[AgentX]

Anyone happen to know the threading in the case for the rocker feed line? (in this instance, a 2002 500cc US-market Bullet)

Don't have access to check the engine right now.  Thanks!

[Arizoni]

I thought the oil returned thru the pushrod tunnels?
Are you asking about the thread size for the banjo fittings?

[AgentX]

I thought the oil returned thru the pushrod tunnels?
Are you asking about the thread size for the banjo fittings?

Sorry, meant "rocker feed line."  Was early here and I had not had coffee...will edit.  Looking for how it threads into the case.  Or is it fit some other way than threading?

And unfortunately, I'm not sure which of the two size banjos used on various years my head has, but if anyone has the spec for one or both, that'd be useful too.

MD

[ace.cafe]

I never had to tap any of them, but I think that the small one is 8mm and the larger one is 10mm. I don't know the thread pitch, but with a 2002 it is likely going to be metric.
Best way is to take the banjo to the hardware store and see what size nut threads on to it.

[ERC]

I think 2002 is British. ERC

[AgentX]

I never had to tap any of them, but I think that the small one is 8mm and the larger one is 10mm. I don't know the thread pitch, but with a 2002 it is likely going to be metric.
Best way is to take the banjo to the hardware store and see what size nut threads on to it.

Got thread checkers here in the garage...just need my new Fireball head back!    Know anyone who can help with that?

[ace.cafe]

Got thread checkers here in the garage...just need my new Fireball head back!    Know anyone who can help with that?

I'll see if I can get Mondello's to find out the size on your head.

[ERC]

If your talking about the banjo bolts for the oil line, the metric ones are 8mm x 1.00. The British ones are 5/16 x 26. I think 2002 was close to a change over year from British to Metric. The threads are almost identical to look at.  ERC

[AgentX]

If your talking about the banjo bolts for the oil line, the metric ones are 8mm x 1.00. The British ones are 5/16 x 26. I think 2002 was close to a change over year from British to Metric. The threads are almost identical to look at.  ERC

Thanks!  Also interested in the junction between the case and the rocker feed line, if anyone happens to know how that works.  Assumed it was threaded somehow too, but I could be way off...

Wish I could just go mess with the bike and see, but the bike's out of my hands at the moment.

Edit:  Ah, right.  So the case is male-threaded for the oil pipe nut to screw down on.  That's what I thought.  But does anyone know...what's that thread?

http://bulletwala.com/genuine-royal-enfield-rocker-oil-feed-pipe-set-brand-new-part-no-144594.html#

[ace.cafe]

Thanks!  Also interested in the junction between the case and the rocker feed line, if anyone happens to know how that works.  Assumed it was threaded somehow too, but I could be way off...

Wish I could just go mess with the bike and see, but the bike's out of my hands at the moment.

Edit:  Ah, right.  So the case is male-threaded for the oil pipe nut to screw down on.  That's what I thought.  But does anyone know...what's that thread?

http://bulletwala.com/genuine-royal-enfield-rocker-oil-feed-pipe-set-brand-new-part-no-144594.html#

That must be for a 350. I have never seen any 500 case with a fitting like that.
All the 500 KS and ES cases that I have seen are female threaded into the case, and probably something like the 5/16" or 8mm size.
In fact, I have never seen any oil line like that, ever.

[ERC]

If you go on Hitchcocks you'll see them for the 350s and early 500s. Looks like the same thing.  ERC

[AgentX]

That must be for a 350. I have never seen any 500 case with a fitting like that.
All the 500 KS and ES cases that I have seen are female threaded into the case, and probably something like the 5/16" or 8mm size.
In fact, I have never seen any oil line like that, ever.

Wow.  Thanks for the info!  That's how my 1977 350 is, now that I see the pic and recall.

I'll have Chumma check it out on my cases when he's back in the States...

[Tarnand]

This winter I am planning on replacing the existing ES rocker oil feed line with the one used in the KS models.  The way I see it I am going to drill the hole and tap it from the top of engine case just above the existing port that I am going to plug.  Has anyone done such modification?  What thread I should use for tapping that hole and other related info that I may be not yet aware of?

Thank you.

[Ice]

 If it were me I'd tap the top hole with the same threads as in the bottom hole or if the threads of a KS were different then I'd tap it as such.

[Adrian II]

Edit:  Ah, right.  So the case is male-threaded for the oil pipe nut to screw down on.  That's what I thought.  But does anyone know...what's that thread?

The case is drilled and tapped female for a male/male union. Pre metric it would have 5/16" BSC 26 TPI on the crankcase side as previously stated (not sure about later models), the end onto which the oil pipe nut screws can be 1/8" BSP (British Standard Pipe) thread, but I have also had one with the 19 TPI thread which also appears on the fuel pipe union nuts used with some British bikes' gas taps.

A.