Author Topic: 51 Plunger Tank Strap and other questions.  (Read 3592 times)

Offline brissy_bsa

  • Moving Up
  • **
  • Join Date: Jan 2007
  • Posts: 36
  • Karma: 0
  • A new 1951 A10 Golden Flash owner
51 Plunger Tank Strap and other questions.
« on: 20.04. 2010 06:25 »
I have a 51 A10 Plunger and have noticed to protruding luggs/bolts underneath the tank (front end). They tell me I need to place a strap between the two ( just a strip of steel to brace it). Is there are part number for that? Is that what the luggs are for?

Secondly, Can anyone tell me what the part numbers are for:

1. The washers for the oil feeder pipe rocket cover end and also the bolts.

Hope someone can be of help.

Ian

Offline Josh Cox

  • Valued Contributor
  • ****
  • Join Date: Apr 2009
  • Posts: 275
  • Karma: 0
Re: 51 Plunger Tank Strap and other questions.
« Reply #1 on: 20.04. 2010 06:38 »
washer 15-203
bolt 65-306

You can make the strap out of steel, apparently it stops the centre of the tank from cracking.
Black 1953 Golden Flash Plunger

Offline gold33

  • A's Best Friend
  • ***
  • Join Date: Feb 2009
  • Posts: 110
  • Karma: 1
Re: 51 Plunger Tank Strap and other questions.
« Reply #2 on: 20.04. 2010 08:00 »
Always wondered why they were there.

Is the strap necessary? were they chrome or the colour of the frame?
I don't know if I have a strap fitted or not but I think I would have noticed if I did.

Darren
Darren
'52 Plunger

Offline brissy_bsa

  • Moving Up
  • **
  • Join Date: Jan 2007
  • Posts: 36
  • Karma: 0
  • A new 1951 A10 Golden Flash owner
Re: 51 Plunger Tank Strap and other questions.
« Reply #3 on: 20.04. 2010 08:53 »
Thanks josh. um Darren, i have no idea, but if it stops the tank from splitting, well I will just make a strap and bolt it in, better safe than sorry. ian

Offline Josh Cox

  • Valued Contributor
  • ****
  • Join Date: Apr 2009
  • Posts: 275
  • Karma: 0
Re: 51 Plunger Tank Strap and other questions.
« Reply #4 on: 20.04. 2010 10:09 »
Painted apparently.
Black 1953 Golden Flash Plunger

Offline MikeN

  • A's Best Friend
  • ***
  • Join Date: Mar 2009
  • Posts: 220
  • Karma: 0
Re: 51 Plunger Tank Strap and other questions.
« Reply #5 on: 20.04. 2010 12:23 »
I would definately fit the strap . Its to tie the 2 sides of the saddle tank together and stop fracturing from vibration. lots of makes of bike have them . Ive repaired a couple of (Velocette) tanks that have split on the saddle at the front end through ommitting this part.
Mike

Online Brian

  • Wise & Enlightened
  • *
  • Join Date: May 2007
  • Posts: 1699
  • Karma: 40
  • Mt Gambier, South Australia.
Re: 51 Plunger Tank Strap and other questions.
« Reply #6 on: 20.04. 2010 12:40 »
And again, definitely fit the strap.

For the owners of central bolted type tanks, eg,swingarm models this is extremely important, do not ride your bike unless this strap is fitted or else the tank will eventually crack around the central hole, not might, will.

Offline RichardL

  • Outside Chicago, IL
  • Wise & Enlightened
  • *
  • Join Date: Nov 2007
  • Posts: 4937
  • Karma: 46
Re: 51 Plunger Tank Strap and other questions.
« Reply #7 on: 20.04. 2010 12:53 »
I'm glad this topic has come up. I have a 2-1/2 gallon tank on my S/A frame and the strap passes through the lower hole of the dangle-down rubber bumper holder. Is that typical? I made my strap from a left-over tubular front mudguard stay. The way it fits through the dangle-down (hold your jokes), I doubt if a flat strap would have worked.

Richard L.
Plan on signing up for the world-wide 2017 DISTINGUISHED GENTLEMAN'S RIDE on September 30, 2018. Watch website at https://www.gentlemansride.com for details.

Offline muskrat

  • Global Moderator
  • Wise & Enlightened
  • **
  • Join Date: Jul 2009
  • Posts: 8021
  • Karma: 106
  • Lake Conjola NSW Oz
    • Shoalhaven Classic Motorcycle Club Inc
Re: 51 Plunger Tank Strap and other questions.
« Reply #8 on: 20.04. 2010 13:02 »
A friend omitted his strap on a trihard just to test ride around the block. Tank split, trihard burned.
Cheers
'51 A7 plunger, '57 A7SS now A10CR, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
Australia
Muskys Plunger A7

Offline brissy_bsa

  • Moving Up
  • **
  • Join Date: Jan 2007
  • Posts: 36
  • Karma: 0
  • A new 1951 A10 Golden Flash owner
Re: 51 Plunger Tank Strap and other questions.
« Reply #9 on: 21.04. 2010 01:20 »
Wow, Glad I brought this up. Um, does anyone have the correct part number? ian

Offline gold33

  • A's Best Friend
  • ***
  • Join Date: Feb 2009
  • Posts: 110
  • Karma: 1
Re: 51 Plunger Tank Strap and other questions.
« Reply #10 on: 21.04. 2010 01:33 »
Glad I saw this post!

Does anybody have a picture of a correct strap? are they flat bar or shaped to tension the seam at the bottom of the tank?
When I bought the bike it came with 5-6 powder coated strips of metal that I assumed were all different types of seat mounting plates.

After all the drama of the last 7 mths I'd hate to have the tank split...
Darren
'52 Plunger

Online Brian

  • Wise & Enlightened
  • *
  • Join Date: May 2007
  • Posts: 1699
  • Karma: 40
  • Mt Gambier, South Australia.
Re: 51 Plunger Tank Strap and other questions.
« Reply #11 on: 21.04. 2010 07:50 »
Just a flat piece of bar. You can make one out of any lump of metal you have lying around.

Offline a10gf

  • Wise & Enlightened
  • *
  • Join Date: Sep 2006
  • Posts: 2700
  • Karma: 42
  • West Coast, Norway & Alpes Maritimes, France
    • A10 GF
Re: 51 Plunger Tank Strap and other questions.
« Reply #12 on: 21.04. 2010 09:59 »
^^^ agree, just measure up the distance, and drill 2 holes. Was missing on my bike too (when bought it some 15 years ago), then read somewhere about tank split and quickly dug up some leftover metal strip and secured it.

A10 GF '53 My A10 website
"Success only gets you a ticket to a much more difficult task"

Offline beezalex

  • North Carolina, USA
  • Valued Contributor
  • ****
  • Join Date: Jan 2008
  • Posts: 374
  • Karma: 4
Re: 51 Plunger Tank Strap and other questions.
« Reply #13 on: 21.04. 2010 17:35 »
Plunger A10 Tank stiffening plate: 67-8085
Alex

Too many BSA's


Offline RichardL

  • Outside Chicago, IL
  • Wise & Enlightened
  • *
  • Join Date: Nov 2007
  • Posts: 4937
  • Karma: 46
Re: 51 Plunger Tank Strap and other questions.
« Reply #14 on: 21.04. 2010 17:38 »
Here are a couple of pictures of my approach. I am still curious if running the strap through the bumper holder is the correct or usual path. Does anyone know? In my case, the landings for the strap occur fairly high up with respect to the hole that the strap passes through. Therefore, the tubular strap works just right in avoiding the curvature of the through hole.

Richard L.
Plan on signing up for the world-wide 2017 DISTINGUISHED GENTLEMAN'S RIDE on September 30, 2018. Watch website at https://www.gentlemansride.com for details.