Take a look here
https://partsbooks.britishonly.com/
You might find some info.

Have you looked here?
https://partsbooks.britishonly.com

With regards to spark plugs. I read recently that there are a lot of counterfeit NGK plugs around, especially on EBay.
The advice is to source plugs from a known a reputable place.

Hi,
I have just bought a litre of SAE20 fork oil from Westway Lubricants on EBay for £11.99 including postage.
Took 2 days to be delivered.
Regards
Andy

Hi Andy,
I have a B44 which appears to be a very similar setup to the C25.
I bought a kit from Paul Goff and although it was a pain to fit, I finally succeeded and it works fine.
The unit I have fitted also mounts off the rear engine bolt (after you’ve bought a longer stud) and the spigots point towards the oil connection manifold.
I messed about for ages until I decided to start with a blank canvas and removed both oil pipes.
Originally, the oil pipes on my machine were routed from the oil tank down between the plates of the rear engine bracket.
I could route them back that way but it was very tight and it made the connection onto the new filter virtually impossible.
I ended up routing the pipes down the gearbox side of the engine bracket.
As for connecting the pipes, I had to slightly bend the return spigot on the engine manifold down to get both connections on the new filter and the manifold to align better. Otherwise, there were too many kinks in the pipe.
As for the pipe supplied with the kit, I warmed it up with a hairdryer to soften it a bit before fitting.
I also fitted Dowty washers on the oil tank banjo connection, it doesn’t leak now.
I didn’t have to cut anything to fit the filter but there was a lot of cursing and fortunately no blood spilt.
Life would have been much easier with an hydraulic bike lifting bench as the garage floor was damned hard.
I hope the description of my struggle is helpful, don’t be put off the end result is well worth it.
If needed I could post a couple of photos for you.
Good luck
Andy

Hi Rupert,
Where did you get the crush washers from?
The ones I ordered were far too large on the outer diameter and wouldn’t even fit in the recess in the end of the fork tube, even though they were supposed to be the correct part number.
Regards
Andy

The forks on my Victor Special are the pinch bolt type and are fitted with damper tubes which are held in place with an Allan head bolt.
One leg has been leaking via the damper bolt so I removed it to see what the problem was.
The parts manual shows an aluminium washer under the bolt head which was missing. I ordered a couple of replacements, but they didn't fit.
The outer diameter was too large so they wouldn't fit in the recess in the bottom of the fork tube.
I found some nylon washers that would fit so I thought I would give them a try. When fitted I began to refit the front wheel but I couldn't get the wheel spindle past the damper bolt.
On closer inspection I could feel the head of the bolt very slightly proud of the recess in the bottom of the fork tube.
It turns out that there is insufficient depth in the recess to allow the fitting of any kind of washer no matter how thin.
As a stop gap measure I have applied a couple of wraps of PTFE tape under the head of the bolt and it appears to have worked so far.
I can only think of attempting to reduce the depth of the bolt head slightly to allow a soft washer to be fitted as a permanent fix.
Liquid thread sealant is no use as the fork tubes aren't threaded, the bolts screw into the ends of the damper tubes inside the fork tubes.
Has anyone else had a similar problem and how did you fix it?