{"id":3850,"date":"2019-02-13T15:23:29","date_gmt":"2019-02-13T14:23:29","guid":{"rendered":"https:\/\/terraroot.neoneoism.com\/?p=3850"},"modified":"2019-02-13T15:27:51","modified_gmt":"2019-02-13T14:27:51","slug":"88cc-head-porting-part-deux","status":"publish","type":"post","link":"https:\/\/terraroot.neoneoism.com\/?p=3850","title":{"rendered":"88cc head porting part deux"},"content":{"rendered":"

So to start with this head is off a 107cc, it has a large angled squish band and more meat and length to the inlet, it also uses the longer cam here:<\/p>\n

http:\/\/dratv.com\/6licamwiaude.html<\/p>\n

pic of the stock intake, horrible casting, spring seat protrudes really far into the throat. pretty much the same as a stock honda 90 head.<\/p>\n

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Valve seats first, much sand paper and course lapping compound. crap job, so i went back to taking lumps out of the intake.<\/p>\n

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raised the port roof, smoothed down the spring seat hump<\/p>\n

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i say smoothed…<\/p>\n

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back to vavles seats<\/p>\n

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after many many little bits of sandpaper and some help from a drill to spin the valve, the seats are good enough.<\/p>\n

Porting is complete, spent more time opening the valve seat throats, they did not match the head very well at all, also widened the port where the stem sits, i could do better but i do i need to spend that much time and foul-stroke?<\/p>\n

24mm carb fitted, note how close the bowl is to the head, i think it would not fit a stock 90 head, but it fits this one so i’m all ready!<\/p>\n

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Race bike needs both brakes, i don’t have a two foot long foot so to match my rear sets i gotta make a brake pedal. and i don’t have a lotta spare metal lying around so the original super tucked in pedal will have to be sacrificed.<\/p>\n

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scraps of metal found and half the day spent poking at stuff<\/p>\n

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original pin chopped down and welded to frame as pivot.<\/p>\n

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Discovers my nice inverter arc welder is actually a piece of shit. i thought it was damp rods, but no, it’s just shit. super cheap tiny AC buzz box welder worked flawlessly.<\/p>\n

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Nope! pushing the rod is not going to work, feck. problem for the next day.<\/p>\n

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you know them niggly problems that take years off your life? this wasn’t one thank feck it, converted the throttle cable from a tiny nib thats supposed to act on the carb slide, to a…<\/p>\n

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..Large round nipple, yeah suck it SEO.<\/p>\n

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things to do before race day on the 23rd:<\/p>\n

lots, not gonna lie and attempt to make a list, i just have lots to do and tools to buy.<\/p>\n","protected":false},"excerpt":{"rendered":"

So to start with this head is off a 107cc, it has a large angled squish band and more meat and length to the inlet, it also uses the longer cam here: http:\/\/dratv.com\/6licamwiaude.html pic of the stock intake, horrible casting, spring seat protrudes really far into the throat. pretty much the same as a stock […]<\/p>\n","protected":false},"author":964,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-3850","post","type-post","status-publish","format-standard","hentry","category-honda-cub-90"],"_links":{"self":[{"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=\/wp\/v2\/posts\/3850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=\/wp\/v2\/users\/964"}],"replies":[{"embeddable":true,"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3850"}],"version-history":[{"count":3,"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=\/wp\/v2\/posts\/3850\/revisions"}],"predecessor-version":[{"id":3853,"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=\/wp\/v2\/posts\/3850\/revisions\/3853"}],"wp:attachment":[{"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/terraroot.neoneoism.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}