Scooter Crankshaft Runout Check : 139QMB QMB139 50cc GY6 1P39QMB

4,523 views · Published 11 November 2013 · 0:52 · Indexed 21 October 2026

Channel: 49ccScoot · 2013 · Autos & Vehicles

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Checking the runout on my 139QMB four stroke scooter engine with a dial indicator. Shows roughly .001". The service limit from 2 different manuals is .1mm or .004".

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