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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet timing
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<blockquote data-quote="Chris Launders" data-source="post: 178417" data-attributes="member: 2010"><p>I'm just fitting an electric start to my Norton Dominator, I have a (probably) Norvil clutch in which there is a backing plate fastened inside with countersunk Allen screws, so I've machined a piece of 5mm steel plate with a bore to match the clutch bearing and the outer takes a post 1981 Sportster ring gear.</p><p>The plate is aligned by removing the clutch inner and bearing retaining circlip and pressing another bearing into the housing (on top of the existing one) and removing one countersunk screw and drilling the plate and tapping it, replace with a longer screw and repeated until I had four in.</p><p>I shall be using additional screws as there are not enough at present to take the torque.</p><p></p><p>I'm using a standard Sportster starter motor/solenoid unit but have changed the gearbox shell to a AJS/Matchless one to give a better starter location as the lugs are in a different position to the Norton unit, but I've aligned the box so the end covers are in the same orientation as the Norton ones were.</p><p></p><p>This is it using a borrowed frame and some of my spare parts and some I've bought (so I don't have to take anything off the bike) to prototype it.</p><p></p><p>Started after Christmas, everything now made ready for paint etc.</p><p></p><p>PS it has a downdraught head with a single Concentric and should clear the starter motor by over 1/2"</p><p></p><p></p><p>[ATTACH=full]61780[/ATTACH][ATTACH=full]61781[/ATTACH]</p></blockquote><p></p>
[QUOTE="Chris Launders, post: 178417, member: 2010"] I'm just fitting an electric start to my Norton Dominator, I have a (probably) Norvil clutch in which there is a backing plate fastened inside with countersunk Allen screws, so I've machined a piece of 5mm steel plate with a bore to match the clutch bearing and the outer takes a post 1981 Sportster ring gear. The plate is aligned by removing the clutch inner and bearing retaining circlip and pressing another bearing into the housing (on top of the existing one) and removing one countersunk screw and drilling the plate and tapping it, replace with a longer screw and repeated until I had four in. I shall be using additional screws as there are not enough at present to take the torque. I'm using a standard Sportster starter motor/solenoid unit but have changed the gearbox shell to a AJS/Matchless one to give a better starter location as the lugs are in a different position to the Norton unit, but I've aligned the box so the end covers are in the same orientation as the Norton ones were. This is it using a borrowed frame and some of my spare parts and some I've bought (so I don't have to take anything off the bike) to prototype it. Started after Christmas, everything now made ready for paint etc. PS it has a downdraught head with a single Concentric and should clear the starter motor by over 1/2" [ATTACH type="full" alt="P1000565.JPG"]61780[/ATTACH][ATTACH type="full" alt="P1000579.JPG"]61781[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet timing
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