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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: 111105" data-attributes="member: 1632"><p>I read Martyn's attachment and it got me thinking. So I started to make my own steady bush that will locate on the upper valve guide seat area. As I am going to ream the hole for front exhaust lower guide in the head to clean up that hole, I was thinking of making my guide bush with interchangeable bushes at the very top to accommodate the different size shanks of the reamers I will be using rather than make two steady bushes.</p><p>Which then lead me to thinking about cutting the valves seats prior to lapping them in. Which leads to the question which cutter sizes? I believe from searching through threads here the angle I need is 30 degrees as they are the original seats. I was thinking on purchasing one or two of these cutters <a href="https://www.cylinderheadsupply.com/cu616.html" target="_blank">https://www.cylinderheadsupply.com/cu616.html</a> but wasn't sure of the size. I was worried that the inserts might contact the lip of the cylinder head. Has anyone used this type of cutter or similar?</p><p>Slowly and cautiously moving forward.</p><p></p><p>Steven</p></blockquote><p></p>
[QUOTE="ClassicBiker, post: 111105, member: 1632"] I read Martyn's attachment and it got me thinking. So I started to make my own steady bush that will locate on the upper valve guide seat area. As I am going to ream the hole for front exhaust lower guide in the head to clean up that hole, I was thinking of making my guide bush with interchangeable bushes at the very top to accommodate the different size shanks of the reamers I will be using rather than make two steady bushes. Which then lead me to thinking about cutting the valves seats prior to lapping them in. Which leads to the question which cutter sizes? I believe from searching through threads here the angle I need is 30 degrees as they are the original seats. I was thinking on purchasing one or two of these cutters [URL]https://www.cylinderheadsupply.com/cu616.html[/URL] but wasn't sure of the size. I was worried that the inserts might contact the lip of the cylinder head. Has anyone used this type of cutter or similar? Slowly and cautiously moving forward. 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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