Clutch lever adjustment

Sparebiker

Joined
Mar 23, 2026
Messages
7
Age
66
Location
Duluth
Bike
ST1300
Well, this was no fun. I just bought an 03 ST1300, drove it home a couple of weeks ago and was stymied by weather ever since, well a few projects as well. Finally a sunny if not chilly day , gear up (42F), roll the bike out of the garage, warm it up, slip it into gear and it takes off without the benefit letting the clutch out. That got exciting. Good thing I did not attempt this pointing forward in the garage.

The bike came with no manual and haven't had time to look for one. A short and unhelpful search here and the general Internet came up with nothing. How does one adjust the clutch engagement in relation to the lever? When I bought it the clutch engagement was quite close to the lever pulled all the way in but assumed (sigh, yeah, I know) it was a PO preference, not a malfunction. It seems to disengage to a degree but not enough. Any thoughts?
 
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Check the fluid level and I would also bleed the clutch line in case there is air in the system. Is there any indication that any clutch work has been done?
 
Over time, the push rod that actuates the MC piston, will wear out the inside of the brass bushing in the lever and reduce clutch disengagement. OR you have air in the system OR the clutch slave cylinder could have an internal leak. The lever itself has no adjustment per se, other than making sure all mechanical parts are not worn, ie pivot point and bushing, MC internals and that slave cylinder.
 

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Many of these older bikes have seen little routine maintenance, in part because they are nearly bulletproof. The common 'issues' can be reduced to almost none if one follows the service manual and does said maintenance regularly. Brake problems (secondary master cylinder) and clutch problems are one of these commonly seen problems. For whatever reason, even the guys who bleed the brakes regularly will often ignore the clutch hydraulics, and a buildup of jellied old fluid and moisture can clog the clutch slave cylinder.

Hopefully a good bleed and checking (replacing if needed) the bushing at the clutch lever will solve your problem.

This article has some good information:https://www.st-owners.com/forums/threads/maintenance-items-needed-for-a-new-old-bike.176679/
 
Upon further inspection I found the reservoir was empty. Which matches up with the useful replies above. And it was empty which cannot be a good thing. I ran to town to get Dot 4 as I only had Dot 3, opened the cover and it was not only empty, but pretty grungy as well. Don't want or need another thing to work on right now, but here we are. With the fluid that low there has to be a leak somewhere so plastic removal and maintenance ahead. Now that I am thinking about it that is also likely indicative of PO's ambitions regarding maintenance in general. Thanks all.
 
Managed to get the old fluid out and clear fluid in. Bubbles galore, but expected that due to an empty reservoir. I have bled plenty of brakes over the years so at least I had an idea where to go with that. Fortunately being a bike and the bleeder being on the same side as the lever I was able to reach the lever to sync with the wrench opening the bleeder.

Went for an hour ride on a road that encourages me to exercise the clutch vigorously and it has worked very well. We'll see.
 
Did you make sure that the push rod is fitted into the hole in the side of the bush - the one in the clutch lever ?
Check it - undo the lock nut underneath, then unscrew the screw. Remove the lever carefully with a hand underneath the brass bush to catch it if it falls.
Check it over. Clean top and bottom and mark the position of the hole with an arrow or similar dran on the circular end of the bush.
Reassemble making sure the plunger goes into the hole. Fit the screw - just snug it up, then fit the locknut. Hold the screw and tighten the locknut

When bleeding the clutch pump the lever a few times. Hold in the lever, open the bleed valve slightly, lett he clutch mechanism push out the fluid, and secure the bleed valve before the fluid stops flowing. Repeat. If you don't do it that way you will never get clean fluid pushing out the grotty stuff around the sides of the slave piston.
 
Sparebiker said:
I have bled plenty of brakes over the years so at least I had an idea where to go with that.
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Since you have established that the PO was not a 'do-it-by-the-book maintenance guy, you might have to bleed the brakes too. In fact, it is more or less a cardinal rule here that you should change all the fluids upon taking possession of a new old bike. Bleeding the brakes on the ST is not like most other bikes. There is a 7 step procedure that you must follow.
The Honda service manual is the single best tool you can buy for the bike.

Here is a video: https://www.st-owners.com/forums/threads/st1300-replacing-the-brake-fluid-st1300-video.165466/
 
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