Bead or plastic?
Bob750 I used Harbor Frieght 80 grit, covered all the ports with a heavy grade gasket material with the side covers on to keep the glass out of the side case areas. After blasting, took the hose and sprayed the entire engine to eliminate any left over glass. Then pressure washed the engine again. After blasting, I took the side covers off, cleaned the inside of both cases, painted and put it back together. Before starting the engine, I plan to pour solvent or a light grade oil to flush out the engine from the inside. Just an extra measure of satisfaction to remove anything that might have gotten inside. Loud Mouse gave me the glass bead tip and you are right, it really looks like new. Probably not the wisest thing to do, blasting the engine as a whole unit, but didn't want to tear down the engine at this time. I may have to in the future but it was running quite well before I took the bike apart for restoration. We will see when it gets totally back together. The only paint on the engine is, the side covers, valley cover, and oil filler tube, the rest is raw metal.
Good luck and keep me in the loop as to your progress. Again, thanks Ed for the tip. Thanks for the info, Rickytic.
My engine's all apart for transmission work and I may have a go at the HF system.
Mine: '74 CB750 K4 -- Hers: '64 CA78
Had: '75 CB550 K, '79 CT90 I recently decided to give vapor blasting a try. I sent the parts out and they came back looking like new. What I really like about it is that it picks up no oil, grease or fingerprints. Everything wipes right off. Nice smooth finish. Not a porous surface like some other blasting techniques cab end up with.
Looks great Kevin. It appears that the glass beads might put the same finish on the parts, looks just like mine when I finished. The round glass appears not to destroy the metal and leaves the parts looking new. I would have preferred to have mine vapor blasted, but nothing available in my area that I could find, so I went with the second best option, I think!
Rick Kevin, can I ask where your vapor blasting was done and how they calculate cost? Your parts look great. I like the idea of doing my own blasting, but there's the cost and mess of doing it myself, and I don't really have the space to do it in. I'm going to look for companies in my area, but I could ship parts and just let that be the "cost" of doing it, if no one within driving distance of me does it. Thanks! Mine: '74 CB750 K4 -- Hers: '64 CA78
Had: '75 CB550 K, '79 CT90 They charge by the hour. It cost me $375 for all the pieces I had done plus shipping it there and back.
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