Forum
Northern New England Norton Owners
Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: Dan's commando-roadster oil tank-repair

Dan's commando-roadster oil tank-repair 23 Jan 2018 10:20 #1

  • dynodave
  • dynodave's Avatar Topic Author
  • Offline
  • Moderator
  • Moderator
  • dynodave
  • Posts: 429
  • Thank you received: 261
The first oil tank was used on the "commando" and later the "R" which was later named the fastback tank.
The second oil tank started with the "S" and "roadster", it is named "S" or "central"

There are at least 3 variants of roadster tank.
A. early one is late 1970 is 06-1140 and
1.It has NO chain oiler tap off on the scavenge return line..
2. The breather connection tube on the baffle tower is slightly larger diameter than the later ones.
B. later tanks are:
71,72, 06-3090
73 06-3095
74 06-3975
75 06-3456
With casual inspection only, The only difference I could find, which was on dan's tank is the return scavenge line is shorter AND closer conforming to the tank. pix to follow..

In Dan's tank and in my stock of tanks many of them had the rear bracket broken off.
I'm assuming these are broken due to the tanks resonant vibration which I have seen and noted as a huge potential problem. Very often the soft little iso mounts are broken, especially the rear one.
Out of 9 tanks only one tank had the front bracket broken off.

I will be repairing them with new tabs welded on the tank.
Next
I will be installing new stiffer rubbers to raise the resonant frequency of the oil tank and it's mass to a higher frequency that hopefully might even put an end to breakage.

All these properties will later be checked for accuracy and edited if necessary.
The following user(s) said Thank You: mikethgreek, jim winning, a1avette, GONZO

Please Log in to join the conversation.

Dan's commando-roadster oil tank-repair 19 Apr 2018 21:55 #2

  • DJB
  • DJB's Avatar
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 24
  • Thank you received: 4
Dave,
Thank you the new tab looks great I appreciate your help.

Dan

Please Log in to join the conversation.

Dan's commando-roadster oil tank-repair 20 Aug 2018 13:58 #3

  • dynodave
  • dynodave's Avatar Topic Author
  • Offline
  • Moderator
  • Moderator
  • dynodave
  • Posts: 429
  • Thank you received: 261
Follow up discussion with Mark at british cycle supply about roadster tanks is that besides them being outrageously expensive new at Andover Norton, is they have eliminated the bottom bobbin and gone with the flat plate.Not sure if they are selling part number 06.3456 or 06.3975 @ 265.00GBP or $390

Mark was pressing me for a price to repair, apparently for a pile of tanks he has and could sell if made good.
The following user(s) said Thank You: a1avette

Please Log in to join the conversation.

Dan's commando-roadster oil tank-repair 02 Sep 2018 19:29 #4

  • a1avette
  • a1avette's Avatar
  • Offline
  • New Member
  • New Member
  • 9786602599
  • Posts: 6
  • Thank you received: 2
Colorado Norton Works also reworks oil tanks for about $170. Looks like an off season task if you can wait as they say they do them in batches. I haven't heard a bad word about them yet.

Please Log in to join the conversation.

  • Page:
  • 1
Time to create page: 0.068 seconds