February 10, 2019
Hi all I took the plunge and completely rebuilt my 1966 d7 New bearings ,New oil seals ,New primary chain and had the crankshaft checked over.l put the engine back on bike on Sunday it started3rd kick and it ran quite well I have not rode it yet.I cannot believe how well it has all gone so far I'm just waiting for something to go wrong I'm just wondering do I have to take it easy for a while because of New bearings many thanks Joe.
June 23, 2013
Well done. It does make you feel good when things turn out right. It is certainly better to have a short bedding-in period after a rebuild. Not 'running-in' as that is mainly for the benefit of the cylinder & piston, which have not been changed. Bearings should not need any running-in, nor seals, so it is more a case of checking everything works as it should at varying loads before going flat out. Suggest you run it up and down the gearbox, at reasonably high revs, for a while. Check all your engine mount bolts for tightness, together with the cylinder head and exhaust nuts when the engine is good and hot.
1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250
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