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<blockquote data-quote="SRAD97750" data-source="post: 142800" data-attributes="member: 425">Cleaning. Measuring. Detective work.[ATTACH=full]17153[/ATTACH]&nbsp;[ATTACH=full]17155[/ATTACH]&nbsp;&nbsp;Reeds look good.[ATTACH=full]17156[/ATTACH]&nbsp;[ATTACH=full]17157[/ATTACH]&nbsp;&nbsp;Intake boot is surprisingly flexible and crack free.[ATTACH=full]17158[/ATTACH]&nbsp;&nbsp;Powervalve assembly out for fresh orings.[ATTACH=full]17159[/ATTACH]&nbsp;&nbsp;Measuring piston ring end gap. Still in spec. Need to check again after winter.[ATTACH=full]17163[/ATTACH]&nbsp;[ATTACH=full]17165[/ATTACH]&nbsp;[ATTACH=full]17162[/ATTACH]&nbsp;&nbsp;OK. So. DETONATION. This badboy has seen some hard times. Seriously hard times. At one point the engine chewed itself to bits. Evidence below.[ATTACH=full]17154[/ATTACH]&nbsp;&nbsp;In this photo you can see where the cylinder was just rat chewed away, and a fresh steel liner was installed. [ATTACH=full]17164[/ATTACH]&nbsp;&nbsp;Looks like the problem has been repaired properly and a new piston installed. (Which has totally different damage<img src="https://www.dirtbikeaddicts.com/static/images/smilies/noidea.gif"&nbsp; class="smilie" loading="lazy" alt=":noidea:" title="Noidea&nbsp; &nbsp; :noidea:" data-shortname=":noidea:" />) &nbsp;Tomorrow I assemble with some fresh oil, new carburetor, gaskets, and some fresh 91 octane.-BIG DAN<img src="https://www.dirtbikeaddicts.com/static/images/smilies/thumb.gif"&nbsp; class="smilie" loading="lazy" alt=":thumb:" title="Thumb&nbsp; &nbsp; :thumb:" data-shortname=":thumb:" /></blockquote>

[QUOTE="SRAD97750, post: 142800, member: 425"] Cleaning. Measuring. Detective work. [ATTACH=full]17153[/ATTACH] [ATTACH=full]17155[/ATTACH] Reeds look good. [ATTACH=full]17156[/ATTACH] [ATTACH=full]17157[/ATTACH] Intake boot is surprisingly flexible and crack free. [ATTACH=full]17158[/ATTACH] Powervalve assembly out for fresh orings. [ATTACH=full]17159[/ATTACH] Measuring piston ring end gap. Still in spec. Need to check again after winter. [ATTACH=full]17163[/ATTACH] [ATTACH=full]17165[/ATTACH] [ATTACH=full]17162[/ATTACH] OK. So. DETONATION. This badboy has seen some hard times. Seriously hard times. At one point the engine chewed itself to bits. Evidence below. [ATTACH=full]17154[/ATTACH] In this photo you can see where the cylinder was just rat chewed away, and a fresh steel liner was installed. [ATTACH=full]17164[/ATTACH] Looks like the problem has been repaired properly and a new piston installed. (Which has totally different damage:noidea:) Tomorrow I assemble with some fresh oil, new carburetor, gaskets, and some fresh 91 octane. -BIG DAN:thumb: [/QUOTE]

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