Heavy Twins

looking through the tech books and our suppliers  offers there is some confusion as to the threads of the bridge studs , they are either  cycle or BSF.    logic would say whitworth into the slider and cycle for the nuts ,  But no .  cycle I think.

Hello, just rebuilding a US import that was part complete, and noticed the frame is different from all of the other pictures I have looked at - only noticed this when it came to hanging the silencers! 

My 63 650  was orriginally a 6v bike but has been converted to 12v by the previous owner ,it has a frame and clamping angle to fix the battery . What is the battery to fit the space  ?

I would like to buy the above metioned Book and took note that `if you are a NOC member ` you can get it for £12 . When I go through to payment the price is £30 ! I`ve sent an email to merchandising but had no reply as yet.

Hello. First time poster and very new member here. Be gentle. 
 

Just planning to do some rebuilding of my recently purchased Norton Dominator 88 1959 and wonderd what `special` tools I would require to strip and rebuild the motor ? Thanks .

I am having problems fitting the primary chaincase cover onto my rebuilt '63 650SS. With the cover in place I do not have any threads on the centre footrest sleeve exposed to screw on the centre nut.

Hi chaps, working on my 1960 99 Slimline, does anyone know the socket size to fit the Norton/AMC clutch centre nut, or is a box spanner called for?

Hello all,

I have a slimline featherbed which is currently underway for build. 

I have an oddity in that it has no frame gusseting on the front two tubes.

Hello all.  I'm looking for a Vokes D-shape air cleaner for my 1956 Model 99.  Does anyone have a lead on those?  Or maybe a suggestion for making one?  I apologize if this topic is covered somewhere else.  I searched the NOC website for Vokes and