74 Kz400 fuel range

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20 Jan 2016 08:56 - 20 Jan 2016 08:58 #707378 by padgett
74 Kz400 fuel range was created by padgett
Hey guys,

Whats the range I should be expecting with this bike? Seems like I ran out of gas around 70 miles. Had to have a friend come by and put a gallon in my tank then the bike ran just fine back to my house.

This seems a little low, but let me know as this is my first kz400.

Thanks!

(also unsure if this is the right forum for this question, sorry)
Last edit: 20 Jan 2016 08:58 by padgett.

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  • ThatGPzGuy
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  • More Sparky than Speed Racer
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21 Jan 2016 01:39 #707474 by ThatGPzGuy
Replied by ThatGPzGuy on topic 74 Kz400 fuel range
Should probably be in the carb section. Anyway. yeah that range won't hunt. When I was riding my 76 KZ400 regular I was getting close to 60 mpg. Either the tank wasn't full, you are leaking fuel or are waaaaay too rich.
Jim
North GA
2016 Yamaha FJR1300ES
1982 GPz750 R1
1974 Kawasaki H1
1976 Kawasaki KZ400
1979 Yamaha XS650 cafe'
2001 KZ1000P
2001 Yamaha YZ426
1981 Honda XR200 stroked in an '89 CR125 chassis
1965 Mustang
1967 Triumph GT6
1976 Bronco
"If you didn't build it, it's not really yours"

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21 Jan 2016 02:03 - 21 Jan 2016 02:03 #707475 by martin_csr
Replied by martin_csr on topic 74 Kz400 fuel range
The bike probably needs a tuneup & maintenance. probably long overdue.

The KZ400.com site has a manual. The forum there may not be safe for your computer --- as reported by
someone on another kaw site. and I think the forum is inactive. not sure.
1981 KZ650 Competition Sports and Road
Last edit: 21 Jan 2016 02:03 by martin_csr.

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21 Jan 2016 13:46 - 21 Jan 2016 13:47 #707524 by TexasKZ
Replied by TexasKZ on topic 74 Kz400 fuel range
Do you know about the reserve fuel? When the petcock is on RUN and the engine starts to sputter, move the lever on the petcock to RESERVE, and you should have about 3/4 gallon more. Unless you are seriously in the boonies, that should get you to a gas station.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
Last edit: 21 Jan 2016 13:47 by TexasKZ.

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21 Jan 2016 13:48 #707526 by padgett
Replied by padgett on topic 74 Kz400 fuel range
Yep, i'm aware.

I'm fairly certain that my fuel filter is a poor quality (chinese ebay) and limiting the flow of fuel to my carbs. I'm gonna take it off and run it and see if i get some better results.

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21 Jan 2016 14:26 #707531 by peter1958
Replied by peter1958 on topic 74 Kz400 fuel range
If you do that make sure your gas tank is clean or you will have problems with fine grit or rust in your carbs!!!!!!!!!
www.kzzone.com/ cavanaughracing.com/kzdata.html www.mtceng.com/index.php/us-dealers/44-f...-performance-orlando

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21 Jan 2016 14:29 #707532 by padgett
Replied by padgett on topic 74 Kz400 fuel range
Yup, aware of that too. just part of narrowing down the issue.

Also i've used these type fuel filters in gravity fed applications before and it worked....ok...

any better options?
www.amazon.com/Visu-Filter-In-Line-Fuel-...andard/dp/B00388NNMS

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  • SWest
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  • 10 22 2014
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21 Jan 2016 14:50 #707535 by SWest
Replied by SWest on topic 74 Kz400 fuel range
Get one at your local Yamaha shop or bike shop.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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21 Jan 2016 18:14 #707548 by TexasKZ
Replied by TexasKZ on topic 74 Kz400 fuel range

padgett wrote: Yup, aware of that too. just part of narrowing down the issue.

Also i've used these type fuel filters in gravity fed applications before and it worked....ok...

any better options?
www.amazon.com/Visu-Filter-In-Line-Fuel-...andard/dp/B00388NNMS


I like this price and vendor better---

www.z1enterprises.com/product/TU15-1912-1
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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21 Jan 2016 18:18 #707549 by TexasKZ
Replied by TexasKZ on topic 74 Kz400 fuel range
A clean filter is a good idea, but I can't imagine a clogged one would cause you to get such crappy mileage. More likely to be a stuck float, a missing or unscrewed jet, or a broken overflow tube.
Are the sparkplugs really black?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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21 Jan 2016 19:46 #707554 by padgett
Replied by padgett on topic 74 Kz400 fuel range
not clogged, just the wrong type of filter for a gravity fed system

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22 Jan 2016 08:23 #707613 by pete greek1
Replied by pete greek1 on topic 74 Kz400 fuel range
Just do like Steve said, & go to a local motorcycle shop & get them there, no shipping charges & no wait, you can even try a local lawnmower repair shop
Pete
1980 LTD 1000..,1976 LTD 900, have the 1000&900 now. the rest are previous= 1978 KZ 650 B.., 1980 Yamaha XT 500..,1978 Yamaha DT 400.., 1977 Yamaha yz 80..,Honda trail ct 70.., Honda QA 50...5-1/2 hp brigs & straton CAT chopper mini bike...3-1/2 hp mini bike (WHEN GAS WAS ABOUT 45 CENTS A GALLON)!!!!

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