How not to B33!

[Dan_B33]

...is that gap standard?
See the picture below..

[Derek996]

I've got mine off just now, I'll have a look. Yours looks like the boss that attaches to the engine isn't centred.

[Ian C]

Firstly Dan, could you please re-size your pics to be around 300KB to make them easier to see when expanded? As you have stated previously, you have a modified inner primary chaincase, so are you altering it back to standard? Regarding the case around the crankcase boss, it should be more central but also the position for this is really determined by the footrest which goes through this case as you are aware and the holes should be slightly slotted as on mine from my M33. HTH

[Rog1]

Firstly Dan, could you please re-size your pics to be around 300KB to make them easier to see when expanded? HTH

Dan, it's not the file size that's the problem, it's how many pixels wide and high the photo is. So if you can reduce them to about 1,000 pixels wide they'll better fit on most phones and just about every computer screen.

[Dan_B33]

Hello,
Many thanks Rog and Ian.. I will take advice to shape my pictures as you described!
Thank for photo. I have worked a bit with the casing today. Some welding on the inside and grinding on the outside coral.
Some work still to be done but for sure it will be better than I received it .
I will post some pictures with final results later

[Dan_B33]

Big end and cylinder head just arrived.
I have not improved on cutting my pictures yet.... sorry

[Dan_B33]

Head.... combustion side. Valves are new as well as the guides...

[Ian C]

Pic size is getting better Dan!! A bit of advice if you don't already know.. Get some grinding paste and put a thin smear on the top of the barrel lip, then place the head onto the barrel in the correct postion it would be when engine assembled. Now gently spin the head one way then the other to make the joint between the head and barrel as good as possible. This may take some time, but doing this (as there was no official gasket from BSA for the Iron engines) will help with sealing. Obviously clean all the grinding paste away afterwards. HTH

[Dan_B33]

Thanks Ian,
I have seen Brian Alfonso doing that in one of his videos on YT.
I was surprised 😯. Kind of a lapping, right?

[Rog1]

Thanks Ian,
I have seen Brian Alfonso doing that in one of his videos on YT.
I was surprised 😯. Kind of a lapping, right?

I've done this lapping in on my M33. It takes a while but I know it's done now.

Also, your last photo was at a much easier to view size.

[Dan_B33]

Will do that as well.
Question: thread to undo drive sprocket is clockwise or anticlockwise? ( The one with gearbox)...Hints to undo while Gearbox is already out of frame?

[Derek996]

It is normal thread, anti-clock to loosen.

[Rog1]

Hints to undo while Gearbox is already out of frame?

I've never had my gearbox out* so I'm not sure, but can you bolt it back into the frame just to undo the nut? If not, can you make a jig out of some scrap steel that can be clamped in the vice or to the work bench with a G-clamp?

* Now I've said this, I bet I know what my next job will be!

[Dan_B33]

I have jus used chain....and standard workshop bench "wice".
Oil seal not present at all?
How come I'm not even surprised?

[Dan_B33]

If I'm not wrong that is : 65-3508, right?
I hope so since that is waiting already in Preston...at my brother's..