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Discussion Starter · #1 ·
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OK I had to take apart the engine to connect a problem and found out it had one spinned bearing and one bend rod. After searching I see the bearings are color coded what is the difference. I bought rods pistons and a crankshaft now I trying to figure out what bearing to use. So if someone could explain the color codes I'm guessing oversized. I want a stock size if that helps
 

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All the bearings are color coded in Honda engines. There is a mark (letters and numbers) on the crank and on the block for the main bearings and on the crank and the rod for the rod bearings. You need a manual to translate the marks.
 

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Discussion Starter · #3 ·
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Any idea where at on the crank I see M 1 and Z are these them. Thanks
 

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Is the crank machined or brand new? If it has been turned, The bearings might be undersized to match the new machined size.

When you are installing your rod & crank bearings, test the size by using plastiguage on them. That way there will be no doubt as to the tolerances.

When I put bearings in anything, I always use pre lube like engine honey or whatever is available. Good old engine oil works too, it just migrates a little too much for me.
 

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Way back, my dad and I used STP as a prelube. That was 40+ years ago. Anything that is thick and syrupy...
 

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The main bearing codes are on the end of the block by #1 cylinder and are I,II or III. on the crank near the main journal 1,2 or 3. For the rods, on the crank near the rod journal A,B or C and on the rod 1,2 or 3.
 

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Discussion Starter · #7 ·
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Thanks folks, I picked up the crank rods and piston today, I was suprize the bearing were still on the rods they were green. By the way it's from a 78 does anyone see a problem with this since I have a 77. I'm going to remove the kick starter part and put it on the new to me crank and see how it fits
 

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Discussion Starter · #8 ·
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OK got another question, I was reading the manual and it says on cylinder 1 and 3 the connecting rod bearing do not have a oil hole and cylinder 2 and 4 bearing have the oil hole.

Is that right,
 

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The crank changed the timing index marks in 78. Also there was a change in the oiling ports for the mains but I do not know when that happened. (The more I think about the oil port changes the more I think it may have been during the 1100 run????)
 

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Thanks for the info Whiskerfish, I measured the timing mark and they appear to be the same except one goes T2F other is TF2
 

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The initial Ignition Timing point changed from 5 BTDC in the 75-77 models to 10 degrees BTDC on the 78/79 models.
 
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