Seized Clutch

[Wagonwheels]

A bike that is stored for some time (owner probably servicing carbs, replacing broken pieces or fiddling with spark plugs) will inevitably have a seized clutch.

Its what they do.

So apparently the solution is strip down clutch. remove all the plates, throw the lot into the bin and buy new ones, preferably genuine Honda pieces if you can find them. while there, probably good idea to replace springs just to be sure.

However there might be a secret liquid that when used instead of oil will release stuck plates like magic without stripping down . Then replace the oil and the clutch works like it should. not a Honda NOS part in sight.

It is a dream I have

All suggestions gratefully received.

Many Thanks

 

[ancientdad]

My trick is to hold the clutch lever in while the engine is idling during warmup (my DOHC 450 has to be warmed up at least 1 to 2 full minutes to ensure full oil flow to the expensive top end parts). I alternate between holding the lever in and pulling/releasing the lever a few times while waiting during warmup, and by the time I go to put it into first gear for the first time in a month or so, it is usually freed up by then. If not, the worst thing that happens is it stalls the engine (fingers on the front brake lever just in case), so I restart it and the next time it goes into gear normally.

I have never taken a stuck clutch apart to free the plates. You can also put the bike in second or third gear, engine off, and hold the clutch lever in while rocking the bike forward and backward, and that will often be enough to release the oil suction on the plates.

 

[EzPete]

Ditto to AD’s experience. Warm oil goes a long way to loosening those up.

 

[WintrSol]

My bike has been stored for about 8 months, maybe more, until this week. Clutch was not stuck. That said, I might consider clamping the lever in the released position if it appears it will be longer. I know the springs won't like it, but as long as it fully engages, it's all good.

 

[Greybeard70]

In my experience, removing the clutch plates and cleaning them with brake cleaner, will remove most of the goo causing the sticking problem. Then reassemble in reverse order of disassembly.

Also, back in my dirt bike days (mid 70's) if they were slipping, we would lightly sand the surface of the plates with whatever sandpaper was on hand to remove any gloss and then flipping the plates over from the way they were originally installed.

OR - You can just remove the side cover and spray brake cleaner on the clutch while pulling the lever in, to open gaps in the contact surface. Some would probably say to coat them with oil after cleaning, but since they run in an oil bath I don't really think it is necessary.

 

[mike in idaho]

More often than not, kicking the kick starter lever several times with the lever held in, will free the stuck plates. If that doesent work, try tying the clutch lever back to the handlebar overnight, then kick it.