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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fitting Dynamo with Eccentric Adaptor
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<blockquote data-quote="timetraveller" data-source="post: 112872" data-attributes="member: 456"><p>Rob, I wonder if you are not overthinking this and imagine that it is harder to do than it really is. There are two eccentricities. One is the 'B' adaptor and the other is the dynamo itself wherein the input shaft is offset from the centre of the 3" diameter of the dynamo body. Rotating either will move the dynamo pinion up or down. However, if you take some of the above advice and put a wedge into the slot on the 'B' adaptor and then play about rotating either or both you will find that in some positions the boss on the input to the dynamo fouls the front/rear/top/bottom of the hole in the crank case casting. Have a play about without trying to finish the job and get a feel of what rotation of what part does what. It will only take few attempts for you to get a good feel for what is happening. Then you can go for the final one and fix it in place. It is not complicated. You just need to play with it first and get a feel of what does what. If you are not sure about the mesh of the sprocket into the primary drive chain then there should be appreciable slop. If you cannot rock the pinion backwards and forwards, say, 2 or 3 mm then it will probably be too tight and will whine.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 112872, member: 456"] Rob, I wonder if you are not overthinking this and imagine that it is harder to do than it really is. There are two eccentricities. One is the 'B' adaptor and the other is the dynamo itself wherein the input shaft is offset from the centre of the 3" diameter of the dynamo body. Rotating either will move the dynamo pinion up or down. However, if you take some of the above advice and put a wedge into the slot on the 'B' adaptor and then play about rotating either or both you will find that in some positions the boss on the input to the dynamo fouls the front/rear/top/bottom of the hole in the crank case casting. Have a play about without trying to finish the job and get a feel of what rotation of what part does what. It will only take few attempts for you to get a good feel for what is happening. Then you can go for the final one and fix it in place. It is not complicated. You just need to play with it first and get a feel of what does what. If you are not sure about the mesh of the sprocket into the primary drive chain then there should be appreciable slop. If you cannot rock the pinion backwards and forwards, say, 2 or 3 mm then it will probably be too tight and will whine. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fitting Dynamo with Eccentric Adaptor
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