clutch lever pressure


Information and questions on GL1200 Goldwings (1984-1987)
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flash1942
Posts: 129
Joined: Fri Jan 24, 2014 4:37 pm
Location: Midwest
Motorcycle: '84 Aspencade

clutch lever pressure

Postby flash1942 » Sun Oct 26, 2014 8:55 am



My '84 Aspy's clutch lever is quite stiff and the master and slave has been rebuilt by the PO. My question is; can another master cyl be used to make the lever pressure lower? If so what and where?



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WingAdmin
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Re: clutch lever pressure

Postby WingAdmin » Mon Oct 27, 2014 11:57 am

Unlike brakes, you can't do a whole lot with a clutch. With brakes, you can use a larger master cylinder bore, which amplifies the pressure exerted by the brake caliper (at the expense of the amount of motion of the caliper pistons), giving you less lever pressure. However, a clutch really needs a specific amount of movement in order to properly disengage. You can put a larger bore master cylinder on your clutch, which will lessen the lever pressure, but it will cause the slave cylinder's piston to move less, which means your clutch won't fully declutch. This will cause hard shifts and down the line, transmission problems.

You could try putting a longer lever on, and grab the lever farther out, to try to give you a mechanical advantage that way. You'll be pulling the lever in farther (more travel), but will have less force to pull against.

flash1942
Posts: 129
Joined: Fri Jan 24, 2014 4:37 pm
Location: Midwest
Motorcycle: '84 Aspencade

Re: clutch lever pressure

Postby flash1942 » Tue Oct 28, 2014 4:40 pm

Yeah, I am aware of the mechanics of hydraulics here. Being an old bike I was thinking someone may have tried a master cyl from another bike that is 1 or 2 mm smaller, which would make it a hair lighter and not affect the throw-out distance much.


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