500 K cafe racer conversion - build thread

[Ewan 500 K1]

and the rear wheel build photos....

1. Wheel in original state
2. Polished hub, new spokes (had these kicking around for the past 14 years, waiting to get done ) and new DID chrome rim
3. "A" type spokes laced up
4. The truing jig .... swinging arm clamped in a vice with dial guage stuck onto swinging arm
5. The finished wheel, trued to 0.15mm horizontal & vertical

[Ewan 500 K1]

Next up is getting the dual disks set up. Any opinions out there on the best place to buy cobalt drills to drill the discs with and a supplier of longer stainless disc bolts (120mm ?)
(laterz, for my pain and agony in setting up my dual discs see my seperate thread at http://www.sohc.co.uk/index.php?topic=5571.msg27566;topicseen#new )

[mickwinf]

brake plate looks like a later 550 k3 type

[Ewan 500 K1]

brake plate looks like a later 550 k3 type

that could be it .. I know my 500 has 550 front forks on, so every chance the back wheel is also 550. Only 550k3 parts diagram that I can find only shows the inner face of the brake plate, so still not 100% sure ...... Mick, that master cylinder and £20 is is the post

[kendo57]

Oil seals all look similar in pictures but it could be the one that fits inside the plate that bolts onto
the rear sprocket.

[mickwinf]

Ewan i have parts books for all the 500 and 550s and none show a steel spacer like that. If it is a 550k3 rear wheel maybe it needed a special spacer to fit to the 500 swingarm? i will parcel up the bits for you tomorrow, PM your address, regards Mick

[MIKE550/4]

this might clear up the back plate issue, my k3

[Ewan 500 K1]

That's the one MIke , cheers.

[MIKE550/4]

as far as i can see this is part no for my plate  41211-323-000

if you go to http://www.motogrid.com and search buy it  ... it only comes up with 500 and 550

although this guy is selling this, slight diffference with the spline shaft ?

http://www.ebay.co.uk/itm/Honda-CB750-1970-K0-SOHC-Rear-Brake-Plate-/330639712147?pt=UK_Motorcycle_Parts&hash=item4cfba99f93

sure one of other guys will confirm

[Ewan 500 K1]

as far as i can see this is part no for my plate  41211-323-000

if you go to http://www.motogrid.com and search buy it  ... it only comes up with 500 and 550

although this guy is selling this, slight diffference with the spline shaft ?

http://www.ebay.co.uk/itm/Honda-CB750-1970-K0-SOHC-Rear-Brake-Plate-/330639712147?pt=UK_Motorcycle_Parts&hash=item4cfba99f93

sure one of other guys will confirm

Mike, the part number you mention is the cover plate for the rear sprocket, not the the rear brake plate   
The difference between the 750K0 one one ebay and your (and my) K3 one is that the 750K0 one seems to be missing the wee wear indicator stub above the spline. .... possibly this was just a wee addition and otherwise both the brake plate on your K3 and the K0 are the same ?

[Ewan 500 K1]

as far as i can see this is part no for my plate  41211-323-000

if you go to http://www.motogrid.com and search buy it  ... it only comes up with 500 and 550

although this guy is selling this, slight diffference with the spline shaft ?

http://www.ebay.co.uk/itm/Honda-CB750-1970-K0-SOHC-Rear-Brake-Plate-/330639712147?pt=UK_Motorcycle_Parts&hash=item4cfba99f93

sure one of other guys will confirm

Mike, the part number you mention is the cover plate for the rear sprocket, not the the rear brake plate   
The difference between the 750K0 one one ebay and your (and my) K3 one is that the 750K0 one seems to be missing the wee wear indicator stub above the spline. .... possibly this was just a wee addition and otherwise both the brake plate on your K3 and the K0 are the same ?

Had a gander at that site (which is very useful   ) .... the brake plate fits all of the follwoing:

CB550F A (77) MOTORCYCLE, JPN, VIN# CB550F-2100001 TO CB550F-2114871

CB550K A (77) MOTORCYCLE, JPN, VIN# CB550K-2000007 TO CB550K-2015308

CB550K A (78) MOTORCYCLE, JPN, VIN# CB550K-2100001 TO CB550K-2122082

CB750A A (77) MOTORCYCLE, JPN, VIN# CB750A-7100001 TO CB750A-7110560

CB750K A (77) MOTORCYCLE, JPN, VIN# CB750-2700009 TO CB750-2729534

CB750K A (78) MOTORCYCLE, JPN, VIN# CB750-2800001

part number is :  43100-393-781

[MIKE550/4]

bryan j has mentioned this site

[matthewmosse]

Be carefull of using stainless for high stress or mission critiacl areas like brakes, it's not nessisarily that strong and I'd be after high tensile steel  or getting bolts from someone who sells parts specifically for this job. Mot stainless is A2 grade and not up to the job for disk holding. Phill Denton engineering are the only firm I can think of who I'd go to for shiny bolts for this job. That said I don't do shiny

[Ewan 500 K1]

Be carefull of using stainless for high stress or mission critiacl areas like brakes, it's not nessisarily that strong and I'd be after high tensile steel  or getting bolts from someone who sells parts specifically for this job. Mot stainless is A2 grade and not up to the job for disk holding. Phill Denton engineering are the only firm I can think of who I'd go to for shiny bolts for this job. That said I don't do shiny

cheers for the heads up on that one ... I had it the the back of my mind that normal stainless bolts werent the ones for the job. Tried Phil D a while ago I think , but they dont have the neccsary bolt sizes as stock, would need to do a one off.  Anyway, got a hold off 6 GL1000 disc bolts (112mm long)  from DSS the other day... well  pricey at £22 inc vat and delivery. Hoping they'll do the job. I was going to order new nuts to fit as well, but fell over at the price of those --- £3.25 each +VAT & delivery

[Ewan 500 K1]

Be carefull of using stainless for high stress or mission critiacl areas like brakes, it's not nessisarily that strong and I'd be after high tensile steel  or getting bolts from someone who sells parts specifically for this job. Mot stainless is A2 grade and not up to the job for disk holding. Phill Denton engineering are the only firm I can think of who I'd go to for shiny bolts for this job. That said I don't do shiny

cheers for the heads up on that one ... I had it the the back of my mind that normal stainless bolts werent the ones for the job. Tried Phil D a while ago I think , but they dont have the neccsary bolt sizes as stock, would need to do a one off.  Anyway, got a hold off 6 GL1000 disc bolts (112mm long)  from DSS the other day... well  pricey at £22 inc vat and delivery. Hoping they'll do the job. I was going to order new nuts to fit as well, but fell over at the price of those --- £3.25 each +VAT & delivery

just opened my DSS parcel, they only had 4 GL1000 disc bolts in stock.... anyone could a couple (112mm long ), part no. 90122-371-000 ?