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Not smooth shifting - Cb 400 F Honda Motorcycles

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Adjust clutch cable so it propally engages then try this if not change the gear oil to a different oil e.g silkolene

Posted on Sep 08, 2009


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86' silverado, automatic. On occasion have issues shifting from park to drive. Check fluid and changed filter. I believe a probable shifting cable adjustment. Transmission runs and shifts smooth ot

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Rear deraileur shifts to bigger cog smoothly, but not smaller

Could be a few things. Either are common on a bike with this amount of use.

  1. If you have been adjusting the tension of the shift cable, it may be a little too tight. This will provide the snappy up-shift but not allow the derailleur to travel outboard enough to execute the down shift. Loosen the cable by turning the barrel adjuster to the right a notch or two until the shifting is satisfactory.
  2. The shift cable may also be rusted or oxidized. It is common for galvanized cables to be used to cut costs on a new bike and they eventually rust or corrode. These do not provide smooth shifting operation and will eventually result in sluggish down shifting due to increased friction. Replacement is the solution.
  3. The cable housing (black casing that the silver inner wire runs through) may have gotten some dirt or other contaminant inside of it increasing friction. Cleaning or replacement is the solution.
  4. The inner cable may have become kinked - also increasing friction. Usually this results in slow shifting both directions; so this is the least likely. Replacement is the solution.

Stainless steel shift cables are the best to use and run about $5-10 each. New sections of cable housing usually run about $2 per foot.

I hope this helps!

Matt @

Oct 16, 2012 | Cycling

1 Answer

Often the transmission does not shift smoothly. Sometimes it will shift smoothly.

Mine used to do the same thing, i changed fluid and filter and added a bottle of lucas, has worked fine for 2000 miles so far.

Jan 08, 2010 | 2001 Oldsmobile Aurora

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Our car does not shift up from 2nd gear. We had a power flush done on our transmission but that did not fix the problem. We were told to check our shifting module... is this a possibility? The car has been...

chrysler issue,u are not the first,replace the transmission modualator valve,its externally mounted,(its a vacuum diaphram) sounds like its ruptured.

Oct 03, 2009 | 1993 Chrysler Imperial

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Trans shifts very hard after 5 minutes of stop and go traffic

A reason for hard shifting could be a problem with many things with various degrees of seriousness. It could be your ATF( automatic transmission fluid) is low or broken down and old. This would cause the hardness and the reason for stop and go traffic effecting it. Another possibility is your transmission is just shot, and the timing gears inside are worn and not properly shifting at the correct RPM causing a **** during shifting.

Some possibilties, not all!


Mar 27, 2009 | 2003 Buick LeSabre

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92 Taurus-Not shifting into 1st, but once engaged, shifts smooth

Had that problem on a 93. There is a plastic piece inside the trans that cracked and needs to be replaced...=...Trans rebuild.

Mar 25, 2009 | 1992 Ford Taurus

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