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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="nkt267" data-source="post: 23756" data-attributes="member: 245"><p>This only applies to Mk2's. You can fit Mk1 and Mk3 without modifying the valve guides as the lift is the same. Mk2 cams lift more and so the valve collar can hit the top of the lower valve guide. The correct way to modify valve guides for Mk2's is to remove 1/16th inch from the top of the guide and remake the taper on the top of the guide to allow oil to run off, but I am sure that there are a lot of people out there that have just filed (water tap reseating tool?<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek! :eek:" loading="lazy" data-shortname=":eek:" />)the top guide down and had no problems..John</p></blockquote><p></p>
[QUOTE="nkt267, post: 23756, member: 245"] This only applies to Mk2's. You can fit Mk1 and Mk3 without modifying the valve guides as the lift is the same. Mk2 cams lift more and so the valve collar can hit the top of the lower valve guide. The correct way to modify valve guides for Mk2's is to remove 1/16th inch from the top of the guide and remake the taper on the top of the guide to allow oil to run off, but I am sure that there are a lot of people out there that have just filed (water tap reseating tool?:eek:)the top guide down and had no problems..John [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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