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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="macvette" data-source="post: 53287" data-attributes="member: 262"><p>Thanks MartynG that's the article I recall. My bike is a D and despite having the distributor rebuilt, I could not get the timing to be consistent. I had completely rebuilt the bike and it went well but not reliably. Last September , I finally stripped the distributor and found that the rebuild had been botched in that the pins holding the advance weights were loose and the nylon washer under the cam plate was too large a diameter and was hoopla hooping around the shaft interfering with the bob weights. This coupled with the loose pins explained the variable timing. I fitted the BTH and the bike was immediately easier to start and idled well. I rode it a little but not too hard because I was just coming to the end of running it in and put it away for the winter. It didn't show any symptoms. </p><p>When I started to ride this year and really open the bike up is when the hesitation started. In my case I could feel it at 60 mph in third and 70 in top. When I checked the plugs having tried to ride past this, the front plug was very sooty, the rear was fine. Having checked everything twice, I finally recalled the issue described above. I didn't think re routing the kill wire would work but in my case it has and the the bike now revs out freely, phew!</p><p>Again thanks for everyone's help, Mac</p></blockquote><p></p>
[QUOTE="macvette, post: 53287, member: 262"] Thanks MartynG that's the article I recall. My bike is a D and despite having the distributor rebuilt, I could not get the timing to be consistent. I had completely rebuilt the bike and it went well but not reliably. Last September , I finally stripped the distributor and found that the rebuild had been botched in that the pins holding the advance weights were loose and the nylon washer under the cam plate was too large a diameter and was hoopla hooping around the shaft interfering with the bob weights. This coupled with the loose pins explained the variable timing. I fitted the BTH and the bike was immediately easier to start and idled well. I rode it a little but not too hard because I was just coming to the end of running it in and put it away for the winter. It didn't show any symptoms. When I started to ride this year and really open the bike up is when the hesitation started. In my case I could feel it at 60 mph in third and 70 in top. When I checked the plugs having tried to ride past this, the front plug was very sooty, the rear was fine. Having checked everything twice, I finally recalled the issue described above. I didn't think re routing the kill wire would work but in my case it has and the the bike now revs out freely, phew! Again thanks for everyone's help, Mac [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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