is this an Ariel rocker box or a modified BSA? (in NZ)

[Rocket Racer]

http://www.trademe.co.nz/Browse/Listing.aspx?id=893332732

not mine, just happened across it

[bsa-bill]

I've seen one or two of those , always thought an owner mod y assist pushrod location, but hey could be Ariel right enough

[trevinoz]

Modified BSA. Ariel is different in shape and the covers are held with a single centre bolt.

[Rocket Racer]

good to know!

[Greybeard]

Looks like a useful modification. I assume an oil tank/primary case filler cap fits the hole.

[Billybream]

There's one listed on UK EBay at present, not really sure how much help modification would make, seems another source of potential leak.

[Rocket Racer]

might be all right on a plunger model as no head steady on top to interfere with but can't see it fitting a swingarm bike

[TT John]

I think that this is a Ariel Huntmaster rocker box, Ive been looking for one of these to put on my A 10 It makes it so much easier to get the rods in.
TTJohn

[Greybeard]

I think that this is a Ariel Huntmaster rocker box, Ive been looking for one of these to put on my A 10 It makes it so much easier to get the rods in.
TTJohn

The Huntmaster rocker box covers are held by a single central bolt. They do have the access hole in the top though so I think someone has thought to add that handy feature to an A10, (Plunger?) rocker box.

[TT John]

Greybeard.
Not sure about that one. I have just put a Huntmaster head on my A10 plunger and it has the normal five studs that hold it in place the same as the A10, so I have the A10 rocker box on the Huntmaster head, being the same shape as the A10 plunger head, with the short carb intake.

TTJohn

[Greybeard]

I was speaking of the tappet adjustment covers

[TT John]

Greybeard.

Okay, got you, I suppose they would be okay if you had those covers with the HM rocker box but the one advertised is a BSA with a modification, just to make it easy.

TTJohn