{"id":12348,"date":"2014-04-17T08:45:06","date_gmt":"2014-04-17T13:45:06","guid":{"rendered":"http:\/\/www.chinonthetank.com\/?p=12348"},"modified":"2016-05-05T15:27:11","modified_gmt":"2016-05-05T20:27:11","slug":"1975-dt175b-rebuild-engine-reassembly","status":"publish","type":"post","link":"https:\/\/www.chinonthetank.com\/2014\/04\/1975-dt175b-rebuild-engine-reassembly\/","title":{"rendered":"1975 DT175B Rebuild | Engine Reassembly"},"content":{"rendered":"

I got the top end back from Mar Automotive<\/a> all nicely cleaned, honed, and painted for $50. I really recommend these guys. They open at 7:30am which makes it easy to drop\/pickup parts before heading to work.<\/p>\n

\"GetSeriousPtTwo-5\"<\/a><\/div>\n

I found an NOS piston and rings on Ebay for $130 which is expensive but it was the only option. My head is a stock bore of 60mm and Wiseco and Prox do not make an piston for it. There are plently of new pistons for the 1977+ models which are not compatiable because of the wrist pin location from the top of the piston. So, I was stuck having to buy expensive NOS. Came in some cool packaging though.<\/p>\n

\"GetSeriousPtTwo-6\"<\/a><\/div>\n

This is the best example I was able to find of the comparison of early vs late dt175 pistons. I might be completely wrong about this but there’s so little well documented info out there between all these different year DT’s. <\/p>\n

\"Dt175PistonComparison\"<\/a><\/div>\n

Checked ring gap at .4mm which is within spec.<\/p>\n

\"GetSeriousPtTwo-8\"<\/a><\/div>\n

These rings have locating pins on the piston so and they have to be installed with the ‘V’ to accomodate that pin.<\/p>\n

\"GetSeriousPtTwo-9\"<\/a><\/div>\n

Lubed everything up with 2 stroke oil before assembling. The wrist pin and bearing I took off were worn out so I got new ones along with new clips. Another $40 in parts. After ordering from BikeBandit I found that Yamaha has a site: http:\/\/www.yamahapartshouse.com were you can get all the same OEM parts and it’s a little cheaper.<\/p>\n

\"GetSeriousPtTwo-7\"<\/a><\/div>\n

I used Hylomar to prep the copper head gasket. <\/p>\n

\"GetSeriousPtTwo-10\"<\/a><\/div>\n

Assembling a single piston 2 stroke top ends is dumb easy compared to 4 strokes. Torqued the head to 15 ft lbs.<\/p>\n

\"GetSeriousPtTwo-11\"<\/a><\/div>\n

I had a few different plans for making the 21″ MR125 Honda Elsinore front wheel fit my stock forks. The main issue is the brake sits 1\/4″ away from the stock fork stop. To keep it simple, I decided to just extend the stop to fit into the brake. <\/p>\n

\"GetSeriousPtTwo-2\"<\/a><\/div>\n

Came out pretty nice. I’m a little out of practice with my aluminum welding so Rick did it for me quick. With a little file work it’ll look stock.<\/p>\n

\"GetSeriousPtTwo-3\"<\/a><\/div>\n

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

I got the top end back from Mar Automotive all nicely cleaned, honed, and painted for $50. I really recommend these guys. They open at 7:30am which makes it easy to drop\/pickup parts before heading to work. I found an NOS piston and rings on Ebay for $130 which is expensive but it was the […]<\/p>\n","protected":false},"author":1,"featured_media":12338,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[156,204,24,224],"tags":[],"_links":{"self":[{"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/posts\/12348"}],"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=12348"}],"version-history":[{"count":7,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/posts\/12348\/revisions"}],"predecessor-version":[{"id":12358,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/posts\/12348\/revisions\/12358"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/media\/12338"}],"wp:attachment":[{"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/media?parent=12348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/categories?post=12348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chinonthetank.com\/wp-json\/wp\/v2\/tags?post=12348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}