Friday, January 7, 2011

1927 Model 25 Norton replica


This Norton was sold several years ago by Yesterdays; who knows more about it? The engine is an early unit, note that the cam chest is still split in two at the height of the oilpump. A striking feature is the large sprint-type petrol tank; originally it may have been fitted with a flat tank fitted in between the upper frame tubes. It may have been a racer, note the Sturmey Archer 'box without a kickstart.


Not that easy to explain is the left-hand crankcase half marked 79x120 which would identify the engine as a 588cc unit; did Norton ever make 588cc versions of the Model 25? Further, M25s usually had a framelug carrying the magneto support bracket that wraps fully around the frametube; this one looks like the Model 18 type to me.


A very nice bike that looks quite a bit like this 1926 TT racer; is it an original or was it pieced together from parts laying around; and does it matter?

Simon: "Almost certainly built up by Stefan Knittell several years ago.  The tanks are replica 1926 TT pannier tanks" 

Roger: "It has the wrong oil tank mounts, for the M25 they should be brazed rather than clamped to the downtube. Pat Driscoll's 1925 TT 588cc engine had the integral oil pump"

No comments:

Post a Comment