Author Topic: Leaking petrol  (Read 404 times)

Tzr3ma

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Leaking petrol
« on: April 02, 2020, 05:26:52 PM »
Hi all one of my carbs are leaking fuel from needle jet when I twist
 throttle with bike not running  ?:-|

Kev

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Re: Leaking petrol
« Reply #1 on: April 02, 2020, 07:31:40 PM »
Float valve sticking, tap the bowl with a screwdriver or something, if no joy they will need a service.
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Tzr3ma

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Re: Leaking petrol
« Reply #2 on: April 02, 2020, 07:39:22 PM »
Thanks Kev have tap bowl and have had service kit fitted

metoo

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Re: Leaking petrol
« Reply #3 on: April 03, 2020, 09:07:20 AM »
Rust or dirt in the tank?
Had the same problem with my 1KT due to rust and other crap in the tank.
The little flakes made both the vacuum fuel tap and the bowl needles leak.
It got better with a total of three inline filters but the final solution was to clean the tank properly
Cheers
Mike

mellorp

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Re: Leaking petrol
« Reply #4 on: April 03, 2020, 10:35:12 AM »
To clean the tank of all debris it needs to be dry. Drain all fuel and leave it in an open place for a day or two to let all the fuel evaporate. Give it a good shake to remove as much as possible, then swill it round with lots of boiling water with some 2T oil in. That should get all the debris out. Boiling water should evaporate from the tank quicker and the oil helps to stop any more flash rusting. The important bit is getting all the debris out as it's probably already rusty it can't really make it any worse.
Mellion say If it ain't broke thrash it until it breaks

tzr-v4

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Re: Leaking petrol
« Reply #5 on: April 03, 2020, 10:53:25 AM »
In addition to previous tips.

If tank not badly rusted, I'm using phosphoric acid solution (from DIY shop) to remove surface rust.
After, clean with fresh water and try it fast using sun + hot air gun.

Some time, I've to repeat to remove the rust.

If too badly rusted then you'll have pin holes !!!

Olivier.
Olivier.
TZR250 2MA & 2XT, RD500s et TZR-V4 building...

Tzr3ma

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Re: Leaking petrol
« Reply #6 on: April 03, 2020, 11:24:38 AM »
Hi thanks the bike is hooked up to a portable fuel tank

teezer250

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Re: Leaking petrol
« Reply #7 on: April 03, 2020, 01:14:08 PM »
Look at the "o" ring on the float valve seat,might be perished and leaking fuel past.
Also the float valve's needle seat may be worn also leaking fuel past.

mellorp

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Re: Leaking petrol
« Reply #8 on: April 03, 2020, 08:18:49 PM »
Look at the "o" ring on the float valve seat,might be perished and leaking fuel past.
Also the float valve's needle seat may be worn also leaking fuel past.
This happens a lot on RGV's. People replace everything when all they need is the tiny £2.50 float O ring. How do I know .............. 
Mellion say If it ain't broke thrash it until it breaks

Tzr3ma

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Re: Leaking petrol
« Reply #9 on: April 03, 2020, 11:05:18 PM »
Thanks  Mellorp i did replace o rings but the ones in carbs seem to have flat sides is that correct if so were can you buy them from  ?:-|

mellorp

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Mellion say If it ain't broke thrash it until it breaks