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Old 02-25-2009, 04:59 PM   #25
Intermittent Excursionist
Timeless's Avatar
Joined: Feb 2009
Location: Cape Cod, MA
Oddometer: 98
before you go tearing into the bottom end....Possibly the owner messed something up in the top end area that caused the cam/lifters to wear....I dont know about xr's but some of my old bikes had external oil lines to bring oil to the top end...also no valve seals could be an issue..could lose alot of oil and make it smoke....usually when an engine starves of oil, the piston will seize first because that is what has the most heat/friction...and your bore and piston look ok. Another thing.....Even if the bike was completely run out of oil, most lower end bearings, crank included will survive much longer than the piston, etc and usually dont need to be replaced in this situitation....check for freeplay/slop in the crank before u tear into it.
"Like all great travellers, I have seen more than I remember, and remember more than I have seen."
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