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That is, of course, very sensible. The slave is certainly easier to remove than getting to the clutch assembly, but still best achieved with the swingarm off (not a horrible job with a lift and a platform jack) and some fresh, sharp hex drives for the three fasteners that tend to be stubborn.

Thanks for your replies guys. Here is the unfinished project

It's been cr@p here for weeks.... This last lockdown was a complete PITA. Windy, continual rain/drizzle, just pants! The noise didn't start immediately, which is odd. It started after I got out of the drive...

Dorset, UK Ten day outlook: Mon53°46° thru Friday 54°48° Sat51°44° Sun49°44° Mon

Clutch release/ "throw out" bearing seems very plausible . There is certainly no very much to it. Good news is that it is accessible beneath the slave cylinder rather than having to pull the entire gearbox . . .

Does anyone know which oil pipe union on the front of the engine, is the return from the oil cooler? I am building a Triking with a V11 Sport engine and want to mount the oil cooler vertically, so want the return from the topmost union.

Oh, that is delightful!! Love the "period" valve covers . . . I would think the V11 6speeder gearbox and bevel drive ratios will be very lively and well matched to that application. As well as the V11 camshaft!

As soon as you got going enough to scrub off the rust?

I suspect it may have been a little surface rust on the flywheel. It's not moist and cold in Dorset is it?

Personally I can't see how this has any relevance at all. Thermo-syphoning effect in a pump circulated system is largely irrelevant. A pressurised pump driven automotive cooling system is arranged the way it is because of gravity. Any system with a pump in it is going to feed from the bottom of the reservoir (which the heat exchanger is in many systems) even if it runs at room temperature. Nothing to do with thermo-syphoning. It's true that if you were running a pure thermo-syphon system then you would organise it this way but the Guzzi oiling system isn't that sort of system. My car has the usual automotive cooling system but additionally uses Thermo-syphon to get heat out of the turbocharger housing when you shut the engine down. In addition the Guzzi has a thermostat that bypasses the oil cooler unless the temp is at a pre determined level. You can arrange the oil feed and return for the cooler any way you want the only thing that might be desirable is the have the cooler mounted horizontally with the feed and return to the top purely so the oil in the cooler doesn't have the tendency to drain back to the sump on shut down. All it would mean is a slight delay in building oil pressure on a hot start at worst. Nice to do but not essential. Ciao

The Parts Catalog indicates the left side line is the return. Some Elvan siren in my brain always brings me back to the idea of mounting a Guzzi big-block on a "Moggie" trike. I do hope you will let us in on how your Triking comes along!

Cash1000 visited for a dipstick exchange, and to look sadly at my bike. That Rosso Mandello really looks great in the sun.

I worked it out,