Light Twins

Anyone know the size of the roller bearing that supports the sleeve gear bearing in the later type of gearbox (Electra etc)?

Also what is the centre distance between between main and lay shaft in that gearbox?

Thanks,

John

Just as a post to encourage others to do something with their lightweight p

Dear all, 

My Navigator conrods have been bushed with bronze to compensate for worn gudgeon pins.  I've rebored the cylinders and fitting JP pistons.  The pins are too tight for the bushed rods so I have decided to re-bush (with aluminium) to suit the new pi

Hi all, it's been a while since I posted on this forum but my Navigator rebuild has stalled as I try to solve a gearbox layshaft bush / mainshaft bearing alignment problem which doesn't mean disassembling the engine again.....but I digress!   As i

What is the correct diameter for a headlamp for a jubilee. My headlamp shell measures 6” diameter, but the replacement reflectors on offer seem to be 61/2 or 7 inch. Any advice would be welcome. 

I have read somewhere that a modification was made to the return fitting in the oil tank during production of the lightweights, a restrictor to encourage oil up to the cylinder?  It carried over to the heavyweights, or the other way around?

Hi everyone can someone please tell me where to find the engine and frame numbers on my 1964 Norton navigator 

Thanks Mike 

Pair of complete heads on Ebay.

Ive recently removed the pistons from a 1960 engine. the only visable mark on the crown is a letter B. No markings to say they are a plus oversized. Anyone know what the letter B is. There is a very slight concave in the crown, is this normal.