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1971 CB500K0 Resto 3/71 VIN 1000896
Trigger:
Have come across this problem with the needle roller on a couple of the early 500K0 engines. Check to see if you have these parts fitted : oil guide plate 23106-323-000 and bearing plate 23102-323-000. The ones I had needle roller problems never had these fitted.
AshimotoK0:
--- Quote from: Trigger on February 21, 2016, 12:06:58 PM ---Have come across this problem with the needle roller on a couple of the early 500K0 engines. Check to see if you have these parts fitted : oil guide plate 23106-323-000 and bearing plate 23102-323-000. The ones I had needle roller problems never had these fitted.
--- End quote ---
Got the 2nd item Graham as I remember taking it off yesterday. Didn't see the first one though, pretty sure the engine doesn't have it fitted.
AshimotoK0:
This is for anyone who doesn't already know this CB250 & 400/4 parts on CB500K0. There are also a few small parts that are CB450 and c72 CB72 parts too.
400/4 parts are available from Yamiya but sadly they don't do parts for the 500.
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Trigger:
--- Quote from: AshimotoK0 on February 21, 2016, 01:06:39 PM ---
--- Quote from: Trigger on February 21, 2016, 12:06:58 PM ---Have come across this problem with the needle roller on a couple of the early 500K0 engines. Check to see if you have these parts fitted : oil guide plate 23106-323-000 and bearing plate 23102-323-000. The ones I had needle roller problems never had these fitted.
--- End quote ---
Got the 2nd item Graham as I remember taking it off yesterday. Didn't see the first one though, pretty sure the engine doesn't have it fitted.
--- End quote ---
If the oil guide plate is not there Ash, you were lucky to get away with just the bearing. I have done a couple that the needles have got so hot that they were burnt and the shaft had to be replaced. The oil guide plate holds the oil long enough to lube the roller bearing.
AshimotoK0:
--- Quote from: Trigger on February 21, 2016, 02:40:38 PM ---
--- Quote from: AshimotoK0 on February 21, 2016, 01:06:39 PM ---
--- Quote from: Trigger on February 21, 2016, 12:06:58 PM ---Have come across this problem with the needle roller on a couple of the early 500K0 engines. Check to see if you have these parts fitted : oil guide plate 23106-323-000 and bearing plate 23102-323-000. The ones I had needle roller problems never had these fitted.
--- End quote ---
Got the 2nd item Graham as I remember taking it off yesterday. Didn't see the first one though, pretty sure the engine doesn't have it fitted.
--- End quote ---
If the oil guide plate is not there Ash, you were lucky to get away with just the bearing. I have done a couple that the needles have got so hot that they were burnt and the shaft had to be replaced. The oil guide plate holds the oil long enough to lube the roller bearing.
--- End quote ---
The guy in York who advised James and then me on the early case VIN's reckoned that there was an inherent gearbox problem that probably 'saw off' a lot of those 1st issue bikes. Maybe that was it Graham? It just proves that with these old bikes that it's prudent to give the engines a full strip down just to be on the safe side. I suppose with a 2-stroke that goes without saying but a lot of people I think believe you can just get a low miler 4-stroke import from DK, ultrasonic the carbs and away you go. That camchain tensioner with PTFE pad slipper on the guide looks like the best design of tensioner I have seen on a Honda. Or does it have it's own problems?
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