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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Rear Sprocket
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<blockquote data-quote="BigEd" data-source="post: 138404" data-attributes="member: 161"><p>Dear Paul,</p><p>The pipe I used is an offcut of uPVC black plastic that is used for guttering and downpipes. Probably from Screwfix 68 mm diameter, under a fiver for 2.5 metres but it sounds as if you got what you need. My guard is approximately 35 mm wide, the same width as the steel upper guard. If it is pipe not gutter cut a piece a little longer than the length of the guard you want to make and then slit it longitudinaly. Warm the pipe hot air gun or oven if your wife is out, (bachelors can discount this) and when it is pliable all over pull it as flat as you can by hand, lay it on a flat piece of wood and put another flat piece of wood on top and press it down until it cools. (You could use flat metal but this is likely to take away the heat too quickly To make the "U" shaped section warm a straight line down the centre and fold it over a round section of a diameter a little under the inside width you want for your guard. (Wood is best if you have something suitable, e.g. broom handle) The actual size is not critical and you can easily trim the length and shape it with a hacksaw, file or sander.</p><p>I fixed it to the torque arm with a couple of small bolts and the bracket was just a piece of flat metal. You may need to tweak your piece of metal a little or use a few washers as packers to get the chain to run down the centre.</p></blockquote><p></p>
[QUOTE="BigEd, post: 138404, member: 161"] Dear Paul, The pipe I used is an offcut of uPVC black plastic that is used for guttering and downpipes. Probably from Screwfix 68 mm diameter, under a fiver for 2.5 metres but it sounds as if you got what you need. My guard is approximately 35 mm wide, the same width as the steel upper guard. If it is pipe not gutter cut a piece a little longer than the length of the guard you want to make and then slit it longitudinaly. Warm the pipe hot air gun or oven if your wife is out, (bachelors can discount this) and when it is pliable all over pull it as flat as you can by hand, lay it on a flat piece of wood and put another flat piece of wood on top and press it down until it cools. (You could use flat metal but this is likely to take away the heat too quickly To make the "U" shaped section warm a straight line down the centre and fold it over a round section of a diameter a little under the inside width you want for your guard. (Wood is best if you have something suitable, e.g. broom handle) The actual size is not critical and you can easily trim the length and shape it with a hacksaw, file or sander. I fixed it to the torque arm with a couple of small bolts and the bracket was just a piece of flat metal. You may need to tweak your piece of metal a little or use a few washers as packers to get the chain to run down the centre. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Rear Sprocket
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