cap unworkable after some time.

Unfortunately, I missed it - just checked the fit of the valves and replaced the cap. Symptoms of what was happening also misinterpreted - the valve was constantly pounding like on little-big clearance, but i think only what make adjust not well.

Now waiting new guides, valves, cotters, caps and springs (why not? :) and will try fix cylhead. Alrady got chinese cylinder+piston+gaskets kit for grizly - cylinder looks "not bad" (just small scratches inside like from "testing diameter by insert piston with no oil"), but piston maked ugly - small gas caverns on one side near oil ring and oil channes drilled wrong. Will try use old STD piston with this kit.
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