Crankshaft regrinding

[shaunstaples]

I bought some Flexoid from the Newark Jumble a while back, but it wasnt cheap, I will keep looking on that.

Got to say on the Engineering, been looked after and nothing was too much trouble. I could leave it with him, so as not to put too much pressure on him and he rang me to collect, it's not far for me and 2mins from viaduct/Meadowhall so easy access, just what was needed to claw some time back!

With the oil it would be nice to maintain reasonable pressure on say 15w40 but not holding too much hope. Ive played safe with the 20w50 and the cheapest Carplan at £20 delivered, best result will be high pressure with some in reserve so I dare try 15w40.

Easiest way to compare would be compare 2 bikes oil between changes at set milages, maybe just colour on a white background I was thinking, one with bypass and one without, then the alarm went off......

[shaunstaples]

Laser cutting timing cover gasket, in thickest paper I’ve got. Also doing one for behind chaincase and thick ones for manifold/ carb

[shaunstaples]

A couple of pictures of them done, it takes about 10 mins to cut on full power at 10mm/sec

Thick Gaskets.jpg

Timing cover gasket.jpg

[Groily]

Nice use of the paper!
A lot better than a sheet of glass, modelling knives, scissors, hole punches and pencils (and occasional foul-ups, usually JUST when you're nearly there)!!
Might be well worth doing a run of them as you suggested. I'd certainly be good for a few. A great help for those of us who don't want to rely on old mating surfaces being as flat as they need to be to stay oiltight without.

[shaunstaples]

Yes I could do that, maybe winter thing though. It's usable now I think just a few tweaks to push the outside edge out, although we drew it from the timing cover image, so the top face might be lined up better on the cover and at 7 - 8 oclock a little baggy but going to try it.
I did it from the timing cover side so it wouldn't be seen as much. Ive pulled the dynamo corner out a little but this might be seen now?
Its just getting the paper cheap enough, I've seen it between £10 and about £4, and its a bit wasteful without making a jig to cut blanks and line up in the laser, probably with some thinking could make better use of the sheet.

What thickness gasket paper would be best?

Back in the day Cornflake packets were the best (happy days), I have to say Amazon delivery card envelopes make great templates, a bit like a sponge though, but might work if they were soaked in something as a barrier (PVA? ). I love it when they send you something tiny in an A3 one, makes my day!

My laser is homemade from 2x3d printer frames side by side to get enough size for a3 (chaincase) with a chinese diode laser head. Me and my lad Oliver built two (his slightliy bigger) on the same theme, mine is running off 12v his 24v and his is quite a bit more powerful, engraving its way into the mild steel bed. Ive done my bed out of pop rivets like a bed of nails on the chisel end of the stalk, his is a bit better.....

[Groily]

You're an inventive bloke Shaun - but we knew that!
My DIY timing case gaskets have variously been 15 thou/0.4mm - bit flimsy and fragile to play with - and 25 thou / 0.6mm-ish for a better survival rate!
New 'in their packet' Norton Dommie ones I have on the shelf are 30 thou / 0.75mm. Probably a reasonable guide, Andover Norton etc know what they are doing.
Some say gaskets should be no thicker than they need to be and that they don't need to be thick - but I've used what I've had the Flexoid to make.
Chaincase ones almost certainly need to be thicker than these ones though -I'm out of whatever I had been using for them now.
But we all decanted cornflakes into something else to snaffle the packaging back in the day, I'm sure.

[shaunstaples]

The one I cut is 0.0255 - 0.647mm so on the right track, I'll see how it bolts up and go from there. Ive got to helecoil the screw in the end near the magneto as it had a rogue longer screw to reach the last bit of remaining thread.

[limeyrob]

I like that a lot. There's a lot of time invested in what you have done. Think about what you want to do with the digital files. These could be made available along with any others club members produce as a resource for members to run on their own equipment or take to the local printers / engravers.

[shaunstaples]

Like if the club wants them, there could be a download space for them? I’ve got a lot out of the forum so would be good to give a bit back. It’s not really worth cutting them yourself when they are available, but like this for the timing case you can’t get it. I’m retired so not looking for a job just enjoying the little bit of spare time, never had any when I was working and kids were young.

[limeyrob]

I can't speak for the club, but yes some form of download space is what i had in mind. I'm sure there will be other files and as more people get 3D printers there will be unobtainable parts that may be suitable for home printing. Most of out bikes are made of metal (thank goodness) but you never know.