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Messages - Dolomite_

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1
CB350/400 / Re: Engine rebuild Parts list
« on: March 26, 2024, 09:40:52 AM »
Would it be worth getting a smaller gauge?


Where did you get it from? I can only find big boxes of it that are £35+

2
CB350/400 / Re: Engine rebuild Parts list
« on: March 26, 2024, 09:11:17 AM »
Someone on this thread said green so I got 0.007″ to 0.020″ (0.175mm – 0.500mm).

I didn't realize there was a metric scale on the other side until I measured 4 of the bearings, I'll have another look. Can I just match the same 7 reading location on the metric scale?

3
CB350/400 / Re: Engine rebuild Parts list
« on: March 25, 2024, 07:02:58 PM »
Update.

My brown and green bearing sets arrived from impex. Took a while to get them on their end but only took 5 days to arrive from Japan which is crazy.

Pictures of plastigauge measurements here: https://imgur.com/a/WOXySvp

Ive noted which one is brown. They are all 7 thousandths or less, except one which I will measure again.

From looking back at the chart could I change the greens to browns or would that be too tight of a tolerance?

4
CB350/400 / Re: Engine rebuild Parts list
« on: March 12, 2024, 07:13:05 PM »
Out of interest does number 2 mains journal look visually different to the others in any way?

Gave it another clean today and remeasured it, it measured similar to the others, I think it was just still dirty. All the main journals look pretty much the same.

5
CB350/400 / Re: Engine rebuild Parts list
« on: March 11, 2024, 07:42:39 PM »
When you say the clearance is 0.01124, do you mean the crank measured 31.98876?

Yeah, the figures I gave are just the clearance, so 32 - whatever the measurement was.

The 2nd measurement was a bit odd but the measurements I got from measuring it in a few places was 31.98368mm 3 times.

The way I read the chart was like this. First code is B so the crankcase allowance row B, then the clearance is 0.01124mm or 0.011mm so its the - 0.010 to 0.020 column so BROWN.

Actually reading it out loud and typing it, it should be 1 BROWN 4 GREEN.

I'll order 1 set of green and 1 set of brown and measure with plastigauge.

6
CB350/400 / Re: Engine rebuild Parts list
« on: March 11, 2024, 02:15:21 PM »
My initial main clearance for the crankshaft measurements is below. Its the result of 32 - the measurement.

stator end on the left

0.01124mm  0.01632mm   0.01378mm  0.01378mm   0.01378mm

Crankcase codes are B A A A A

If im reading the chart correctly I would need 1 green 4 brown. Does that sound correct?

Rechecked it and it should be 1 BROWN and 4 GREEN. I dont think i could do all 5 brown, it would be too little clearance for the A marked ones.

7
CB350/400 / Re: Engine rebuild Parts list
« on: March 07, 2024, 01:05:20 PM »
Ahh ok got it now. I didnt realise the graph was in millimeters.

8
CB350/400 / Re: Engine rebuild Parts list
« on: March 07, 2024, 12:23:03 PM »
Where is 45 coming from?

I understand the + and - I just can't figure out + and - from what figure.

9
CB350/400 / Re: Engine rebuild Parts list
« on: March 07, 2024, 08:05:18 AM »
Im assuming its the 35 and 32 on the graph. What measurement is that?

I've never really used thousandths of an inch before.

https://imgur.com/a/RvqynPu

10
CB350/400 / Re: Engine rebuild Parts list
« on: March 06, 2024, 09:39:19 PM »
What is the base measurement for the mains and connecting rod sizes?

The haynes manual says +x number but plus from what base measurement?

11
CB350/400 / Re: Engine rebuild Parts list
« on: March 06, 2024, 04:11:54 PM »
Back again. So the new crankshaft arrived and it does look a lot better than the old one.

https://imgur.com/a/IFNfRnb pictures of the codes on the webs

It looks like the codes are 1 1A 1A 1A 1A the crankcase codes are BAAAA.

From looking at my haynes manual I get yellow bearings.

Is that right or wrong?

12
CB350/400 / Re: Engine rebuild Parts list
« on: March 02, 2024, 08:37:34 PM »
My plan is when the new crankshaft arrives, figure out the shells needed from the codes and order 1 set, then try that set with plastigauge and see what it shows. I'll then probably ask for some advice here.

13
CB350/400 / Re: Engine rebuild Parts list
« on: March 02, 2024, 10:29:49 AM »
Yeah, I've got the Haynes manual and I've also been using the shop manual pfd. I'll try the petrol trick with the new crank. When it arrives. But good to know its hopefully just a case of getting all the codes and working it out.

14
CB350/400 / Re: Engine rebuild Parts list
« on: March 02, 2024, 09:59:50 AM »
Ive tried to figure it out and looked through other posts. But how do you work out the shells needed from the crankcase codes?

Would these be the ones to use for the new crankshaft?

15
CB350/400 / Re: Engine rebuild Parts list
« on: March 01, 2024, 10:51:41 PM »
Both those look same to me and would save you spending roughly £80 on big end shells.
Plastigauge is accurat when used correctly but you need a main bearing pin size to start from.
What are the letter codes from the rear of your crankcases?

The crankcase code is BAAAA.

I'm near Preston.

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