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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin Valve Timing
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<blockquote data-quote="Cyborg" data-source="post: 80750" data-attributes="member: 3426"><p>Doesn't seem pedantic at all. The reason why I'm still farting around with this, is because the NOS cams that I got with the bike had that dip you are referring to. I ordered new ones from Terry. On a side note I wish they didn't have quite so much lift. Anyway, once assembled I will do as you suggest. I agree it it the only way to measure it accurately. One reason being it seems like rocker ratios are a little random. I have a sufficient supply of dial gauges.. I just need to cobble together one more holder. Keeping in mind that I haven't been inside one of these engines for decades, my approach or some of my questions may seem a little odd. I still have to deal with installing the cam pinion on the front cam, setting the backlash, and selecting the 1/2 time pinion. I'm thinking this would be way easier to accomplish without dealing with spring pressure. I don't know for sure, but I believe the steady plate should be fastened in place when checking lift. I'm operating under the assumption that without the plate, the front spindle will deflect under spring pressure and have an effect on the readings. As previously mentioned, I hope to set both cams with dial gauges running off the rockers. If they end up being out, at least in theory, they will both be out the same amount and I can make an adjustment at the 1/2 time pinion. I sure that as I perform this task, I will answer some of my own questions and come up with some new ones.</p></blockquote><p></p>
[QUOTE="Cyborg, post: 80750, member: 3426"] Doesn't seem pedantic at all. The reason why I'm still farting around with this, is because the NOS cams that I got with the bike had that dip you are referring to. I ordered new ones from Terry. On a side note I wish they didn't have quite so much lift. Anyway, once assembled I will do as you suggest. I agree it it the only way to measure it accurately. One reason being it seems like rocker ratios are a little random. I have a sufficient supply of dial gauges.. I just need to cobble together one more holder. Keeping in mind that I haven't been inside one of these engines for decades, my approach or some of my questions may seem a little odd. I still have to deal with installing the cam pinion on the front cam, setting the backlash, and selecting the 1/2 time pinion. I'm thinking this would be way easier to accomplish without dealing with spring pressure. I don't know for sure, but I believe the steady plate should be fastened in place when checking lift. I'm operating under the assumption that without the plate, the front spindle will deflect under spring pressure and have an effect on the readings. As previously mentioned, I hope to set both cams with dial gauges running off the rockers. If they end up being out, at least in theory, they will both be out the same amount and I can make an adjustment at the 1/2 time pinion. I sure that as I perform this task, I will answer some of my own questions and come up with some new ones. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin Valve Timing
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