When was the switch from "B" to "C" primary cover?
- Thread starter johnmead
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On the primary side there was a change to the clutch cover with the earliest being round with a change to a beveled bottom “corner”. C20 to C20/1? When did this occur?
I believe one of the original round covers was modified by a grinding process using a tarmac bonded abrasive held statically while the part to be machined was moved against it, in a linear plane, by a petrol powered machine.
I believe one of the original round covers was modified by a grinding process using a tarmac bonded abrasive held statically while the part to be machined was moved against it, in a linear plane, by a petrol powered machine.
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Thank you for the information. However, I am asking about the PRIMARY cover, not the timing cover. The "B" PRIMARY cover has a different hole pattern for the clutch dome than the "C". A "B" clutch dome cover will fit on a "C", but if you put a "C" clutch dome cover on a "B" the cornering clearance relief will not be on the bottom.
John Mead
John Mead
Curiously the table of Detail Modifications with pertinent engine numbers in Paul Richardson's Vincent does not mention the changes to the clutch dome. However in KTB Stevens states there were three types of cover, the first completely circular, the second with the 'cutaway', and the ventilated racing version. He goes on to say that "Location of the screws is different on early covers so that new holes have to be drilled and tapped to suit the later 'cutaway' covers."
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John,
I do not think there was a change over that can be identified. That is why I asked about the mating numbers and all these components had them right down to the generator cover. Aside from that I have in my notes F10AB/1/3077 as the last Series B. As far as I understand, the Factory made Series C models well prior to this number.
David
I do not think there was a change over that can be identified. That is why I asked about the mating numbers and all these components had them right down to the generator cover. Aside from that I have in my notes F10AB/1/3077 as the last Series B. As far as I understand, the Factory made Series C models well prior to this number.
David
engine for B and C were made in the same way engine assemble would not have known if it was going to be B or C, Ted Hampshire Did the frame stamping so he put R or RC but being human could have made a few mistakes
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TouringGodet
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David B., exactly, nothing related to the motor should be called Series B or C, like clutch covers, timing covers, gear change linkage, etc.. Those were all incremental changes made independent of Series.
David D., your noted number for the last Series B, is that one of the last Brampton factory fitted bikes that was part of a special order by Indian Sales? If so, even those may not be correctly called Series B's depending on some other details. I am not saying they are or are not, since I don't know what those other details are, but just using the fact they were factory built with Bramptons does not necessarily make a bike a Series B.
David D., your noted number for the last Series B, is that one of the last Brampton factory fitted bikes that was part of a special order by Indian Sales? If so, even those may not be correctly called Series B's depending on some other details. I am not saying they are or are not, since I don't know what those other details are, but just using the fact they were factory built with Bramptons does not necessarily make a bike a Series B.