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 Post subject: H2B carb oil lines?
PostPosted: Tue Feb 28, 2017 5:15 pm 
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Joined: Thu Sep 29, 2016 4:32 am
Posts: 615
Location: Indianapolis, IN
My newly imported H2B is missing some parts, I spent $900 on it over the last few days but I still do not have the carb oil lines. I find them here and there used, which is ok, but OMG, $280 or more! Any way to make some using existing banjos etc? I am guessing they have check balls in them to stop the fuel from back feeding into the oil pump, which makes them tricky to reproduce.

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1974 Kawasaki H2B 750, 1981 Yamaha XV750 Cafe, 1986 Kawasaki KDX200, 2003 Honda XR100, 2004 SDG140. 2006 Ninja 500R Turbo intercooled fuel injected.


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 Post subject: Re: H2B carb oil lines?
PostPosted: Tue Feb 28, 2017 5:33 pm 
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Joined: Tue Jun 07, 2011 6:36 am
Posts: 2691
Location: Dandridge, TN, USA
The special part of the lines are the check valves. You can use these at the bottom of the page http://www.kawatriple.com/checkvalves.htm
and mate them with tygon lines and standard banjo fittings.

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 Post subject: Re: H2B carb oil lines?
PostPosted: Thu Mar 09, 2017 2:02 am 
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Joined: Thu Sep 29, 2016 4:32 am
Posts: 615
Location: Indianapolis, IN
I found fittings and line I liked. STC valve have these 6mm thread/ 6mm hose push lock banjo fittings that seem to fit well. I ordered another taller one for the rear port missing in the pic. For the check valves I bought 5/32" dia stainless balls and 1/8" by 3/8" long stainless springs and put them in the carb bowls, slip a spring and a ball into each bowl thread and screw the push lock banjo in. I lightly countersunk the ends of the banjo bolts to make a place for the balls to seat against. The hose is flexible Nylon.


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1974 Kawasaki H2B 750, 1981 Yamaha XV750 Cafe, 1986 Kawasaki KDX200, 2003 Honda XR100, 2004 SDG140. 2006 Ninja 500R Turbo intercooled fuel injected.


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 Post subject: Re: H2B carb oil lines?
PostPosted: Thu Mar 09, 2017 6:39 am 
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Joined: Tue Jun 07, 2011 6:36 am
Posts: 2691
Location: Dandridge, TN, USA
What you have done looks good and very creative!
Did you measure the pop-off pressure of your check valve?
It should be 4.0-4.6psi, if too high you may end up with a seizure.

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 Post subject: Re: H2B carb oil lines?
PostPosted: Thu Mar 09, 2017 4:36 pm 
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Joined: Thu Sep 29, 2016 4:32 am
Posts: 615
Location: Indianapolis, IN
I haven't checked the pressure yet, but for sure will. One question, are the 4 oil pump outlet ports connected or do they feed separate? Wondered this because I would think the crank feed port could get less if the carb ones have low pop pressure.

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1974 Kawasaki H2B 750, 1981 Yamaha XV750 Cafe, 1986 Kawasaki KDX200, 2003 Honda XR100, 2004 SDG140. 2006 Ninja 500R Turbo intercooled fuel injected.


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 Post subject: Re: H2B carb oil lines?
PostPosted: Thu Mar 09, 2017 4:50 pm 
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Joined: Tue Jun 07, 2011 6:36 am
Posts: 2691
Location: Dandridge, TN, USA
All four oil pump ports deliver the same pressure and all check valves have the same cracking pressure.

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 Post subject: Re: H2B carb oil lines?
PostPosted: Wed Aug 16, 2017 11:42 am 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9826
Location: North Central NC
Specifically, each pump port gets its own positive displacement squirt in turn, so that each output is forced to get the same amount of oil, regardless of line length, etc..

(yes, very late to the party)

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If it surges, that's normal, upshift.


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 Post subject: Re: H2B carb oil lines?
PostPosted: Wed Aug 16, 2017 12:58 pm 
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Joined: Thu Sep 29, 2016 4:32 am
Posts: 615
Location: Indianapolis, IN
Thanks Jim. This system has been working good for me, I like how I can pull a carb off and never have to remove the fitting, banjo bolt, you just squeeze the purple lock collar and pull the line out, I slip a rubber 6mm ID rubber cap on the line while the carb is off. Can also service the check valve while working on that carb if needed.

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1974 Kawasaki H2B 750, 1981 Yamaha XV750 Cafe, 1986 Kawasaki KDX200, 2003 Honda XR100, 2004 SDG140. 2006 Ninja 500R Turbo intercooled fuel injected.


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 Post subject: Re: H2B carb oil lines?
PostPosted: Wed Aug 16, 2017 1:01 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9826
Location: North Central NC
Maybe you should write up an article to give to Dale for the resource site.

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If it surges, that's normal, upshift.


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 Post subject: Re: H2B carb oil lines?
PostPosted: Thu Aug 17, 2017 5:16 pm 
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Joined: Thu Sep 29, 2016 4:32 am
Posts: 615
Location: Indianapolis, IN
I had a request for the lines so I will write a page with part numbers etc shortly.

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1974 Kawasaki H2B 750, 1981 Yamaha XV750 Cafe, 1986 Kawasaki KDX200, 2003 Honda XR100, 2004 SDG140. 2006 Ninja 500R Turbo intercooled fuel injected.


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