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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Help: Rings for a +.030" Specialloid Piston wanted
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<blockquote data-quote="miked" data-source="post: 42871" data-attributes="member: 1821"><p>Thanks for the replies chaps! </p><p>As Bill mentions, the spares company rings are deeper than the originals, which are only available in STD, +.020" & +.040" sizes.</p><p>It did cross my mind to machine the piston to accept the +.040" rings (as I had already purchased a set) and then gap them to suit. I was unsure that machining the groove wouldn't weaken the piston & if there was a risk of the modified ring being under too much (sprung) tension. </p><p>It would also be on the limit of my modest skills, so I would be "putting a job out", which always invloves its fair share of hassle / disappointment. </p><p></p><p>I'm no expert Howard, but I think +.030" was a standard oversize from the factory, but yes I suppose today it is not a common one - hence my predicament...</p><p></p><p>Cheers,</p><p></p><p>Mike</p></blockquote><p></p>
[QUOTE="miked, post: 42871, member: 1821"] Thanks for the replies chaps! As Bill mentions, the spares company rings are deeper than the originals, which are only available in STD, +.020" & +.040" sizes. It did cross my mind to machine the piston to accept the +.040" rings (as I had already purchased a set) and then gap them to suit. I was unsure that machining the groove wouldn't weaken the piston & if there was a risk of the modified ring being under too much (sprung) tension. It would also be on the limit of my modest skills, so I would be "putting a job out", which always invloves its fair share of hassle / disappointment. I'm no expert Howard, but I think +.030" was a standard oversize from the factory, but yes I suppose today it is not a common one - hence my predicament... Cheers, Mike [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Help: Rings for a +.030" Specialloid Piston wanted
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