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General Chat (Vincent Related)
Reg Bolton Racer
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<blockquote data-quote="greg brillus" data-source="post: 51350" data-attributes="member: 597"><p>Ok back to it.....Yes it is a Fontana 4 l/s front brake which Reg removed as his driveway is quite steep, and when cold and descending down the drive it would lock up , so he refitted the original size brakes/wheel assembly. The front end has got concentric bushes rather than eccentric, and the back was raised with longer rear springs and the UFM extension. So the longer rear lifts the bike for more ground clearance, a problem most racers have issues with at some stage or other. These alterations changed the trail, something Reg said he felt could have been even less......this completely contradicts what others have said. If you look at the second and fourth pictures you can see the lower link in a downward position, which we now know to be not all that good.....However when Reg was seated on the bike, the front springs compressed to where the link was about level. Reg fitted some of Laney Thornton's front springs of the lightest ones he was experimenting with back then and also longer than standard. My guess is they are around 90 lb each, so perhaps similar to the red springs Davidd made except longer. I watched Reg push up and down on the bars, and the forks seemed to compress to about half travel or more quite easily. As an aside Max queried the handling of John Surtees Lightning, and I have looked carefully at his bike, and most pictures I have seen, it shows the bike with it's original type steering damper......also it seems to me that his springs front and rear, were probably still way too stiff. The tank on Reg's bike was given to him by Chas Guy, and I'm sure some of you would have known of him. Reg said that he was a terrific chap, but sadly lost his life on the same day John Surtees crashed, when his head hit a tree.........Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 51350, member: 597"] Ok back to it.....Yes it is a Fontana 4 l/s front brake which Reg removed as his driveway is quite steep, and when cold and descending down the drive it would lock up , so he refitted the original size brakes/wheel assembly. The front end has got concentric bushes rather than eccentric, and the back was raised with longer rear springs and the UFM extension. So the longer rear lifts the bike for more ground clearance, a problem most racers have issues with at some stage or other. These alterations changed the trail, something Reg said he felt could have been even less......this completely contradicts what others have said. If you look at the second and fourth pictures you can see the lower link in a downward position, which we now know to be not all that good.....However when Reg was seated on the bike, the front springs compressed to where the link was about level. Reg fitted some of Laney Thornton's front springs of the lightest ones he was experimenting with back then and also longer than standard. My guess is they are around 90 lb each, so perhaps similar to the red springs Davidd made except longer. I watched Reg push up and down on the bars, and the forks seemed to compress to about half travel or more quite easily. As an aside Max queried the handling of John Surtees Lightning, and I have looked carefully at his bike, and most pictures I have seen, it shows the bike with it's original type steering damper......also it seems to me that his springs front and rear, were probably still way too stiff. The tank on Reg's bike was given to him by Chas Guy, and I'm sure some of you would have known of him. Reg said that he was a terrific chap, but sadly lost his life on the same day John Surtees crashed, when his head hit a tree.........Greg. [/QUOTE]
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General Chat (Vincent Related)
Reg Bolton Racer
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