Supplies list:<\/p>\n
- \n
- 1 early model KZ750 Twin<\/li>\n
- 1 package of 1\/4″ x 24″ fuel line (Good Year, Prestone, or whatever is at your local auto parts store)<\/li>\n
- 2 inline 1\/4″ brass-element mini fuel filters (I get them from z1Enterprises.com whenever I’m ordering something else, but you can probably get them at any bike shop)<\/li>\n<\/ul>\n
When the KZ750 was designed, apparently the engineers never thought we’d have to worry about fine rust particles in the tank or inline fuel filters to compensate.\u00a0 Silly engineers.\u00a0 As a result, if you run without inline filters, installing fuel lines is an easy, intuitive breeze.<\/p>\n
However, since this is the real world, most of us do<\/em> have to worry about rust, and we do<\/em> have to use inline filters.\u00a0 And because of this, we have to do crazy, creative things in order to have room to accommodate the filters… and not cause them to bend and shut down fuel flow as they soften from extended contact with fuel… or melt from contact with the back of the engine.<\/p>\n
And this is why I’ve written this post;\u00a0 My goal was to find the best way to run the best fuel lines with the best fuel filters.\u00a0 Oh, and for me, “best” means “best possible at the least reasonable expense”.\u00a0 \ud83d\ude09<\/p>\n
So we start with my garage plan chicken-scratch drawing on the back of a dirty envelope to help convey my design layout:<\/p>\n
![\"Pathetic](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/4-drawing.jpg?resize=300%2C266&ssl=1\" "\\"Pathetic")
<\/a>Pathetic Diagram of Petcock, Fuel Lines, Filters, Carbs<\/p><\/div>\n
So, we start with one package of reasonable brand fuel line.\u00a0 I’ve always used Good Year line in the past, but this time AutoZone had Prestone.\u00a0 Whatever, it’s 24 inches of 1\/4 inch inner-diameter standard fuel line.<\/p>\n
![\"Package](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/1-fuelLinePackage.jpg?resize=300%2C260&ssl=1\" "\\"Package")
<\/a>Package of Reputable Brand 1\/4″ x 24″ Fuel Line<\/p><\/div>\n
As the design drawing above indicates, cut the line into four pieces as follows: 4″, 4.5″, 5″, and 10.5″ (or whatever is left).\u00a0 UPDATE, 2015: For the last couple years, I’ve actually modified the lengths a bit, and have been using 4″, 5″, 5″, and 9″ with great success.<\/p>\n
![\"Filters](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/2-cutLinesAndFilters.jpg?resize=300%2C210&ssl=1\" "\\"Filters")
<\/a>Filters and Fuel Lines, Cut To Size<\/p><\/div>\n
Assemble the parts so that the natural curves in the hose works in your favor, so that when assembled, the filter will be stressed as little as possible.\u00a0 I’m not sure if you can tell from the pic, but the curves are opposite.\u00a0 Here is the assembly order:<\/p>\n
Left: Petcock -> 10.5″ hose -> filter -> 4″ hose -> Left Carb<\/p>\n
Right: Petcock -> 4.5″ hose -> filter -> 5″ hose -> Right Carb<\/p>\n
![\"Assembled](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/3-assembledLinesAndFilters.jpg?resize=300%2C130&ssl=1\" "\\"Assembled")
<\/a>Assembled Fuel Lines And Filters<\/p><\/div>\n
Assembly Step 1:\u00a0 Connect the right line to the right carb.\u00a0 I hope you have small hands, it’s tight in there.\u00a0 You may have noticed in the pics that I have the tank sitting up on a wooden block for space.<\/p>\n
![\"Step1-](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/5-step1-rightLineToRightCarb.jpg?resize=300%2C225&ssl=1\" "\\"Step1-")
<\/a>Step1- Right Line To Right Carb<\/p><\/div>\n
Assembly Step 2:\u00a0 Complete the right line connection to the right output of the petcock.<\/p>\n
![\"Step2](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/6-step2-rightLineToPetcock.jpg?resize=300%2C225&ssl=1\" "\\"Step2")
<\/a>Step2 – Right Line To Petcock<\/p><\/div>\n
Assembly Step 3:\u00a0 Now feed the left side line assembly in from the right side, around the throttle cables and connect.<\/p>\n
![\"Step3](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/7-step3-leftLineToPetcock.jpg?resize=300%2C225&ssl=1\" "\\"Step3")
<\/a>Step3 – Left Line To Petcock<\/p><\/div>\n
Assembly Step 4:\u00a0 Finally, bring the line around and behind the other right side line, to connect to the left carb.<\/p>\n
![\"Step4](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/8-step4-leftLineToLeftCarb.jpg?resize=300%2C225&ssl=1\" "\\"Step4")
<\/a>Step4 – Left Line To Left Carb<\/p><\/div>\n
Here’s a finished view.\u00a0 Note that the filters are spaced offset from each other, they are not bent or stressed, and the lines and filters are not touching the engine.\u00a0 And hey, don’t hassle me about how dirty the engine\/carbs are, or that there are old hornets nests that I’ve never cleaned out…\u00a0 It’s a working man’s bike and that’s how I like it to look…\u00a0 \ud83d\ude09<\/p>\n
![\"Final](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/9-finalView.jpg?resize=300%2C225&ssl=1\" "\\"Final")
<\/a>Final View<\/p><\/div>\n
One additional caveat though…\u00a0 If you use the original stock ’76 – ’78 side covers, you will have to cut away a bit of the cover to accommodate the fuel line running where it was not intended to be.\u00a0 But if you do it with a nice, smooth arc, it doesn’t look out of place.<\/p>\n
![\"Side](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/10-sideCoverCutAway.jpg?resize=300%2C225&ssl=1\" "\\"Side")
<\/a>Side Cover Cut-Away<\/p><\/div>\n
I hope that helps!<\/p>\n
8)<\/p>\n","protected":false},"excerpt":{"rendered":"
I get asked about installation of replacement fuel lines and filters on the KZ750 Twins alot.\u00a0 Such a simple thing, but the topic has many fine points, and I wanted to provide as much detail as possible about my preferred…
Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[24,16],"tags":[],"class_list":["post-293","post","type-post","status-publish","format-standard","hentry","category-carb","category-replacement"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pEJEp-4J","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/kz750twins.com\/index.php?rest_route=\/wp\/v2\/posts\/293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kz750twins.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kz750twins.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kz750twins.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/kz750twins.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=293"}],"version-history":[{"count":7,"href":"https:\/\/kz750twins.com\/index.php?rest_route=\/wp\/v2\/posts\/293\/revisions"}],"predecessor-version":[{"id":536,"href":"https:\/\/kz750twins.com\/index.php?rest_route=\/wp\/v2\/posts\/293\/revisions\/536"}],"wp:attachment":[{"href":"https:\/\/kz750twins.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kz750twins.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kz750twins.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"Pathetic](\"https:\/\/i0.wp.com\/kz750twins.com\/wp-content\/uploads\/2010\/04\/4-drawing.jpg?ssl=1\" "\\"Pathetic")
<\/a>