{"id":10296,"date":"2013-01-10T10:37:03","date_gmt":"2013-01-10T15:37:03","guid":{"rendered":"http:\/\/www.chinonthetank.com\/?p=10296"},"modified":"2021-08-24T12:47:41","modified_gmt":"2021-08-24T17:47:41","slug":"cb500t-engine-rebuild-part-2","status":"publish","type":"post","link":"https:\/\/www.chinonthetank.com\/2013\/01\/cb500t-engine-rebuild-part-2\/","title":{"rendered":"cb500t &#8211; engine rebuild &#8211; Part 2"},"content":{"rendered":"<p><a href=\"https:\/\/www.chinonthetank.com\/2021\/04\/2021-cb450-rebuild\/\">2021 update \u2013 click here. Below is deprecated info\u2026<\/a><\/p>\n<ul>\n<li><a href=\"https:\/\/www.chinonthetank.com\/2012\/12\/cb500t-engine-rebuild-part-1\/\">Read about rebuild Part 1<\/a><\/li>\n<\/ul>\n<p>Ok&#8230; So, I had a couple different machine shops do a couple different things for me.<\/p>\n<h2>First machine shop:<\/h2>\n<p>Mar Automotive<br \/>\n4345 Orchard Street,<br \/>\nPhiladelphia, PA 19124<br \/>\n(215) 288-7320<\/p>\n<p>They&#8217;ve done cylinder head stuff for me in the past:<br \/>\n&#8211; they did a valve job on my S2000 like 5 years ago<br \/>\n&#8211; they did a <a href=\"https:\/\/www.chinonthetank.com\/2010\/07\/cb650-engine-rebuild-step-2-3-of-4\/\">valve job on my cb650<\/a> like 3 years ago<\/p>\n<p>So, I vouch for them. They&#8217;re fast, cheap, and quality.<br \/>\nAll they do is cylinder heads and valve trains. All day long every day. That&#8217;s it.<\/p>\n<h3>What they did:<\/h3>\n<p>&#8211; 3-angle valve job on the 500t head.<br \/>\n&#8211; Blasted it clean.<br \/>\n&#8211; Skimmed the deck to make sure it&#8217;s flat.<\/p>\n<p>A 3-angle valve job is the best way to get your valves to seat. Think of it this way. If you&#8217;re looking to keep costs down&#8230; lap the valves yourself and you&#8217;ll probably be okay.<\/p>\n<p>I talked to a couple people and they convinced me to get a full on valve job done instead of lapping.<\/p>\n<p>3-angle valve job means, the valve seat has literally 3 angles. Normally 30\u02da \/ 45\u02da \/ 60\u02da. They actually cut new angles to ensure everything is seating correctly. It&#8217;s more accurate than lapping.<\/p>\n<h3>Price:<\/h3>\n<p>&#8211; $100 and it was done in 1 day.<\/p>\n<p>Below pic: Damn that shit looks good.<\/p>\n<div class=\"cott-article__copy-img\"><a href=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-01.jpg\"><img decoding=\"async\" src=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-01.jpg\" \/><\/a><\/div>\n<p>Freshly cut seats.<\/p>\n<div class=\"cott-article__copy-img\"><a href=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-02.jpg\"><img decoding=\"async\" src=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-02.jpg\" \/><\/a><\/div>\n<p>Valves cleaned up more.<\/p>\n<div class=\"cott-article__copy-img\"><a href=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-03.jpg\"><img decoding=\"async\" src=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-03.jpg\" \/><\/a><\/div>\n<p>Pretty sure they painted the head silver after blasting it clean.<\/p>\n<div class=\"cott-article__copy-img\"><a href=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-04.jpg\"><img decoding=\"async\" src=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-04.jpg\" \/><\/a><\/div>\n<h2>Second machine shop:<\/h2>\n<p>Powerseal USA<br \/>\n337 Coldstream Road,<br \/>\nPhoenixville, PA 19460<br \/>\n(484) 921-5121<\/p>\n<p>I heard this place does a good job with boring cylinders and milling decks and stuff of that nature. I&#8217;ve never used them before.<\/p>\n<p>They&#8217;re a bit out of the way being 30 miles away. Fuck it. Figured I&#8217;d give them a go.<\/p>\n<p>The guy was cool and said he&#8217;s built cb450 engines before. Works for me&#8230;<\/p>\n<h3>What they did:<\/h3>\n<p>&#8211; Bore the cylinders out from a 70mm to a 74mm.<br \/>\n&#8211; Mill .010&#8243; from the top of the cylinders (raise compression 1\/4 point)<br \/>\n&#8211; Cleaned everything and honed the fresh cylinders.<\/p>\n<h3>Price:<\/h3>\n<p>&#8211; $180 and it was done in a week.<\/p>\n<p>Below Pic: These are the pistons sitting in the cylinders.<\/p>\n<p>I found a pair of Todd Henning 11.5 compression race pistons on eBay for a price I could live with.<br \/>\nMy 500t engine is now a 550cc. Badass. And in a cb450&#8230; extra badass.<\/p>\n<div class=\"cott-article__copy-img\"><a href=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-05.jpg\"><img decoding=\"async\" src=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-05.jpg\" \/><\/a><\/div>\n<p>See how they are sitting just below the deck. If I actually had a cb450, they would sit flush, and would actually yield 11.5 to 1 compression.<\/p>\n<p>After talking to a few people, I finally realized the 500t engine is different with it&#8217;s placement of the wrist-pin on the piston. Ahhhhh.<\/p>\n<p>So&#8230;<br \/>\nlong story short, if you put 450 pistons in a 500t, they yield lower compression because they sit below deck height as seen in the below pic.<\/p>\n<p>So&#8230;<br \/>\nThese 11.5 pistons really are going to yield 10.5 compression in my engine. This is why I milled the cylinders .010&#8243;, to raise compression again and bring them closer to the deck height.<\/p>\n<p>So&#8230;<br \/>\nI should have somewhere around 10.7 compression in this engine. Which should be fucking awesome considering stock compression is 8.5 &#8230; hahah. Looks like I&#8217;m always running 93 octane! Fuck it.<\/p>\n<div class=\"cott-article__copy-img\"><a href=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-06.jpg\"><img decoding=\"async\" src=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-06.jpg\" \/><\/a><\/div>\n<p>The pistons domes have cut-outs for the valves. Cool.<\/p>\n<div class=\"cott-article__copy-img\"><a href=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-07.jpg\"><img decoding=\"async\" src=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-07.jpg\" \/><\/a><\/div>\n<p>Another thing to note. You can&#8217;t put an OEM cb450 piston in a 500t. It will hit the crank because the piston skirts are longer. All cb450 race pistons made by people like Henning \/ Hanson \/ M3 \/ Charlie Place &#8230; all shave down the skirt&#8230; so their 450 race pistons all fit 500t engines. Just account for the lower deck height.<\/p>\n<p>For example; Charlie Place cb450 race piston kit is 10.1 compression&#8230; So in a 500t this will yield 9.1 because the piston will be sitting lower in the cylinders due to the wrist-pin placement.<\/p>\n<p>Make sense? Okay.<\/p>\n<div class=\"cott-article__copy-img\"><a href=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-08.jpg\"><img decoding=\"async\" src=\"https:\/\/www.chinonthetank.com\/wp-content\/uploads\/2013\/01\/cb500t-cylinders-finished-08.jpg\" \/><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>2021 update \u2013 click here. Below is deprecated info\u2026 Read about rebuild Part 1 Ok&#8230; So, I had a couple different machine shops do a couple different things for me. First machine shop: Mar Automotive 4345 Orchard Street, Philadelphia, PA 19124 (215) 288-7320 They&#8217;ve done cylinder head stuff for me in the past: &#8211; they [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10297,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,6,222,24],"tags":[],"_links":{"self":[{"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/posts\/10296"}],"collection":[{"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/comments?post=10296"}],"version-history":[{"count":21,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/posts\/10296\/revisions"}],"predecessor-version":[{"id":22467,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/posts\/10296\/revisions\/22467"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/media\/10297"}],"wp:attachment":[{"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/media?parent=10296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/categories?post=10296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/tags?post=10296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}