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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fogging for Mosquitos; Valve Guide Issues and Solutions
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<blockquote data-quote="ClassicBiker" data-source="post: 114466" data-attributes="member: 1632"><p>In Post #41 Time Traveler refers to a thread about a clamp device. Well that was the route I went with. I took the design that was posted in that thread and ran with it. I wanted to have the seal type valve guides on all the valves. I bought a length of 1.25" diameter 7075 to make it from. On the bottom I spot faced to take the "X" ring seal supplied by the Spare Co. Unfortunately I made it 0.010" short so I made a shim that I super glued to the bottom of the Upper Guide. I ordered 8 valve circlips, it was lucky I did, not because they shot off into another dimension but because in fitting this it was in and out a couple of times. I had decided to use the modified locking rocker bush. This pulls the rocker bush to the top of the rocker tunnel. Which is all well and good but as I did up the modified feed bolt the bush pulled up and clearance between the rocker arm and clamp disappeared. So it had to come out. I felt it would be foolish to re-use the circlips when I had extra. After a couple of goes I finally managed to get an amount to clearance that satisfied me.</p><p>[ATTACH=full]31650[/ATTACH][ATTACH=full]31651[/ATTACH][ATTACH=full]31652[/ATTACH]</p><p></p><p>But I began to worry that oil would build up under the clamp and seep between the clamp and lower valve guide negating "X" ring seal in the clamp. So knowing that the shoulder of the valve guide is 0.057" thick and 0.625" in diameter I went looking for Viton O rings which are good to 425 degrees F and placed that down the well.</p><p></p><p>[ATTACH=full]31653[/ATTACH][ATTACH=full]31654[/ATTACH]</p></blockquote><p></p>
[QUOTE="ClassicBiker, post: 114466, member: 1632"] In Post #41 Time Traveler refers to a thread about a clamp device. Well that was the route I went with. I took the design that was posted in that thread and ran with it. I wanted to have the seal type valve guides on all the valves. I bought a length of 1.25" diameter 7075 to make it from. On the bottom I spot faced to take the "X" ring seal supplied by the Spare Co. Unfortunately I made it 0.010" short so I made a shim that I super glued to the bottom of the Upper Guide. I ordered 8 valve circlips, it was lucky I did, not because they shot off into another dimension but because in fitting this it was in and out a couple of times. I had decided to use the modified locking rocker bush. This pulls the rocker bush to the top of the rocker tunnel. Which is all well and good but as I did up the modified feed bolt the bush pulled up and clearance between the rocker arm and clamp disappeared. So it had to come out. I felt it would be foolish to re-use the circlips when I had extra. After a couple of goes I finally managed to get an amount to clearance that satisfied me. [ATTACH type="full"]31650[/ATTACH][ATTACH type="full"]31651[/ATTACH][ATTACH type="full"]31652[/ATTACH] But I began to worry that oil would build up under the clamp and seep between the clamp and lower valve guide negating "X" ring seal in the clamp. So knowing that the shoulder of the valve guide is 0.057" thick and 0.625" in diameter I went looking for Viton O rings which are good to 425 degrees F and placed that down the well. [ATTACH type="full"]31653[/ATTACH][ATTACH type="full"]31654[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fogging for Mosquitos; Valve Guide Issues and Solutions
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