Crankshaft shimming

[Greybeard]

Yes, eliminates the possibility of the inner race moving on the shaft. I know if it's tight on the shaft it shouldn't but!
Just to be on the safe side I like to have it as though the motor is running.
Cheers

Ah, OK, I get it!

[BSA500]

So do I now 

[BSA500]

So did more stripping down. Endfloat is 5 thou not massive but enough for me. Biggest issue and source of noise/vibration is the really floppy timing side big end. When I rebuilt it there was some play but I was impatient to get riding. Big mistake it seems

[BSA500]

OK anyone who has seen the video sort of pulls a face similar to 'how didn't that go bang'. I have contacted a engineer who is going to check then most probably grind the journals(with the correct radius everyone). If we are talking about price £27.50 per side.
 I can then reshim rocker arm play and clean up bits ready. Also clean and check the anti syphon valve ball etc.

[BSA500]

The engineer now has the crank for a grind and it looks like I have to make the grub screw for the anti syphon valve(67-1401) as nobody stocks them. In the wet sumping thread you will see I had left this part out and had been wet sumping for some strange reason

[Greybeard]

...looks like I have to make the grub screw for the anti syphon valve(67-1401) as nobody stocks them. In the wet sumping thread you will see I had left this part out and had been wet sumping for some strange reason

It's the same Whitworth thread as the cylinder block studs.

[BSA500]

Yep but I had better use a bolt as I would have to but one of those as well

[orabanda]

I modify the retaining screw for the anti-sumping ball valve. From memory, the thread is 3/8 BSW.

To slightly increase the  spring loading on the ball I make the screw a little bit longer; think it was about 0.080". I also machine a little recess in the centre (create a shoulder) which the spring locates in centralises it under the ball).

Richard

[muskrat]

Hay GB, you been using the Delorean again. The quote in your last post says 1974!!!!!
Cheers

[Greybeard]

Hay GB, you been using the Delorean again. The quote in your last post says 1974!!!!!
Cheers

I guess I cocked up!

[duTch]

 

Hay GB, you been using the Delorean again. The quote in your last post says 1974!!!!!  Cheers   

 Saw that and thought my eyes had totally cocked out.. . Remember,remember the 4th (or 5th) of November......

 

Quote from: BSA500 on November 05, 1974, 04:00:44

    ...looks like I have to make the grub screw for the anti syphon valve(67-1401) as nobody stocks them. In the wet sumping thread you will see I had left this part out and had been wet sumping for some strange reason

It's the same Whitworth thread as the cylinder block studs.

 I bought a spare plug & A65 spring from SRM, but was a couple of years ago....measured it at 16 T.P.I (3/8 ww), x 0.1735 long which is a nothing measurement between 11/64" & 3/16"

 **...sorry 'Off Topic'.... I've had an issue with my now 4yr old Macbook  where it saves files/pics on the 12/12 of whichever year I'm in- been onto Apple and spent a few hours on the phone doing 'screen-sharing' to sort it but no go. Is not a major issue until I had to prove I tried to pay my rego one day and couldn't get a connection-several times .....
 Normal Programming will now resume......

 Pics;
 

[BSA500]

Crank grind done. One journal was 3 thou under the other. Could explain a lot

[BSA500]

Why is it whenever I need big end shells that size has become the rarest of the rare size. I need -30 I know Draganfly have them but they would at £72 plus post. Also SRM do but again £54 plus post.

[RichardL]

More and more we are in the bullet-biting business when it comes to paying for the parts we need. Oddly, or unfortunately, or naturally, the prices go up because of our own friends and members here. I have pondered the question as to if parts scarcity is, in part, due to the forum making it much easier and welcoming to restore our marques. We HAVE grown a bit since 2006.

Richard L.

[BSA500]

I know what you mean,but the prices for these are quite reasonable from other trusted suppliers at around £30 but no stock. I had exactly the same problem years ago when I needed -20. Alot of the new shells are unbranded as well so some risk there.