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kb22 Liked a reply to forum topic 2020 YZ250f top end rebuild question?
2/1/2021 4:52pm
Can have it balanced,trued, and welded by crank works for that price. Thing would be absolutely solid afterwards.
This forum topic has 17 replies.
1225dirtflinger Started a new thread 2020 YZ250f top end rebuild question?
2/1/2021 4:32pm 2020 yz250f Had 2 exhaust valves drop , had everything in the top end in a jam. Timing chain , cams the whole 9 yards. I took everything apart free the cams and timing chain. Broke down rest of the top end also checked the cylinder was good crank and rod was good. I am replacing the piston / rings...
This forum thread has 17 replies.
1225dirtflinger Added a reply to 2020 YZ250f top end rebuild question?
2/1/2021 2:04pm All good I don't mind paying 360.00 more dollars for a new crank. To gain the comfort of knowing it is new and good to go. So guess crank , bearing , seals will be in the way as well.
1225dirtflinger Added a reply to 2020 YZ250f top end rebuild question?
1/31/2021 11:06pm Hope it's ok like I said before I pulled the cylinder it pushed the piston up and down just fine with no resistance or abnormal binding that I could feel.
1225dirtflinger Added a reply to 2020 YZ250f top end rebuild question?
1/31/2021 11:01pm
1225dirtflinger Added a reply to 2020 YZ250f top end rebuild question?
1/31/2021 9:28pm I am sure they did just was thinking if they were damaged in any bad way I would feel it in the crank as I rotate it over and over. But it's just as smooth as can be. Should have noted before now also that when the bike locked up it was in a corner and not on any wide...
1225dirtflinger Added a reply to 2020 YZ250f top end rebuild question?
1/31/2021 8:44pm Yeah I have looked at that crank over and over. Checked the tolerances with filler gauges , checked it over and over for it being bent. Crank bearing is still smooth like butter. No I mean zero medal in the oil when it was drained. I didn't think it would matter as long as the marks where lined up but...
1225dirtflinger Added a reply to 2020 YZ250f top end rebuild question?
1/31/2021 6:49pm The rod went up and down with the piston in the cylinder find and free of being in a bind in anyway. Rod had very little side to side play I know that's normal. Had no up and down play at all rod was straight as an arrow.
1225dirtflinger Added a reply to 2020 YZ250f top end rebuild question?
1/31/2021 6:46pm Less then 60