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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Potential problems
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<blockquote data-quote="Monkeypants" data-source="post: 116019" data-attributes="member: 2708"><p>With the Valve lifter you could check the operation where the cable attaches to the lifter.</p><p>There are different cable abutments out there( the tube portion). I learned this when I swapped the cable & abutment from one Rapide to the other. The setup that works perfectly on my OZ Rapide does not work properly on the other Rapide.</p><p>In effect you end up trying to pull the end off the cable as the lengths are all wrong and the cable is working against itself. So it's very stiff at the handle end but doesn't fully lift the valves.</p><p>Put it back on the other bike and all is well.</p><p>Sorry I can't explain the function better, but if you observe that connection and operation at the engine end, it will quickly become clear as to whether things there are correct or not.</p><p>In my case the borrowed tube was too short. The lifter mechanism came to the top end of the tube before the valves were lifted or the hand lever was fully drawn up.</p><p>Any force used from this point on was just working to break the cable.</p><p>Even before the swap, the valve lifter mechanism on that bike had never been right. The binding problem had been occurring to a lesser degree. That's why the cable end came off. Then the swap just made things worse.</p><p>The solution was to make up a new cable and tube of correct length for that bike. Now it's an easy two finger lift, same as the Oz Rapide.</p><p>One other way to deal with this problem would be to adjust the position of the valve lifter internal parts. You have to remove timing cover and the steady plate to get at these parts on the Rapide.</p><p>That's a lot of work, much easier to make a new tube or cable if needed.</p><p>If you are making a new cable I recommend the Teflon lined Venhills Featherlight. This type of cable has reduced friction and needs no maintenance, ( lube) ever.</p><p>They will make them to order for you, or you can purchase universal kits and make up your own. I've done a bit of both here.</p><p>For the most important cables, the front brake, I had them made up to my drawing.</p><p>For everything else, the universal kits are great.</p><p></p><p>Glen</p></blockquote><p></p>
[QUOTE="Monkeypants, post: 116019, member: 2708"] With the Valve lifter you could check the operation where the cable attaches to the lifter. There are different cable abutments out there( the tube portion). I learned this when I swapped the cable & abutment from one Rapide to the other. The setup that works perfectly on my OZ Rapide does not work properly on the other Rapide. In effect you end up trying to pull the end off the cable as the lengths are all wrong and the cable is working against itself. So it's very stiff at the handle end but doesn't fully lift the valves. Put it back on the other bike and all is well. Sorry I can't explain the function better, but if you observe that connection and operation at the engine end, it will quickly become clear as to whether things there are correct or not. In my case the borrowed tube was too short. The lifter mechanism came to the top end of the tube before the valves were lifted or the hand lever was fully drawn up. Any force used from this point on was just working to break the cable. Even before the swap, the valve lifter mechanism on that bike had never been right. The binding problem had been occurring to a lesser degree. That's why the cable end came off. Then the swap just made things worse. The solution was to make up a new cable and tube of correct length for that bike. Now it's an easy two finger lift, same as the Oz Rapide. One other way to deal with this problem would be to adjust the position of the valve lifter internal parts. You have to remove timing cover and the steady plate to get at these parts on the Rapide. That's a lot of work, much easier to make a new tube or cable if needed. If you are making a new cable I recommend the Teflon lined Venhills Featherlight. This type of cable has reduced friction and needs no maintenance, ( lube) ever. They will make them to order for you, or you can purchase universal kits and make up your own. I've done a bit of both here. For the most important cables, the front brake, I had them made up to my drawing. For everything else, the universal kits are great. Glen [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Potential problems
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