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A technical forum for all single cylinder Nortons

Upright gearbox kick start shaft wanted model 18

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BikeWould anyone have an old (upright gearbox kick start shaft) laying around, mine is pretty knackered. Reasonable price?  I have seen one for a 16H or a commando? on EBay from India...will this work on mine?   Thanks. 

beginning to hate this bike! I'm having trouble finding what parts work/don't work and manuals that tell "Jack" about what is what...sorry for the rant just want to ride it.  shipping: Nebraska 68037.

clicking and clacking

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hello, on my 1955 single cyl es2 engine i have a double click sound on turning the engine over slowly. with the plug out . when i look at the push rod adjusters through the inspection cover the clicking noise seems to correspond with the exhaust push rod. roughly in the position indicated on the cam lobe in the photo. i have had all the head and piston plus liner and little end done some time ago.

Reversing speedo drive

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Finally, I have my reversed speedo gearbox ready to fit.  This might (possibly) be of interest to someone.   A few small details include an internal thrust washer of phosphor bronze.  The new housing for the output shaft is also phosphor bronze, with an internal groove along its length to provide a path for grease lubricant.  The original had a steel dish pressed into the body, with a split pin in case it tried to escape when it was greased. Lots too many hours spent. I don't suppose anyone can confirm the thread for the grub screw in the gear?  I tried M3 and 6BA.  It might be 7BA (which is v

1947 Inter 30 type-approval / Betriebserlaubnis / Typenschein

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Hello everybody, an Inter 30 is the youngest member of my british bike stable in Austria. The motorcycle has  a V5C but is not an original Inter but a zombie, however very close to a 1947 Inter (and fast and beautiful). I have the ambition to road register it in Austria and a copy of a ca. 1947 Inter 30 type-approval / Betriebserlaubnis / Typenschein would be o great help. Any help very appreciated! Andreas

ES2 Cylinder Head Types

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Up until this weekend I was aware of 3 styles of cylinder head fitted to ES2, 19R/S, 50 during the fifties. Circa 1950 it was still the iron head. Around 1955, possibly a little earlier, there was the Al-fin head. This was the same shape as the iron head but with an iron skull combustion chamber and aluminium fins. It used the same rocker box as the iron head. From 1957 there was a new version of the aluminium head with cast-in pushrod tunnels. At the Stafford show I noticed a head for sale which at first glance appeared to be the Al-fin style.

Prewar Chronometric speedos

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I am (I hope) close to getting my Inter speedo but there's a delay sorting out the hub gear. But I found somewhere... Chronometrics are allegedly 1600 revs per mile unless they have a 4 digit number such as '1476' or '1500' or '1620' or something similar. Perhaps someone can confirm? Doing some calculations.

 


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