{"id":1087,"date":"2021-07-30T14:00:44","date_gmt":"2021-07-30T14:00:44","guid":{"rendered":"https:\/\/www.alphabeta.me.uk\/blog\/?p=1087"},"modified":"2021-08-08T18:28:33","modified_gmt":"2021-08-08T18:28:33","slug":"engine-rebuild-top-end","status":"publish","type":"post","link":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/2021\/07\/30\/engine-rebuild-top-end\/","title":{"rendered":"Engine : Rebuild : Top end"},"content":{"rendered":"\n<p>The barrels have arrive from PJME with some nice new pistons.<br>Good Job.<br>Ports nicely chamfered in.<br>Everything went together nicely with no drama.<br><\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"4032\" height=\"3024\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2913-rotated-e1627740467279.jpg\" alt=\"\" data-id=\"1074\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2913-rotated-e1627740467279.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2913\/\" class=\"wp-image-1074\"\/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"3024\" height=\"4032\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2918-rotated.jpg\" alt=\"\" data-id=\"1075\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2918-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2918\/\" class=\"wp-image-1075\"\/><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>Next up&#8230; the reed cages and rubbers. this is all of the crap from the &#8220;parts box&#8221; accumulated over 30 years.<br>The YPVS and TZ cages and rubbers modded for 34mm carbs can go back in the box&#8230; I am going for a standard build here, and in any case, they won&#8217;t fit the unmodified barrels.<br>Ditto, the cages which have been filed out, again, standard build required.<br>I found a pair of unmodified cages, and some original reeds which I selected to do the job. they will need a bit of a clean up!<br>The rubbers are a little cracked, but not all the way through, and the area around the balance pipe fittings is sound on both.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2920-rotated.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"3024\" height=\"4032\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2920-rotated.jpg\" alt=\"\" data-id=\"1073\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2920-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2920\/\" class=\"wp-image-1073\"\/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2921-rotated.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"3024\" height=\"4032\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2921-rotated.jpg\" alt=\"\" data-id=\"1077\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/07\/IMG_2921-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2921\/\" class=\"wp-image-1077\"\/><\/a><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>Added the cylinder head reed blocks and carbs, then set the static timing.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-3 is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"2848\" height=\"2136\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922-2848x2136.jpg\" alt=\"\" data-id=\"1089\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2922\/\" class=\"wp-image-1089\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922-2848x2136.jpg 2848w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922-300x225.jpg 300w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922-768x576.jpg 768w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922-1536x1152.jpg 1536w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922-2048x1536.jpg 2048w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2922-1600x1200.jpg 1600w\" sizes=\"(max-width: 2848px) 100vw, 2848px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"2848\" height=\"2136\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931-2848x2136.jpg\" alt=\"\" data-id=\"1104\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2931\/\" class=\"wp-image-1104\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931-2848x2136.jpg 2848w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931-300x225.jpg 300w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931-768x576.jpg 768w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931-1536x1152.jpg 1536w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931-2048x1536.jpg 2048w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2931-1600x1200.jpg 1600w\" sizes=\"(max-width: 2848px) 100vw, 2848px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2919-rotated.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"3024\" height=\"4032\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2919-rotated.jpg\" alt=\"\" data-id=\"1095\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2919-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2919-2\/\" class=\"wp-image-1095\"\/><\/a><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>I had marked the stator when I took it off by scribing a line on it where the case joins.<br>After finding TDC using a dial gauge, and backing off 2mm, (as per the Haynes manual), I found that the engine had been timed at 1mm BTDC by the previous owner. Deliberate? who knows.<br>I scribed a new line on the stator at 2mm BTDC and tightened it all up.<\/p>\n\n\n\n<p>I added the carbs because I wanted to <br>a) Cut a piece of petrol pipe to the correct length to join the carbs.<br>b) Check the length of the oil feed lines.<br><br>Curiously, the oil lines which I had taken from various old oil pumps from the parts box, were the wrong lengths.<br>The shorter one for the RHS carb was about 3cm too short, and the longer one for the LHS carb, when routed under the carbs was circa 20cm too long.<br>I took the precaution of ordering a length of oil line\/fuel overflow pipe from Norbo at RDLCCrazy, so I&#8217;ll cut that to length. It has the added advantage of being transparent, so I can see the oil flowing through when bleeding the oil pump.<\/p>\n\n\n\n<p>There&#8217;s nothing left to do now but put the engine in the bike! Another milestone of sorts.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-1 is-cropped wp-block-gallery-4 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"2848\" height=\"2136\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934-2848x2136.jpg\" alt=\"\" data-id=\"1123\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2934\/\" class=\"wp-image-1123\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934-2848x2136.jpg 2848w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934-300x225.jpg 300w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934-768x576.jpg 768w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934-1536x1152.jpg 1536w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934-2048x1536.jpg 2048w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/08\/IMG_2934-1600x1200.jpg 1600w\" sizes=\"(max-width: 2848px) 100vw, 2848px\" \/><\/a><\/figure><\/li><\/ul><figcaption class=\"blocks-gallery-caption\">Visible progress!<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The barrels have arrive from PJME with some nice new pistons.Good Job.Ports nicely chamfered in.Everything went together nicely with no&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1087"}],"collection":[{"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=1087"}],"version-history":[{"count":6,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1087\/revisions"}],"predecessor-version":[{"id":1154,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1087\/revisions\/1154"}],"wp:attachment":[{"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=1087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=1087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=1087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}