. . .you adjust the two nuts on the clutch rod that goes through to the clutch so that you have 5 mm of free play on the clutch handle before it starts to pull.
Free play is adjusted at the
hand lever—not as your description seems to convey. The recommended amount of hand lever free play for a K75 is generally 2.0mm +0.5mm. Although Clymer has a generalized spec of ~3-5mm undifferentiated among models, I tend to go with factory specs.
There are two levers involved in a basic clutch adjustment. One is the
clutch lever—a lever hinged on the rear of the transmission into which an adjustable bolt has been mounted that engages the clutch rod piston inside a boot mounted on the transmission. The other is the handlebar
hand lever that operates the clutch lever.
My basic clutch adjustment goes like this.
- The clutch cable is disconnected from the clutch lever.
- The cable length from the edge of the barrel where the cable sheath and cable emerge to the cable's clutch lever attachment nipple is set to approximately 75mm using the hand lever's cable adjuster. (The term approximately is used because with some K75 motos that length must be modified slightly to prevent the outboard end of the clutch arm from clacking on the muffler when the hand lever is released.)
- The cable is reconnected to the clutch lever.
- At its inboard transmission end, the clutch lever bolt's lock nut is loosened then the bolt is back out until it doesn't touch the clutch rod piston.
- The clutch lever bolt is tightened until it just touches the clutch rod piston but exerts no further pressure upon it.
- The clutch lever bolt's lock nut is tightened.
- Free play at the hand lever is adjusted using the cable adjuster until it measures 2.0mm +0.5mm. Too much free play will cause difficulty shifting; too little free play will cause the clutch to slip. The clutch wears during use so free play adjustment should be checked regularly when the moto is used extensively.
All this can be found in manuals downloadable from here.
A slipping clutch can be inconspicuous. If fuel economy at speed seems to be lessening but the engine seems to be running well, the spark plugs look good, and you haven't been packing on the pounds at mealtime, the clutch is likely to be slipping. Try readjusting it.
It's time to break for café cubano and a discussion of hair styles among world leaders and candidates for world leadership.