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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fuel Tank Petcocks
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<blockquote data-quote="oexing" data-source="post: 120899" data-attributes="member: 1493"><p>Nothing to do with ethanol or modern fuel that seemed to be the root of the troubles with these taper fit fuel petcocks. Really the combination of brass body with brass taper is non-working for extended time, you get seizures and galling with like materials, just like tightening an alu nut on an alu bolt - or same with all stainless steel - seizures guaranteed. You can get the taper hardchromed and lap it in the body with super fine paste. Or do a stainless steel taper mod and no trouble ever after as I did with numerous petcocks on my bikes. Look at your brass tapers that were stuck with a magnifier, lots of seizure traces so no more sealing.</p><p></p><p> Vic</p></blockquote><p></p>
[QUOTE="oexing, post: 120899, member: 1493"] Nothing to do with ethanol or modern fuel that seemed to be the root of the troubles with these taper fit fuel petcocks. Really the combination of brass body with brass taper is non-working for extended time, you get seizures and galling with like materials, just like tightening an alu nut on an alu bolt - or same with all stainless steel - seizures guaranteed. You can get the taper hardchromed and lap it in the body with super fine paste. Or do a stainless steel taper mod and no trouble ever after as I did with numerous petcocks on my bikes. Look at your brass tapers that were stuck with a magnifier, lots of seizure traces so no more sealing. Vic [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Fuel Tank Petcocks
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