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Messages - K2-K6
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3166
« on: March 13, 2019, 07:09:23 PM »
Honda routinely use more or less bespoke bolts on many applications, you really have to be quite careful if you are to replace any.
Friend had an XR500 that had one (or two) 9mm bolts in the head!
You sometimes get odd things from very competent engineering designs though. Mercedes cars fitted with alloy wheels and steel spare used to need shorter wheel bolts to fit the spare. If you used the "alloy" bolts they would trepan a neat groove in the brake caliper from extending too far through the hub.
And Peugeot have used five sided bolts on their brake calipers to prevent tampering in the past.
Just sometimes a specific accuracy gives rise to a unseen fault that the designers didn't spot.
3167
« on: March 11, 2019, 08:23:14 PM »
FO I don't recognise. We got F2 and K7 as a pair for the same years, updated in USA to F3 and K8, so as you thought likely to be from the land of the free 
3170
« on: March 11, 2019, 10:13:28 AM »
That's a bit of a result, surprising what we keep in our garages.
3171
« on: March 10, 2019, 09:57:30 PM »
Didn't think it was the same as 750, and is retained by the screw retention ring on these.
3172
« on: March 10, 2019, 09:45:44 PM »
There are some services offered as many archives used microfilm etc to store documents.
Search for "microfiche to digital " for services. May be too commercial and involved for this scenario, plus copyright potentially.
As a rough any ready test, use masking tape to stick a sample to a window in daylight, then see what you can resolve with something like a phone camera at close range.
Ideally you need the smallest sized sensor (physical dimensions) with the highest megapixel count, combined with the closest focus ability.
If you can get it onto the chip at something aproaching life size, then the software will handle the viewing size. Plus being monochromatic, it should give decent sharpening to the details.
3173
« on: March 10, 2019, 09:13:48 AM »
Looks like good bike, hope he enjoys it. You're brave going to Croydon, even more so staying there!
3174
« on: March 08, 2019, 07:33:17 PM »
Looks a nice bike judging just by the photo, but that's a really chunky price for one of those.
3175
« on: March 08, 2019, 07:20:55 PM »
Looks superb, I really like that colour on this era of Honda.
3176
« on: March 08, 2019, 10:49:06 AM »
It's looking like it.
Try searching "dissolving polyester resin" as it discusses this sort of thing. The commonly suggested types you've already been through, it's very resistant to most.
Battery acid if you have any could be tried on sample.
Seems acetic used at 190dgrees may be possible, it all gets much more serious unless you routinely handle this stuff though.
What about a commercial acid dripper that do car body etc? As a line of enquiry.
3177
« on: March 08, 2019, 09:18:28 AM »
It maybe worth a look into Julie's engine rebuild thread to fully view the component parts and give yourself a broader picture in overview.
If you want to check if tensioner is moving on a non running engine, loosen the set/pinch bolt, put something like a small screwdriver against the spring rod, and get someone to turn the crank anticlockwise (looking at ignition side) slowly.
This'll put the camchain into tension on the "wrong" side and should push the rod towards your hand if the pivot etc are free.
If it moves, then turn the crank clockwise and it should go back away from you again. At this point you can lock the pinch bolt again as all the camchain slack will be placed next to the tensioner and should be adjusted and held by the tensioner.
3178
« on: March 06, 2019, 11:07:39 PM »
I trained in engineering, but wish I'd learnt more about economics so I could afford to spend more on engineering  Matthewmosse, now you've got me looking at myford add listings  although a nice Hardinge would be good, or a Colchester 2000. See what you've done
3179
« on: March 06, 2019, 09:44:55 PM »
Welcome to the forum Mike. I didn't have a CB125
3180
« on: March 06, 2019, 09:31:41 PM »
For Rob's benefit, Normandy motorcycles are a really old skool bike shop that have been there for years. Anyone near them has probably used them at one time or other. Located at Normandy nr Guildford (not France) and just round the corner from a crossroads named Christmas Pie, I kid you not
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