Original petrol taps

F

Flo

Joined

Aug 4, 2009

Messages

777

• Mar 8, 2010

• #1

My 850 Mk.1 has taps that screw into the tank up to a flange. All the other taps I see for sale etc. have a locknut on them, yet they are sold as original type taps. Also, mine have a nylon insert, all others have brass. Never seen the type I have for sale, are they rare? I can't get on with these locknut types, seem to leak on me.
There was never a Mk.1, until there was a MK.2 :lol: :lol: :lol: :lol: :lol:

 

Danno

Joined

Feb 7, 2010

Messages

4,195

• Mar 8, 2010

• #2

Good luck finding originals. I had to go with the aftermarket, locknut types. Many of the originals had a plastic core that hardens and breaks over time. My plan is to wrap the threads in teflon pipe thread tape before assembly and use the rubber-lined sealing washers on the nut.

 

N

norbsa48503

Joined

Apr 7, 2004

Messages

1,691

• Mar 9, 2010

• #3

If you don't use the thin flat washer with the sealing washer when you tighten the jam nut the rubber will skip out. Good dealers who sell the sealing washers are assuming you have kept your flat washers for re-use. The sealing washers are a one use affair.

 

P

pelican

Joined

May 2, 2009

Messages

1,390

• Mar 9, 2010

• #4

Anyone know of any aftermarket petcocks that are longer and have a disconnect coupler built in?

 

rvich

VIP MEMBER

Joined

Jul 25, 2009

Messages

3,188

• Mar 9, 2010

• #5

Be careful with teflon tape...it is really intended more to lube the threads than to seal, and gas will wick along the tape if it is not tight enough. To get it tight enough means you gotta really torque on your tank fitting. Kinda scares me. I would lean toward one of the available liquid thread sealers if I were to put something on those threads.

 

MichaelB

"Sons of Arthritus"

VIP MEMBER

Joined

Jan 14, 2004

Messages

2,448

• Mar 9, 2010

• #6

norbsa48503 said:

If you don't use the thin flat washer with the sealing washer when you tighten the jam nut the rubber will skip out. Good dealers who sell the sealing washers are assuming you have kept your flat washers for re-use. The sealing washers are a one use affair.

Click to expand...

Very good point.

 

K

Keith1069

Joined

Jan 10, 2005

Messages

1,043

• Mar 9, 2010

• #7

Norvil sell these Dowty style washers and they work well. Mine have been in use 12 years with BAP taps and the locknut. I should use a washer next to the nut as suggested but they've been OK. I'm sure lots of other places have them.
http://www.norvilmotorcycle.co.uk/065329.jpg