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<blockquote data-quote="Tom Gaynor" data-source="post: 8608" data-attributes="member: 4034"><p><strong>Rudges</strong></p><p></p><p>I like threads like this, they encourage me to get off my lazy arse and look at the books....in this case Brian Reynold's Don't Trudge It, Rudge It.</p><p></p><p>In 1929, and 1930 Rudge 250's had 2-valve JAP engines (in 1930, both sv and ohv).</p><p>In 1931, 1932, 1933 and 1934 they had fully radial Rudge 4-valve engines. Rudge also made 175cc 4-valve engines, which were sold to continental manufacturers. There were two 1934 models, the "standard" and the "sports model". </p><p>In 1935 they had both 2-valve (the "Tourist" with upswept pipes) and 4-valve (the "Sports"), both Rudge engines. The 2-valve might have been developed with an MoD contract in mind. Four open radial valves, operated by six open rockers might have challenged any mechanic, far less an Army one. </p><p>In 1936, the 2-valve was the "Rapid", the 4-valve was the "Sports". This was the last 4-valve 250.</p><p>In 1937 only the Rapid was offered, but with upswept pipes.</p><p>In 1938, and by implication 1939, the Rapid had upswept pipes, and the Sport (a tuned Rapid) didn't. </p><p></p><p>They started going bust about 1934, and adopted "a policy of continuous improvement". I've always taken this to mean parts-bin specials, so they'd build bikes with four valves (or whatever) until the bits ran out. I've found this true particularly of 1935 and 1936 bikes. Vincents are EASY by comparison.</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 8608, member: 4034"] [b]Rudges[/b] I like threads like this, they encourage me to get off my lazy arse and look at the books....in this case Brian Reynold's Don't Trudge It, Rudge It. In 1929, and 1930 Rudge 250's had 2-valve JAP engines (in 1930, both sv and ohv). In 1931, 1932, 1933 and 1934 they had fully radial Rudge 4-valve engines. Rudge also made 175cc 4-valve engines, which were sold to continental manufacturers. There were two 1934 models, the "standard" and the "sports model". In 1935 they had both 2-valve (the "Tourist" with upswept pipes) and 4-valve (the "Sports"), both Rudge engines. The 2-valve might have been developed with an MoD contract in mind. Four open radial valves, operated by six open rockers might have challenged any mechanic, far less an Army one. In 1936, the 2-valve was the "Rapid", the 4-valve was the "Sports". This was the last 4-valve 250. In 1937 only the Rapid was offered, but with upswept pipes. In 1938, and by implication 1939, the Rapid had upswept pipes, and the Sport (a tuned Rapid) didn't. They started going bust about 1934, and adopted "a policy of continuous improvement". I've always taken this to mean parts-bin specials, so they'd build bikes with four valves (or whatever) until the bits ran out. I've found this true particularly of 1935 and 1936 bikes. Vincents are EASY by comparison. [/QUOTE]
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