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Discussion Starter · #1 ·
I’ve had a bad restoration job done on my 1971 K3 Honda CB350. The oil breather hose has a oil streaming out when starting the bike and leaving in idle. I’ve spend £2000 already and don’t want another company trying but failing costing me more.
I was wondering whether to cut my loss and just buy another engine. Thanks in advance

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F352479111483
 

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Well, if it's worth anything, this engine has signs that the mileage might be true and correct. The left crankcase cover (houses the alternator) and right crankcase cover (clutch cover) screws, from those I can see, look unmolested and the engine number does represent a CB350G. No way to tell about the top end but if the mileage is true, not likely to have been apart there
 

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Discussion Starter · #3 ·
The EBay seller says it came from a 1972 K5.
My bikes a 1971 K3 twin. Are they the same engine across that era?
 

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Yes, I don't think there's any difference between them at that point in the 350's production. The G model had the disc brake here, we didn't get the K5
 
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