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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: 106992" data-attributes="member: 1632"><p>Bill, That was what I was a little afraid of. The head disappearing into big wide world, never to be seen again.</p><p></p><p>TT, your mod it was I'm going with. Upon closer inspection, where the lock ring would engage the threads of the head has been worn away to such an extent it is nearly the same size as the major diameter where the rocker works. So no chance of going up a thread size. I've been looking at my choices of 7075 and I can easily obtain 7075-T6 in 1-1/4" diameter. I'm going to measure the valve guide bores and see if I need oversize or standard size guides. If I cannot get a suitably sized guide to replace the AWOL guide, I can buy C630 bronze to make my own. If all else fails my fall back plan is new heads.</p><p>Stay tuned.</p><p>Steven</p></blockquote><p></p>
[QUOTE="ClassicBiker, post: 106992, member: 1632"] Bill, That was what I was a little afraid of. The head disappearing into big wide world, never to be seen again. TT, your mod it was I'm going with. Upon closer inspection, where the lock ring would engage the threads of the head has been worn away to such an extent it is nearly the same size as the major diameter where the rocker works. So no chance of going up a thread size. I've been looking at my choices of 7075 and I can easily obtain 7075-T6 in 1-1/4" diameter. I'm going to measure the valve guide bores and see if I need oversize or standard size guides. If I cannot get a suitably sized guide to replace the AWOL guide, I can buy C630 bronze to make my own. If all else fails my fall back plan is new heads. Stay tuned. Steven [/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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