SOHC.co.uk Forums > CB500/550

550 F2 started!

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Laverdaroo:
pop it on the pile Ken please ::)

Oddjob:
Didn't come with that small hook bracket Roo but TBH it's not needed for the conversion anyway.

You have a read on how it's done? within your skill set?

Laverdaroo:
I'll have a proper read later as I have had a quick skim but in the middle of changing all the brakes and lines on the VFR......... What a vile job! They really couldnt have squeezed any more bike under those plastics, there is so little fiddle room it means the untwisting of lines to get them in the right spot and bent the right way is an utter pig!

#Be glad when Ive done this.

Wheel bearings in, discs done, pads in so all thr fronts done, just the proportioning valve to do, ABS pump to hoo up and the rear linked gubbins.


What a pig!

What's worse is that the bench is currently covered in CB750 motor and bags of CB550 bits meaning yet again, I'm grovelling about on the bloody floor!

I think I'm going to need a new hip ;D

Laverdaroo:
Ok,

so after gathering the gubbins required for looking at getting the shells identified and replaced, I've hit my first hurdle which it appears, all seem to have when undertaking this job.

Basically, there are no markings on my crank except the ones shown in the frst web which read 74.4.22. There is nothing else on there at all even after washing with two separarte batches of petrol, (just in case Id used the premix can)!

In this instance how do you measure up or identify the correct shells to order?

I have identified the cases as having the marks BBBBB


The crank measures from Number 1 to 4 with the last bearing being numbered 5...
1= 33.01mm
2= 32.99mm
3= 33.00mm
4= 33.01mm
5= 33.02mm

I have a number 2 printed on all the rods but again, nothing else has survived the last 40 odd years of no maintenance and I'm struggling a bit.

The crank measurements are pretty  consistant so looking at the chart would that mean that this is an all BROWN case?

I've got this right round my ears as I never measure anything this small, not that much call for micrometres in fishery management and not that familiar with the scales and the mental picture with which to work this outm its just not going in!
 When ever I've used my lathe it's always been to the nearest mm not to be measuring thou's and these micro scales so I'm a bit lost tbh.

Any help gratefully received as this is very much wearing a bit thin now.

Oddjob:
If the cases are all B's then you've really only ever had either greens or browns fitted. If the crank had a 1 it was a green, if it was a 2 it was a brown.

I'd just fit all browns, they are the slightly bigger shell and so long as you run it in correctly you'll be fine.

Same applies to the rods, only greens or browns for a No2 rod. Fit all browns again.

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