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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Series ‘D’ Rear Bodywork mounting to Series ‘C’ Comet
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<blockquote data-quote="davidd" data-source="post: 101947" data-attributes="member: 1177"><p>Craig,</p><p></p><p></p><p>Starting with the hardest mod first, I would recommend taking the frame out of the tub and once it is modified, refitting the tub to the frame. The swing arm pivot on the Comet is 1/2" forward and 1" up or higher on the Comet than it is on the twin. It could be that you could add an extra free standing pivot to the Comet just to be the lower mount. It is difficult to say without the pieces at hand. Also, the pivot needs to be fairly robust as the entire tub is cantilevered off the swing arm pivot and the top mount. The top is in tension and the swing arm pivot is in compression and has to take all the weight of the riders, tub and gear.</p><p></p><p>If you look at the Victor photo you can see how much higher the swing arm pivot is. In the photo of the tub for the twin the pivot is at the bottom of the glass and on the Victor it is up much higher.</p><p></p><p>As for the upper mount, if you remove the frame and modify it you can use it on any of the existing upper tubes. The seat tube may do. I have slotted the sidecar tube and moved the damper and spring boxes down there, so if the height is closer to the second tube down you could do that. Additionally, you can do something like the Reg Bolton mode to bolt to the UFM and move the seat and/or suspension back from the UFM.</p><p></p><p>I do not know about the twin brake rods because the D RFM does not have the means to mount them so I am not sure about the clearances. However, I would think they would work as is. I don't think the rear guard will fit in the space between the wheel and the tub. As for the brake switch, the stock D brake switch on the balance beam is far safer for all Vincent riders.</p><p></p><p>Personally, I would separate the frame and the tub as mentioned. It will allow you to modify the frame to fit the way you want, including the seat height and you can put the tub on and trim it to fit well on the bike.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 101947, member: 1177"] Craig, Starting with the hardest mod first, I would recommend taking the frame out of the tub and once it is modified, refitting the tub to the frame. The swing arm pivot on the Comet is 1/2" forward and 1" up or higher on the Comet than it is on the twin. It could be that you could add an extra free standing pivot to the Comet just to be the lower mount. It is difficult to say without the pieces at hand. Also, the pivot needs to be fairly robust as the entire tub is cantilevered off the swing arm pivot and the top mount. The top is in tension and the swing arm pivot is in compression and has to take all the weight of the riders, tub and gear. If you look at the Victor photo you can see how much higher the swing arm pivot is. In the photo of the tub for the twin the pivot is at the bottom of the glass and on the Victor it is up much higher. As for the upper mount, if you remove the frame and modify it you can use it on any of the existing upper tubes. The seat tube may do. I have slotted the sidecar tube and moved the damper and spring boxes down there, so if the height is closer to the second tube down you could do that. Additionally, you can do something like the Reg Bolton mode to bolt to the UFM and move the seat and/or suspension back from the UFM. I do not know about the twin brake rods because the D RFM does not have the means to mount them so I am not sure about the clearances. However, I would think they would work as is. I don't think the rear guard will fit in the space between the wheel and the tub. As for the brake switch, the stock D brake switch on the balance beam is far safer for all Vincent riders. Personally, I would separate the frame and the tub as mentioned. It will allow you to modify the frame to fit the way you want, including the seat height and you can put the tub on and trim it to fit well on the bike. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Series ‘D’ Rear Bodywork mounting to Series ‘C’ Comet
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