Question about 2005 Honda CR 250 R
The "clunk" sound you hear are the "dogs" and "slots" on the gears engaging when you shift. All of your bikes have a "constant mesh" transmission which means ALL of the gears on the main shaft are meshed with ALL of the gears on the counter shaft ALL of the time. Any "clunk" or "grinding" sounds you may hear while shifting are coming from dogs and slots trying to line up and engage.------The transmission clunking while shifting is more likely caused from clutch not disengaging properly than from the gearbox itself. Clutch adjustment, primary oil level or condition would be the likely cause.
Check the clutch action. Put the bike up on the center stand, and
ensure that the rear tire doesn't rotate when holding the clutch in
fully, in any gear. If the clutch isn't releasing fully, there may be a
touch too much pressure on the engine side of the transmission for a
quick/smooth gear change. --------- The viscosity of the oil and / or the "dirt" in the oil - (or any
combination of the above) MAY cause the clutch things to hang when you
shift -This can also cause clunk or other noise.Replace the oil will exact recommended for your model. ------------- This troubleshooting will help.Thanks.Helpmech.
Posted on May 22, 2011
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Posted on Jan 02, 2017
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