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Car fuel filter on KZ
- loudhvx
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If interested, Sudco lists its highest quality fuel hose in size 9/32†(7.5mm) I.D.
SUDCO Gray Fuel Hose with Red Stripe Kitaco brand fuel hose, gray with red stripe. Highest quality fuel hose available. This hose is found on many ATV/motocross/offroad Keihin carburetors. Sold pre-cut foot length or cut to length. Made in Japan.
Here's the link > sudco.com/fuel.html
Fwiw, I often dip end of new fuel line in a cup of boiling water for a few moments just before pressing it onto a fitting. Makes it much easier to adapt a smaller line onto a larger barb.
Good Luck!
Thanks. I'll try the 5/16" size since it will be about perfect. The original factory hose, that I have a little bit of, looks to be 8mm, and fits perfectly.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- oldcoldankles
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Those are the ones I find to have the problems. They are in the video above. If they work for you, great, but I'm done with them. I've tried them on several bikes, and they fail to prime on all of them. I've noticed they are sold under several brand names, and I've tried most of them.
The fuel supplier I use has final filters on the pumps which I'm sure helps but I've used one of the filters described in my KZ550 now for over 20,000 miles. It now shows some discolouration but no sign of fuel starvation. Have you blown through the filters to determine relative restriction new/used?
Peachland BC
1981 KZ1000 CSR M1
1983 KZ550 LTD M1 (Shaft)
1989 Corvette coupe
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- ndeli55
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1978 kz650B stock
1973 rd250 (in 1000 pieces)
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- JMKZHI
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3/8 = 0.3750"
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- CoreyClough
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Have you tried a test where you have the fuel petcock on ON or RES, and after seeing that it won't flow like it's supposed to do on those positions, then take a longer vacuum hose, and suck on the vacuum line going the petcock. See if it will flow fuel then just as a test.
Paper fibers are supposed to swell up when wet. Maybe that's why it doesn't flow after sitting, without getting fuel on the paper again, or something like that???
Maybe trying the removal of the petcock diaphragm and spring, and test this again. Fuel should flow freely on all positions.
I take it you've checked the fuel screen on the petcock in the tank for any restrictions? I also have factory screen caps covering the fuel inlets to the float needle seats,but very fine dirt particles still pass into the bowls.
Needle Jet Inlet Screens
Will the fuel flow without the filter present?
I have several petcocks as well, and have seen the same thing you have Lou. Once I start the engine, and fuel gets to the filter, it will start to fill up. Sometimes on PRI I see no fuel in the filter, and after flicking it, it will flow a little.
Those paper filters filter very well, and clog in the process just like they are supposed to. The brass bead type will still allow very small dirt particles to get into the carb bowls, I know I've seen it when using a gas tank that the liner was peeling off from poor adhesion. I switched to the clear paper elements, just for that reason.
New and after 6000 miles
I have never had a fuel starvation issue on any of my GPz550's with the paper element, but have noticed it takes a little while to get fuel to flii up the carbs, when switching to RES while riding. This could be the reason.
Thanks for all your testing Lou.
'85 GPz550(ZX550-A2)
GPz550 Base Manual --> tinyurl.com/ze5b3qo
GPz550 Supplement Manual --> tinyurl.com/h34d2o6
GPz550.com --> www.nwsca.com/scripts/gpz_forum_2005/default.asp
First Race Win GPz550 --> tinyurl.com/o5y3ftp
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- loudhvx
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I agree, the paper filters filter very well. The carb bowls are always pretty clean when I inspect them, (about 3 or 4 times in the last year while doing jet changes). I just think they need a little positive pressure to work right, not just gravity.
It happens even when the filters are pretty new. I start to notice problems after a few weeks.
I'm going try sintered bronze filters. I bought a case of bronze elements for a chevy for next to nothing. I'll try one of them if I get a chance. I'm not holding my breath on those, though.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- Russ Jackson
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The one posted by Russ Jackson won't fit?
3/8 = 0.3750"
I guess I will have to take it off then seeing as it doesn't fit. I am using it on a set of 29s and it works fine. I had used ones similar to the ones posted but they clogged and did not flow enough for the smoothbores. It was a totally different bike after I changed over...Russ
1976 KZ 900 B1 29 smoothbores, Kerker, Lester Mags
2008 Kawasaki Concours 14 abs
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- loudhvx
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JMKZHI wrote:
The one posted by Russ Jackson won't fit?
3/8 = 0.3750"
I guess I will have to take it off then seeing as it doesn't fit. I am using it on a set of 29s and it works fine. I had used ones similar to the ones posted but they clogged and did not flow enough for the smoothbores. It was a totally different bike after I changed over...Russ
Hi Russ,
I think he was asking if the one you posted won't fit on my bike. Mine needs 5/16" inlet/outlet.
On my bike, the pipes are 5/16", but obviously the barbs on the ends of the pipes are larger than that. I'm pretty sure I could force the 5/16" hose onto the 3/8" fittings on the filter, but I should be able to find a 5/16 version, I'm sure.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- loudhvx
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The one posted by Russ Jackson won't fit?
3/8 = 0.3750"
I believe I could make it fit, but I'm pretty sure Ive seen 5/16" versions like that.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- Russ Jackson
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1976 KZ 900 B1 29 smoothbores, Kerker, Lester Mags
2008 Kawasaki Concours 14 abs
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- violentvintagecycles
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bountyhunter wrote:
loudhvx wrote:
I wish I could get a 5/16" sintered bronze filter in a clear container, but they are pretty scarce. I've seen some in aluminum containers, but they are a little too big to go where I want it.
These might fit.
cgi.ebay.com/ebaymotors/CHROME-FUEL-GAS-...mQQitemZ390072683108
Here's a clear one:
www.parkeryamaha.com/visufilterhigh-flow...lter516linesize.aspx
Thanks, those both look good. I've been looking at those aluminum cans with removable sintered elements. I thought they might be too big, but it's worth a try at this point. I hadn't seen that clear one before.
I have the aluminum can with removable filter, looks and works great so far.. Hot as hell out if i get out in the next few minutes ill take a pic for ya
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- violentvintagecycles
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