q¨ick release petrol cap - Kawasaki ZX-10R.net
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post #1 of 9 Old 04-27-2018, 12:07 PM Thread Starter
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q¨ick release petrol cap

Im having some issues with the petrol cap on my gen4.
Ordered a cheapo chinese one like ive had before and fitted it only to find it was leaking a bit of fuel when braking hard.
Its coming out the tiny breather hole.
I could plug this but the tank would get pressuried so i was wondering what do people do to get round this?
Probably wouldnt happen when the fuel is low but i never had this issue with my last one.
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post #2 of 9 Old 04-29-2018, 08:20 PM
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I trust that you kept the oem cap?
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post #3 of 9 Old 04-30-2018, 07:30 AM
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Why not just fix the problem vs. putting a band-aid on it? Don't settle for "cheapo" stuff on your $8000 machine. Get the good stuff that's actually backed by dealers and is provided by a company with actual customer support & warranties...

Yes, name-brand fuel caps are overpriced, but you can either afford them or you can't. If you can't, stick with OEM. If you still want to go down that knock-off road you better hope for the best but prepare for the worst... Leaky fuel cap? Tank that sparks on impact? In the end what are you willing to risk?

PS: That scenario is probably unlikely, but on a lighter note, fuel will start eat away at your paint over time if you don't wipe it off do it for the paint if anything haha!
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Last edited by ddipaola; 05-01-2018 at 09:08 AM.
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post #4 of 9 Old 05-03-2018, 03:25 PM Thread Starter
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Ive got an r1 to fund aswel so im all about the cheapo route lol.
But anyway the cap doesnt leak. The overflow pin hole leaks.
Whats the difference between expensive caps versus cheapo as regard breather holes?
Ive seen some have a breather pipe you stick directly into the overflow hole of the tank which i can do to mine but my point is fuel will dribble down into my belly pan on heavy breaking with a full tank of fuel.
Now that must happen with all after market ones?
Standard caps have a breather built into them that ive never notice leak.
But im just trying to save weight for upcoming trackdays.
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post #5 of 9 Old 05-04-2018, 06:54 PM
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overflow while fueling is designed to leak; once cap is closed, closed system.
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post #6 of 9 Old 05-05-2018, 04:24 PM Thread Starter
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Quote:
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overflow while fueling is designed to leak; once cap is closed, closed system.
Closed system yes but its got to breathe
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post #7 of 9 Old 05-06-2018, 09:06 PM
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Closed system yes but its got to breathe
You're micro observing stuff, again, which is not bad in itself. If you have a cap that leaks, get rid of it. No reason to sort it out.

End of story.
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post #8 of 9 Old 05-07-2018, 01:50 AM Thread Starter
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Quote:
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You're micro observing stuff, again, which is not bad in itself. If you have a cap that leaks, get rid of it. No reason to sort it out.

End of story.
I wouldnt say im micro observing this but i am observing it yes.
I bought a cap that looks like any other q/r cap but with a full tank it weaps out the breather but i think i sussed it.
Some of the dear ones are identical to mine but they have a tiny tube from the breather hole that you poke down into the tank breather hole so any leakage doesnt spill over the front of the tank.
Im an engineer so if theres a problem a look for the solution and try to fix it.
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post #9 of 9 Old 05-08-2018, 07:59 PM
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Quote:
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I wouldnt say im micro observing this but i am observing it yes.
I bought a cap that looks like any other q/r cap but with a full tank it weaps out the breather but i think i sussed it.
Some of the dear ones are identical to mine but they have a tiny tube from the breather hole that you poke down into the tank breather hole so any leakage doesnt spill over the front of the tank.
Im an engineer so if theres a problem a look for the solution and try to fix it.
Not fall back on engineering as we're talking riding and fuel leaking makes riding pia. Just change the cap back and then figure out what went wrong.

I know math so know how to tangle with math language, or engineering language. Indeed, math and riding intersect, but not when fuel is leaking!

you're a lot of fun and enjoy your posts.
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