Hi
Could someone help, the petrol tank on my M20 has a 3/8" to 1/8" reduction fitted to take the petrol tap.

The petrol tap thread on one end measures 1/8" (.383 on the measuring caliper.) and .434 on the caliper at the other end which screws onto the metal fuel line.

What size and type of thread is .434 ?

Is the 3/8 to 1/8 reducer standard?

Are petrol taps and reducers this size easy to source?

All help appreciated

John B
North Yorkshire

[

John the thread that the pipe screws to, is 1/4" BSP. (British Standard Pipe)

Ron

email (option): ronpier@talk21.com

Tank adapters are available with either an 1/8"BSP internal thread or 1/4" BSP internal thread. I believe the standard one is 1/4"..at least every BSA tank I have had has been thus equipped.
I have also had M20 copper petrol pipes with nuts in either size..but again personally I have found the 1/4"BSP size to be more common...Ian

email (option): ian@wright52.plus.com

The thread in the tank is normally 3/8BSP Into this was screwed a filter adaptor (27-8436)which reduced from 3/8 to 1/8 BSP. The tap(27-8552)was 1/8 on the inlet with a 3/16BSP outlet.
Cheers, Mick.

email (option): mick@motorbikemike.org.uk

Hi Mick
Will send you a photo of my fuel tap etc.
I do not know how to post on this site will send it to your email
John B
North Yorkshire

Hi Ron
Thanks for replying and the info
John
B
N Yorkshire

Hi Ian
Thanks for the reply and info, many thanks
John B N Yorkshire.