Oil cooling has excellent serviceability, so things go smoothly. Sometimes when the connecting rod position is bad and the primary reduction can’t be removed, I think “my luck is bad.”
It was neither very clean nor very dirty—somewhere in between (50,000 km).
Somewhat of a tough challenge! The diaphragm spring holder trap.
Around the GSF1200 era, there are 3 bolts. Later models become even more difficult with 2 bolts. The diaphragm clutch spring tension is quite strong, so “you can easily strip them.” Most people probably end up drilling them out. *I’ve experienced this myself.
Using a tool like this prevents stripping and allows smooth work. It’s a bit of a hassle to make, but once you do, the work goes smoothly.
Replacing at 50,000 km as preventive maintenance for the future.
Large bikes actually don’t wear out the clutch much. Slip clutches don’t wear out unless used excessively. The real issue is “friction material degradation” rather than wear. Friction material becomes old and hard → doesn’t grip → slips/burns/warps.
It’s similar to how brake pads that don’t grip will burn if you brake too hard for too long.
When GSX-R gets this old, the friction material can peel off in chunks. It’s good to replace it before that happens.
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