SOHC.co.uk Forums > CB500/550

twin disc conversion

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Ewan 500 K1:
worth putting some posts in "desperately seeking"  ... if you do go with two wheel spares my experience is that they will go with a lower "offer" on ebay than their stated starting price.
If getting a second hand caliper you probably  want to budget for new piston and seal ... as well as being wary of the bleed nipple issue oddjob points out. DSS has a compete caliper with piston seal, pads etc for £118

Johnwebley:
thanks for your helpful advice,Ewan and Oddjob

I have got the caliper and bracket,pipes and mastercylinder,(ex CB550) ,looks far better condition,and cheaper,

Oddjob,if you have a disc,please let me know,

we can work a deal , ;D

deciding on which forks to buy,the scruffy,or the bright blue ??

thanks

John

Ewan 500 K1:
I've got 3 sets of forks .. one set for cafe, one for the basket case and one spare. I was hoping that I'd go out an measure the bottom half sliders/cover hoping they'd all be the same ... they're not !

Set 1, off a 500K1 I think. this set only allows a single disc and have gaiters. The covers are 315mm long from centre of axle hole to top of cover
The covers have the following marking just above the axle seat:
Left cover,  on one side: 5 (and barely legible: 2726)   &   on the other side: HF  5
Right cover,   same markings as right hand side.

If we knew for certain which covers are interchangeable between which models we could maybe extend your choice and look at condition of covers only on the basis that this would be all you need if you can determine which are interchangeablle with your own ...by referring to the number markings on your own fork covers ?

Ewan 500 K1:
Set 2, this set allow for dual discs & has gaiters. Again the covers are 315mm long from centre of axle hole to top of cover. This set are marked "341" half way up the lower cover , so presumably off a 750 or 550. According to motogrid the covers are common to the 550 and 750, part numbers 51521-341-701 (left) and 51421-341-01 (right). None of the other sets are stamped half way up the covers.
The covers have the following marking just above the axle seat:
Left cover,  on one side: L1  5  + some very lightly stamped imperceptibe text  &   on the other side: HF  5 + some japanese characters
Right cover, on one side: 55Y 14R  &   on the other side 5  HF + some japanese characters
.... cover possibly interchageable with set 1, above .. (what I think is a 500K1 set) given that covers are same lenght and are all marked HF 5 ???

Ewan 500 K1:
Set 3 , pretty sure that these are off a 550K3. Have no gaiters and covers are 350mm long from centre of axle hole to top of cover. These are the ones on my cafe build
The covers have the following marking just above the axle seat:
Left cover,  on one side: L   4   (L party gone)   &   on the other side: 3    P
Right cover, on one side: R    5  &   on the other side:  4    Q

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