fuel petcock question....
Forum rules
Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
-
frizzybone
- Settled in member
- Posts: 11
- Joined: Mon Aug 17, 2009 1:45 pm
fuel petcock question....
Hey guys,
just took off the tank to get to my carbs but realized that I had a minor problem... I couldnt stop the fuel from coming out from the petcock...
so i'm just wondering.. when the tap is put to RESERVE and ON, the fuel is supposed to run, rite? now what if the tap is put to OFF, is the fuel supposed to completely stop coming out??
is this something that needs to be fix to avoid other problems, or is it normal and can i just leave it like that?? thx
KC
just took off the tank to get to my carbs but realized that I had a minor problem... I couldnt stop the fuel from coming out from the petcock...
so i'm just wondering.. when the tap is put to RESERVE and ON, the fuel is supposed to run, rite? now what if the tap is put to OFF, is the fuel supposed to completely stop coming out??
is this something that needs to be fix to avoid other problems, or is it normal and can i just leave it like that?? thx
KC
-
CMSMJ1
- Moderators
- Posts: 7161
- Joined: Thu May 01, 2008 9:42 am
- Bike owned: NC30-No9
- Location: Chesterfield, United Kingdom
Re: fuel petcock question....
You will have had done to the tank what is commonly known as "the HRC fuel tap mod"
This is to remove the vacuum controlled flow by removing the diaphragm inside the tap.
You can replace the diaphragm with a tap rebuild kit or you can remember to turn it off..
The common consensus is to get it fixed unless you run a race bike.
Welcome to the site..
This is to remove the vacuum controlled flow by removing the diaphragm inside the tap.
You can replace the diaphragm with a tap rebuild kit or you can remember to turn it off..
The common consensus is to get it fixed unless you run a race bike.
Welcome to the site..
IMPERATOR REX ANGLORUM
The V4 is the law..
NC30 - No9 - my old mate
The V4 is the law..
NC30 - No9 - my old mate
-
The Hamster
- Settled in member
- Posts: 235
- Joined: Wed Apr 22, 2009 2:10 pm
Re: fuel petcock question....
CMSMJ1, regardless of a modified HRC Spec Tap or not, when the dial is in the Off position, or the middle of the three, then fuel shouldnt be coming out of the tap.
It sounds to me as if the tap inside, where the ball bearing controls the fuel flow, is shafted and needs replacing.
There isnt anything else it can be TBH!!!
It sounds to me as if the tap inside, where the ball bearing controls the fuel flow, is shafted and needs replacing.
There isnt anything else it can be TBH!!!
-
Spike16
- Site Supporter
- Posts: 1670
- Joined: Tue Apr 29, 2008 8:56 pm
- Bike owned: NC30 Road, SV650 Race
- Location: Hampshire, Wichester
Re: fuel petcock question....
i got a good condition fuel tap for sale and could even sell you a kit to convert your fuel tap back to standard from HRC spec if it has indeed been modified
-
frizzybone
- Settled in member
- Posts: 11
- Joined: Mon Aug 17, 2009 1:45 pm
Re: fuel petcock question....
thx guys, looks like i'll be needing to replace the fuel tap or buying the fuel tap repair kit from RicK Oliver, unless SPike16 is willing to ship to dubai..
is it relatively easy to repair the fuel tap? have u guys done it before??
is it relatively easy to repair the fuel tap? have u guys done it before??
-
fastdruid
- Regular Member
- Posts: 893
- Joined: Wed Apr 30, 2008 7:39 pm
Re: fuel petcock question....
Personally on a road bike I'd remove the 'HRC' tap mod, just not worth it as this can happen.
With a standard tap you have almost two taps, one that is manual and one automatic, you need both to fail in the open position to get petrol passing through unwanted. With the HRC 'mod' you only have one tap that isn't designed to be used by itself and over time can develop a leak which can result in ruined engines.
Druid
With a standard tap you have almost two taps, one that is manual and one automatic, you need both to fail in the open position to get petrol passing through unwanted. With the HRC 'mod' you only have one tap that isn't designed to be used by itself and over time can develop a leak which can result in ruined engines.
Druid