Honda-SOHC

I'd complete an more in depth version of Bryan's assessment.

If you've transmitted any grit or other debris into the bearing by cleaning, then they can sound bad.

Really wash it independently (only tgat shaft and bearing) with something like paraffin, then clean that all with strong mix of washing up liquid to completely remove anything that's in the bearing.

Completely dry it with compressed air or hairdryer, then you can recheck for any unwanted radial movement.

Now put clean engine oil into bearing and assess what it's like for smooth movement. 


Thats a good idea. But I think I'm going to be better safe than sorry and while its fully stripped replace parts that can be replaced. Some of the bearings in the crank case were pretty bad. I'll clean them up once they're off and if they seem ok see if anyone would like them.

Just spoke to John http://johnoldfield.co.uk/ and he has some in stock so I've ordered them. I'm already in deep so whats another £100   :'(
It generally takes alot to wear them, any unwanted grit makes them feel awful if not cleaned out.

Possibly made a cock up. Ive been cleaning all the transmission gears, shafts etc and it looked like the 5205HS bearings are really stuck on. So I left them on and cleaned the parts with degreaser and petrol. Before cleaning they sounded perfectly find and didn't feel rough but now they are a bit noisy and don't feel as smooth. I'm not sure if I cocked up or its because they have no oil on/in them anymore. I've sprayed a bit of bulldog BDX penetrating oil/lube on them and they seem a bit better. Would they be safe to use or should I fork out the almost £100 for 2 new 5205HS bearings? Does anyone know any sources other than yamiya?

Should they be hard to get off? Are they pressed on?

So just a drop of oil in the cylinders too?

I've decided to replace all the bearings as the gear selector bearing is pretty rough and the engine is stripped so I may as well.

I can't quite find a bearing for part 91022333018. In the parts manual its bearing, needle, 20mm. On PDF page 25 (https://www.dropbox.com/s/7pieydvznvy7nhp/CB350_F_F1%20Full.pdf?e=7&dl=0) its showing as a bearing inside a metal cylinder, does the bearing come out and a new one slide in?

I know its 20mm but don't know the other measurements. Has anyone found a replacement?

I took 2 measurements each time. Cleaned them in between and made sure it was the correct direction. I've ordered some blacks anyway as I need to do an order at DSS. Just need to wait for that and some more plastigauge. I'll take pictures next time too.

I think you are missreading the plastigauge chart or the micrometer ifvit was the gap you say you would probably feel play

I'll give it another go tomorrow. The measurements for the mains went fine, unless it was just one of those days today.

The Cs on the conrods are the weights, the only thing that matters about that is they are all the same.
Take the As from the webs and your conrod shells are A2, A2, A2, A2 which is Yellow.
Using Green or Brown should give you tight tolerance. Are you just tightening them or torquing them?

Im torquing to 14.75 lb ft.

It says 14.5 - 15.9. Should I bo going higher? I always go middle to lower end of the range.

Did you measure the crank Lukas, it may well be very worn.

If I'm reading the wear tolerance on the graph correctly, the wear is within the tolerance. All below 0.016mm