Tufnol Flange to Fit Amal TT/RN/Monobloc/Concnetric Carbs - 28mm Bore (i.e 350cc)

Tufnol spacer flange to fit between cylinder head and 'flange' type carburettors - i.e. Amal TT/RN, Monobloc and Concentric carbs.  This listing is for a 28mm bore spacer, 6mm wide.  

These 6mm thick tufnol type spacer flanges were a common fitment on many models fitted with Amal flange fitting carbs.  We keep two bore sizes in stock:

- 28mm bore - which equates to 1.102" in imperial size and very similar to the 1 3/32" (1.093") bore fitted to many Norton 350cc SOHC models (this Item listing 0844a)

- 30mm bore - which equates to 1.181" in imperial size and is somewhere between the 1 5/32" (1.156") bore and 1 3/16" (1.1875") large bore TT carbs, commonly fitted to 500cc Norton racing singles - for this see Item Listing 0844b.

These spacers are 2.00" between stud centres.

Note: We can also supply 22mm, 24mm, 26mm and 32mm bore spacers by special order, as well as 3mm thick tufnell spacers - email us at sales@racingvincent.co.uk to enquire.

If fitting to other racing carbs - please note, these spacers are approx 2.00" between stud centres.  Although not an expert on GP carbs - I think some of the larger bore Amal GP carbs were larger than this, therefore these spacers will not fit those carbs.

Note on Amal TT and RN carbs fitted to Norton SOHC models:  the flange spacers shown in these photographs are alongside an original Amal RN 'Longneck' carburettor - for comparison purposes only.  Norton SOHC models fitted with TT or RN carburettors were always supplied with the 'Long Neck' variety.  There was also a far more common 'short neck' version of both carb types, and this is often fitted to Norton SOHC models - as the long neck type are comparitively rare.  It is not uncommon for those that do not have a long neck available to fit a short neck type - but to get the original 'tuned length', it is advisable to fit an (approx) 1" thick spacer between carb and head.  I have done this myself on at least one Norton I have.  Sorry, but we cannot supply spacers of that diameter, but occasionally they can be found at autojumbles - or the long way is to buy a block of ally and machine/hacksaw yourself!