How thick are the Shim Buckets?
• My micrometer and dial calipers are standard, not metric. Here are the measurements for a shim bucket, in inches, give or take a few thousandths of an inch. (The numbers in parenthesis are the closest rational conversions.) These were made with calipers on ONE bucket: O.D. = 1.319″ (33.5 mm) I.D. at shim = 1.140″ (29 mm) Height overall = 1.029″ (26 mm) Depth of shim depression = 0.078″ (2 mm) I didn’t measure the I.D. where it goes over the spring. C’est la vie. I measured the thickness between the where the valve tip hits and the shim depression, using a micrometer, on all four buckets and got: 0.0984″ 0.0985″ 0.0990″ 0.0996″ (Looks like 2.5mm, nominally.) Perhaps you noticed on page six of the latest (April ’02) Sprockets that the Ratay’s had an experience with valve collets wearing, “causing the top of the valve to sink dramatically, leaving very little gap in the clearance.” Have you EVER heard of collets wearing? They’re a taper fit and do not move. The only way I can think that
