Oh - THAT guy...
Join Date: Dec 2010
Location: Lowell, Oregon, USA
If you are talking a spray gasket remover it should be aluminum friendly since so many parts are made of it. My Mustang ('83) had an aluminum timing cover and I am sure I used it there, but check the label. I prefer to scrape then off (new razor blade or plastic. See what works and go careful) or use a scotch brite type pad. A very thin coat of RTV grey (the most coolant resistant) will easily seal any imperfections created or existing.
Brake cleaner should also be fine as some calipers are aluminum. I would spray a rag and wipe because that stuff really shoots out and is not that paint friendly.
With all the stuff off you can pour distilled water through the system to help remove any sediments. You could use a hose, but there are minerals in tap water that can lead to corrosion. Since the cooling system is so small, a gallon of distilled should get a fair amount out of the block and be easy to catch in a pan.
Vote one for year-round riding! Austone Darksider PVT (Passenger Vehicle Tire)
Most recent Wing: 128k+ on the 2000 GL1500 SE (Just totaled) due to being rear-ended...
Current ride (for now) 2015 Triumph Trophy SE
Avatar- 1963 Kenskill trailer
Previous wings: '78GL1000, 13k mile '77 GL1000 (resto at home, neat story!), '81 GL1100 Interstate.
Previous non-wings: CB360T, Suzuki GS550L, Yamaha 650 spcl (first bike!), Silverwing 500, Yamaha Spectre 1100, VFR700F, CB900 Custom.