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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Gas/petrol tank underside recess position (not the UFM recess) and shape
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<blockquote data-quote="Simon Dinsdale" data-source="post: 95781" data-attributes="member: 58"><p>You are correct Graham. There is no such thing as a series B fuel tank the way most owners describe them. The large cutaway came in sometime towards the end of 1950. Its safe to say no series B machine was fitted with the larger cut out, but any series C made in 1949 and most of 1950 would have probably been fitted with a small cut out tank.</p><p></p><p>A lot of modifications / improvements in 1949 & 1950 had nothing to do with the different series.</p><p></p><p>Here is another. The early gear lever mounted off the footrest hanger and with the external linkage was used well into 1950. Again it was used on early series C's and so strictly speaking its not a series B gear lever. Your Rapide in question would have had such a gear lever. Aparently there is an advert that Paul Richardson as service manager placed in one of the motorcycling magazines around early 1951 announcing the new & improved one piece gear lever and other improvements. I have never seen this advert so cannot confirm the date.</p><p></p><p>I have previously explained the RFM changes. Again nothing to do with series B or series C. There was an 18 month overlap in 1949 & 1950 where the factory was making both series B & C side by side. During that 18 months a lot of slight design changes were introduced on both the B & C series at the same time. The factory was always short of money so they were not going to produce two different fuel tanks or RFM's at the same time.</p><p></p><p>Simon</p></blockquote><p></p>
[QUOTE="Simon Dinsdale, post: 95781, member: 58"] You are correct Graham. There is no such thing as a series B fuel tank the way most owners describe them. The large cutaway came in sometime towards the end of 1950. Its safe to say no series B machine was fitted with the larger cut out, but any series C made in 1949 and most of 1950 would have probably been fitted with a small cut out tank. A lot of modifications / improvements in 1949 & 1950 had nothing to do with the different series. Here is another. The early gear lever mounted off the footrest hanger and with the external linkage was used well into 1950. Again it was used on early series C's and so strictly speaking its not a series B gear lever. Your Rapide in question would have had such a gear lever. Aparently there is an advert that Paul Richardson as service manager placed in one of the motorcycling magazines around early 1951 announcing the new & improved one piece gear lever and other improvements. I have never seen this advert so cannot confirm the date. I have previously explained the RFM changes. Again nothing to do with series B or series C. There was an 18 month overlap in 1949 & 1950 where the factory was making both series B & C side by side. During that 18 months a lot of slight design changes were introduced on both the B & C series at the same time. The factory was always short of money so they were not going to produce two different fuel tanks or RFM's at the same time. Simon [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Gas/petrol tank underside recess position (not the UFM recess) and shape
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