{"id":816,"date":"2020-08-24T12:38:19","date_gmt":"2020-08-24T11:38:19","guid":{"rendered":"https:\/\/www.sunbeamland.com\/wordpress\/?p=816"},"modified":"2020-09-25T08:56:43","modified_gmt":"2020-09-25T07:56:43","slug":"sunbeam-3-speed-gearbox-bearings-1928-onwards","status":"publish","type":"post","link":"https:\/\/www.sunbeamland.com\/wordpress\/?p=816","title":{"rendered":"Sunbeam 3-speed gearbox bearings, 1928 and 1929 onwards"},"content":{"rendered":"\n
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Thanks to Chris Fisher for suggesting suitable quality bearings for the 1929 onwards 3-speed gearbox I’m putting together at the moment. The gearbox will be a CT close ratio type and is for a 1928 Model 6 that has been modified in the deep and distant past to house a hybrid OHV motor. The motor employs 1930\/1931 crankcases with 1927 single port head breathed on by Chris Odling to take a new Amal 289. So, the whole bike is a “bitsa” but now goes very well with a 7.5:1 forged Model 90 piston from the sunbeamland shop. <\/p>\n\n\n\n

I might point the “Model 69″ up a couple of hill climbs once the gearbox rebuild stops it dropping out of 2nd gear and we fit a 19” rear rim – it will then take a pair of the excellent Avon race compound Speedmaster and GP tyres.<\/p>\n\n\n\n

1929\/1930 Bearings<\/strong>:<\/p>\n\n\n\n

  1. 1 off RHP LJ1-2RSJ<\/li>
  2. 1 off RHP MJ7\/8-2RSJ<\/li>
  3. 2 off RHP KLNJ3\/4J<\/li><\/ol>\n\n\n\n

    The earlier 1928 wide case box has a smaller mainshaft diameter and consequently an RMS 6 bearing in the case rather than the RMS 7 of the later type. In this case the RHP MJ3\/4-2RSJ looks like it could be a good fit.<\/p>\n\n\n\n

    1928 Bearings<\/strong>:<\/p>\n\n\n\n

    1. 1 off RHP LJ1-2RSJ<\/li>
    2. 1 off RHP MJ3\/4-2RSJ<\/li>
    3. 2 off RHP KLNJ3\/4J<\/li><\/ol>\n\n\n\n

      With the outer bearings being sealed it might be a good idea to consider implementing a small breather hole in the gearbox filler cap.<\/p>\n\n\n\n

      <\/p>\n","protected":false},"excerpt":{"rendered":"

      Thanks to Chris Fisher for suggesting suitable quality bearings for the 1929 onwards 3-speed gearbox I’m putting together at the moment. The gearbox will be a CT close ratio type and is for a 1928 Model 6 that has been … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[87,86,68,85,67,45,44,15,10],"class_list":["post-816","post","type-post","status-publish","format-standard","hentry","category-bikes","tag-bearings","tag-gearbox","tag-long-stroke","tag-lonsgtroke","tag-model-6","tag-model-8","tag-model-9","tag-model-90","tag-sunbeam"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/816","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=816"}],"version-history":[{"count":2,"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/816\/revisions"}],"predecessor-version":[{"id":821,"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/816\/revisions\/821"}],"wp:attachment":[{"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sunbeamland.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}