CB550k1 US Import - UK registration

[juitz]

One journal has less clearance to reduce end float, cars have specific thrust washers but then they also have clutch end load

Ok, phew! Yes this makes perfect sense!

[Bryanj]

Oil is fed from the gallery in the lower case to the mains then via crank drillings to the ends, holes go from top case upwards to cam so they have holes, never followed the holes on 2 and 4 but suspect feed to box or something

[Oddjob]

Think they go to the little ends Bryan via the crank drillings.

Juitz, just checking but do your crankcase markings (on the bottom rear crankcase) have some letter A's.

[juitz]

Think they go to the little ends Bryan via the crank drillings.

Juitz, just checking but do your crankcase markings (on the bottom rear crankcase) have some letter A's.

Yes they're faint but all of them have a 1 & A stamped

[McCabe-Thiele (Ted)]

I think Ken is refering to the  5 letters stamped at the rear of the lower engine casing it will consist usually of A or B with the odd letter C.
Mine are AABBB its usually very visible in the alloy surface.

[juitz]

Ah sorry, my mistake!

These are BAABA


Used a Vernier to measure the crank diameters and all were >32.99mm with the exception of the diameter at the rotor end that was around 32.986 / 32.988 so put this down as 32.98

Using the selelction table is the manual I got the bearings for the crankshaft journals as:
2x Brown (Table 2/B)
2x Green (Table 1B)
6 x Yellow (Table 1A)

[Oddjob]

Ok, just checking, without any A's on the stamping there can't be any yellows, only 1A gives a yellow shell.

[McCabe-Thiele (Ted)]

One journal has less clearance to reduce end float, cars have specific thrust washers but then they also have clutch end load

Thats an interesting factoid Bryan.

[juitz]

Right, stripping paint and cleaning engine casings and covers. What are the recommended processes?

I've tried to do a little test on the oil filter cover with nitromors to strip paint and also soda blasting but nothing much gained. Nitromors didnt touch the paint.

I thought vapour blasting might be the way to go to get the cases clean and ready for paint prep, but not sure if I need to get the paint professionally stripped before hand?

[Sesman]

Acid dip?

[McCabe-Thiele (Ted)]

I do a degreasing petrol wash in the outside, same on the inside with a stiff bristled brush. Then I use Industrial Grade paint stripper - usually needs stripping twice if it's been over painted. Wash off paint stripper.  Then it's a final clean of the casing externals using a brass brush if required. Then I clean all the bolt threads out with fine bottle brushes & cotton ear buds. Final flush through all the oil galleries using bottle brush and clean petrol in a syringe. Clean externals with thinners. Then I paint the cases - oven cure. Final check of internals for dog hairs etc. I use acid proof gauntlets, eye protection & appropriate face mask with twin filters.

[juitz]

Hi Ted,

Where do you get the industrial paint stripper? All info says this is hard to get?

There is a local place 3mins from here that will do acid dip and vapour blasting, so will hit them up for a quote.

The transmy countershaft has some corrosion, and it has a seal that isn't listed separately in the manual. Assume this is cleaned up and left as is generally?

[Bryanj]

Have you looked in parts book for the O ring?

[Oddjob]

It's a 24.5mm O-Ring, part number 91306-703-000. Part number 27 in the parts book. The collar will come off as well if you want to remove it.

[juitz]

I'm gonna admit being a total dummy.

I did not notice the parts book, only the user/owners manual.
I've been using CSMNL for parts lists, but the books look to be much better source.