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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Cams ????
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<blockquote data-quote="redbloke1956" data-source="post: 23913" data-attributes="member: 2299"><p>Hi all, As I mentioned in a previous post I have just received my newMk 3 cams....<span style="font-size: 10px"><span style="color: red"><strong><em><u>OR HAVE I ?</u></em></strong> <span style="font-family: 'Arial'"><span style="font-size: 9px"><span style="color: #000000">I<span style="font-family: 'Verdana'"> went for the Mk111 to minimise modification to the bike, while fitting the cams I noticed that when the cam was rotated, the exhaust cam lobe made contact with the Exhaust valve lifter arm ET69FAS, yet the original cam (even though worn) did not, I then took measurement from bottom of base circle to top of lobe on the cam and it is .050" (50 thou) larger than the original. (in my very humble opinion I don't think a worn cam could be missing 50 thou off the lobe...assuming base circle has little wear)</span></span></span></span></span></span></p><p><span style="font-size: 9px">I contacted the Gent I purchased them from (<strong>New</strong>, from a reputable seller/manufacturer, marked as a Mk3) and asked if they may have been a Mk2 and incorrectly marked, the response was that I should file/grind a little off the ET69FAS to give clearance, he also first told me to adjust the Valve lifter and give it a little more slack, again in my opinion I would think that it shouldn't matter the position of the lifter, it should never be possible for it to make contact with the cam?<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite5" alt=":confused:" title="Confused :confused:" loading="lazy" data-shortname=":confused:" /></span></p><p><span style="font-size: 9px">Am I missing something here? Is this a common occurrence?</span></p><p> </p><p><span style="font-size: 9px">Kevin</span></p></blockquote><p></p>
[QUOTE="redbloke1956, post: 23913, member: 2299"] Hi all, As I mentioned in a previous post I have just received my newMk 3 cams....[SIZE=2][COLOR=red][B][I][U]OR HAVE I ?[/U][/I][/B] [FONT=Arial][SIZE=1][COLOR=#000000]I[FONT=Verdana] went for the Mk111 to minimise modification to the bike, while fitting the cams I noticed that when the cam was rotated, the exhaust cam lobe made contact with the Exhaust valve lifter arm ET69FAS, yet the original cam (even though worn) did not, I then took measurement from bottom of base circle to top of lobe on the cam and it is .050" (50 thou) larger than the original. (in my very humble opinion I don't think a worn cam could be missing 50 thou off the lobe...assuming base circle has little wear)[/FONT][/COLOR][/SIZE][/FONT][/COLOR][/SIZE] [SIZE=1]I contacted the Gent I purchased them from ([B]New[/B], from a reputable seller/manufacturer, marked as a Mk3) and asked if they may have been a Mk2 and incorrectly marked, the response was that I should file/grind a little off the ET69FAS to give clearance, he also first told me to adjust the Valve lifter and give it a little more slack, again in my opinion I would think that it shouldn't matter the position of the lifter, it should never be possible for it to make contact with the cam?:confused:[/SIZE] [SIZE=1]Am I missing something here? Is this a common occurrence?[/SIZE] [SIZE=1][/SIZE] [SIZE=1]Kevin[/SIZE] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Cams ????
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