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I started the restoration with the engine for two reasons first of all I thought that this would be the most expensive part. (I was wrong at about six hundred dollars the engine was not that expensive) second the engine and box had both seized. The gearbox just needed freeing up the engine though needed a lot more work. | |||
The first job was to pull down the motor and box and find out what was what. The Gearbox was in pretty good condition the selector had seized but other than that not to bad at all. the seized selector was a easy fix take it out clean it up, lube and reassemble. The engine on the other hand was another story the first thing I saw when I took the right hand side cover off was that the oil pump was laying at the bottom of the engine apparently having seized and then broken off. As the engine came apart the news didn’t get any better. The engine had been apart before and the work had been done very very poorly. The wrong main bearings had been used . These bearings had nether oil holes in the inner race or a locating groove in the outer race The lack of a oil hole meant not only the bearing did not have a oil feed but that the oil flow though the whole motor would’ve been affected ) |
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As for the locating groove the genius who did the work last time got
around this by screwing a self tapping screw in to the casing to lock
the bearing in place. Luckily the damage to the casing was not to bad. Other than that the big end bearings were shot (the wrong mains wouldn’t have helped this) new pistons and rings and new exhaust valve were needed. I got lucky in that when I got the bike I also brought three boxes of parts in one of the boxes was a oil pump and a spare crank this solved the oil pump and big end problem. I was able to get new the main bearings , pistons and rings ( the pistons are not the original the only difference being a longer skirt and smaller gudgeon pin hole a easy job for a good engine shop |
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| This is the finished engine as you can see I finished the engine by painting the bore with black high temperature
paint. I'm pleased with the end result |
 to get a better look |
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