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Everything Else (Not Vincent Related)
1938 Rudge Race Bike
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<blockquote data-quote="Nulli Secundus" data-source="post: 81918" data-attributes="member: 560"><p>Thank you for the replies and comments so far.</p><p></p><p>I spent a lot of time ensuring the wheels were aligned when I fitted a new rear tyre, but I will recheck this. The wheel bearings and head bearings all feel OK, but again I will recheck. Roy Robertson advised me to balance the front wheel. I will do this and check for roundness at the same time.</p><p></p><p>Tony said that there is a bump on Gerrards, that if you are pushing hard will set off a wobble. I do not think I found the bump, luckily, but I was experiencing the wobble even on early laps at the Test Day.</p><p></p><p>After practice on the race day Mervyn Stratford, who races an incredibly fast 250cc fully radial Rudge, adjusted my friction damper to make the steering movement much heavier. However, with misplaced confidence I probably went a little faster and experienced an even bigger wobble. I then wound the damper on some more.</p><p></p><p>I went a little slower in the next race, which was for Novice riders. I think this was due to the fact I was the only really old bike that made the grid in a field that was far more modern. They also set us of in pairs and I was in the second to last group with no time correction. I was set off 50 seconds behind the first group, which is most of the lap. I did out gun the XR500 Yamaha next to me to Gerrards, but he passed me there. I then resigned myself to just getting a signature on my licence.</p><p></p><p>I did go faster in my last race and set my best lap time of the day, however my clutch was beginning to slip (now rebuilt) which meant missing two more races.</p><p></p><p>I should add most of the other girder fork machines that I saw at Gerrards were wobbling. Inter Norton, Velos and Rudge. I did not see Mervyn Stratford's 250cc wobble though.</p><p></p><p>The BHR machine specifications seem to fail to mention hydraulic steering dampers.</p><p></p><p>The engine/gearbox plates on my bike are alloy and to me they look too thin, because they are the same thickness as steel ones. I would think they need to be at least as half as thick again. Perhaps this, combined with stickier tyres is causing, or part of, the problem.</p></blockquote><p></p>
[QUOTE="Nulli Secundus, post: 81918, member: 560"] Thank you for the replies and comments so far. I spent a lot of time ensuring the wheels were aligned when I fitted a new rear tyre, but I will recheck this. The wheel bearings and head bearings all feel OK, but again I will recheck. Roy Robertson advised me to balance the front wheel. I will do this and check for roundness at the same time. Tony said that there is a bump on Gerrards, that if you are pushing hard will set off a wobble. I do not think I found the bump, luckily, but I was experiencing the wobble even on early laps at the Test Day. After practice on the race day Mervyn Stratford, who races an incredibly fast 250cc fully radial Rudge, adjusted my friction damper to make the steering movement much heavier. However, with misplaced confidence I probably went a little faster and experienced an even bigger wobble. I then wound the damper on some more. I went a little slower in the next race, which was for Novice riders. I think this was due to the fact I was the only really old bike that made the grid in a field that was far more modern. They also set us of in pairs and I was in the second to last group with no time correction. I was set off 50 seconds behind the first group, which is most of the lap. I did out gun the XR500 Yamaha next to me to Gerrards, but he passed me there. I then resigned myself to just getting a signature on my licence. I did go faster in my last race and set my best lap time of the day, however my clutch was beginning to slip (now rebuilt) which meant missing two more races. I should add most of the other girder fork machines that I saw at Gerrards were wobbling. Inter Norton, Velos and Rudge. I did not see Mervyn Stratford's 250cc wobble though. The BHR machine specifications seem to fail to mention hydraulic steering dampers. The engine/gearbox plates on my bike are alloy and to me they look too thin, because they are the same thickness as steel ones. I would think they need to be at least as half as thick again. Perhaps this, combined with stickier tyres is causing, or part of, the problem. [/QUOTE]
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1938 Rudge Race Bike
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