Honda-SOHC

No nipple Trigger so I'm guessing I've got an old style swingarm

ha ha the boss was out at the time 

Managed to find all the codes that I think I need to work out what bearings I’m going to have to pop in.  The main crank code was a right pig to find and then read.  You needed just the right light and angle to see all the etched letters and numbers but after a few minutes of juggling crank and torch I got there.

So the numbers that came back are BBBAA from the K1 cases, J ACCAA P L4444 from the KO crank itself.  The rods themselves were all 2F.

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Now from the table in the book I have here I’m looking at all green bearings for the rods themselves – if they are all in spec.  The original green bearings themselves all looked in good nick when I split the cases so may be able to reuse possibly once I've checked clearances

Trying to work out the rest it looks like I’m going to need 10 x green (possibly only 2 if I can reuse the original rod bearings), 4 x brown and 4 x yellow but I’m going to go over my 5 min calculations to make sure it’s all correct before attacking the thing with Plastiguage.  With the play in rod 1 I think this might need a different bearing itself but the plastiguage will help I guess

I’m kind of thinking of getting one set of green, brown and yellow bearings for now so I have test each point and have a new size bearing if one or more are slightly out of one specific size, if that makes sense.  I can then double check everything before ordering my final bearings.

Cheers Guys

With the cases now split I managed to have a look at the pistons, rods and crankshaft itself.  They all seem to be in decent nick although the number 1 rod seemed to have a fair bit of side to side play. I have no idea if this is in tolerance but as I’m going to have to get the oil clearances checked for new bearings I’ll soon work all that out.  As I’m marrying the K0 internals to the K1 cases I’m probably looking at all new bearings anyway.  The main bearings were all green in the K0 and looked in decent condition but I have no idea if they can be used again or transferred over to a new set of cases – I’m assuming they can’t?  The transmission looked to also be in good nick as well so feeling optimistic that the engine is a good un.

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While I had the crankshaft out I made notes of all the etched numbers for working out which bearings I'm going to need.

I’ve also had a blast at the carbs today and I have to say I’m pleased with how they have turned out having been attacked with degreaser and a toothbrush.  I should really get them soda blasted or bead blasted or something but it’s good getting your hands dirty and cleaning something up yourself, especially something that was as cruddy as these carbs.

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I wouldn’t eat my dinner off them just yet but it’s a start

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Good luck with the project, if you have no luck with the top yoke I have a cast one that just needs one face machining.

Cheers Mark (any pics?)

Sounds easy Trigger

While I've got you actually you mentioned in a post I was reading the other day about prepping cases for paint.  As mine are split at the moment, both the K0 and K1, I wanted to possibly get them sent off at some point to have them prepped.  I was thinking initially that all they would need is a good clean and then possibly bead or soda blasted but your post went into a load of detail about acid dips and the like?

Sacrificed the one on the left

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to hopefully help me get to something like this

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Cheers all for the replies

I'm going to try and explore the mirrored bracket option as I'm a bit of symmetry geek.  if it doesn't work out then I can always try the later caliper arms/supports and spacers.