grandpaul wrote:This begs the question - WHY ARE NORTON OIL PUMPS SO BLOODY EXPENSIVE?

Because they are dual pumpers, both internal and external.

I don't know WHY Norton Oil Pumps are so spendy. I'd imagine it's economies of volume. Not much demand for them. They are certainly easy enough to make.
I also am not in favor of an inline valve. Mine will wet sump if left for much over a week. I alwyas just check the oil tank before leaving though anyway. So, it's not that big a deal for me.
All the specialty stuff...People will do what they want to make a bike theirs. They will use what ever products they see fit to make their riding experience what they want it to be. That's how it should be.
People that ignore those that have been there/ done that...well, what can ya say?
Things could be worse. We could all be riding H*nda's, Then what would we have to gripe about?

Seems to me an industrious fellow could earn a tidy income just making Norton oil pumps and selling them on the open market.

Tooling and reverse engineering costs cuold be recouped pretty quickly (my guess). The raw materials certainly don't give any indication of current finished product cost.

grandpaul wrote:Seems to me an industrious fellow could earn a tidy income just making Norton oil pumps and selling them on the open market.

Tooling and reverse engineering costs cuold be recouped pretty quickly (my guess). The raw materials certainly don't give any indication of current finished product cost.

Seems like it wouldn't be much of a leap for someone like Morgo, who's already making replacement pumps for Triumphs.

tuono wrote: Some Commandos must weigh about 600lbs with all the unnecessary junk on them that the 'specialists' say you need!

Like what?

sidreilley wrote:

grandpaul wrote:Seems to me an industrious fellow could earn a tidy income just making Norton oil pumps and selling them on the open market.

Tooling and reverse engineering costs cuold be recouped pretty quickly (my guess). The raw materials certainly don't give any indication of current finished product cost.

Seems like it wouldn't be much of a leap for someone like Morgo, who's already making replacement pumps for Triumphs.

From what I can gather, Morgo has passed on making Norton pumps as they are already gear-based unlike the plunger-types in the Triumphs and BSAs. With the trillions of words written about the Norton wetsumping you would think by now we'd have a definitive solutions aside from sticking a valve in the oil line.

I thought someone had already posted a link to an aftermarket oil pump in the last few weeks??? I remember looking it up, but it was expensive

grandpaul wrote:

ML wrote:Why fight the problem? The problem is the solution! Simply cut out the bottom of the motor and weld a one gallon sump onto it. Divert the oil feed to the sump and all will be well. Oh, and a side benefit is if any of the pesky frame gets in the way of the sump just cut that out too.

That sounds like a pretty good idea!
The sump could run from just aft of the front crossover tube, and splay out below the engine mounts, similar to several other brands' designs.
No need to cut any frame members, either; just keep the width narrow enough to fit between the frame tubes.
Maybe a perimiter-bolted bottom cover and integral fitment of a modified sump screen body that could affix the sump to the engine with it's heavy thread.
With careful design, you could even retain the centerstand; although it wouldn't work with 2-into-1 headers (sorry, Jean).

Time to burn some midnight oil on AutoCAD...

But it does work if you put the oil tank behind the transmission

Now take a look at the racer Jim Comstock built, the oil tank is below the engine.

This Old Velocette also has the oil tank below the engine and as an added benefit, out in the air flow.


Jean

grandpaul wrote:Seems to me an industrious fellow could earn a tidy income just making Norton oil pumps and selling them on the open market.

Tooling and reverse engineering costs cuold be recouped pretty quickly (my guess). The raw materials certainly don't give any indication of current finished product cost.

Jim Comstock maybe ?
look at the oil pump in this thread :
jim-how-about-them-there-timing-gears-t4679-15.html

Good spotting Ludwig all I saw was the timing gears when I read the thread.

RennieK wrote:Good spotting Ludwig all I saw was the timing gears when I read the thread.

Who's going to bug Jim to tell us more about his oil pump?

pelican wrote:http://www.srmclassicbikes.com/catalogue/index.php?target=products&product_id=780

oil-pump-and-wetsumping-t5566.html

Now let's see if we can find out more about this pump...

I've always figured the feed pump is pretty useless. I reckon the crankshaft centrifuges more oil. Why not make that the pump?

Mick