Upright

D

dave s

Joined
Sep 30, 2018
Messages
3
Country flag
Building a 750 commando engine for a wasp chassis which will be sitting upright do I or should I do any oil mods to the crankcases or leave alone many thanks dave
 
If it's a 750 with the large sump filter plug then leave it alone, as it's the same as an Atlas more or less. The drillings through the timing chest are slightly different, but not important. If it's the type without, then it should be modified to rear oil pick up as documented on this site somewhere. Maybe LAB will help.
 
If the cylinders are now upright should the tappets be turned around so the drain channels are not facing forward ?
 
Richard Tool said:
If the cylinders are now upright should the tappets be turned around so the drain channels are not facing forward ?
Click to expand...
The oil channels in my stock tappets in my P11 upright engine faced forward. Cam rotates counterclockwise. Oil should still run down the front so the cam might pick up some oil for the tappet when the big cam bump comes up rather that throw it off the back. That said I'm not poster child for doing anything the right way on a Norton.
 
Wasp scrambles outfits were around in the early '70s. In Victoria, John Armstrong had one with an 850 motor. I am fairly certain I would have known if the internal oilways of the motor needed to be modified. Those outfits were not used for road racing, they were used on rough terrain. Oil would have been going in all directions inside the motor. It might be different if the machine was being used for touring on highways.
I don't know what variations of Wasp were used in the UK - some might have been road raced,
 
acotrel said:
Wasp scrambles outfits were around in the early '70s. In Victoria, John Armstrong had one with an 850 motor. I am fairly certain I would have known if the internal oilways of the motor needed to be modified. Those outfits were not used for road racing, they were used on rough terrain. Oil would have been going in all directions inside the motor. It might be different if the machine was being used for touring on highways.
I don't know what variations of Wasp were used in the UK - some might have been road raced,
Click to expand...
The Wasp Mkxx frames I found with Google are similar to the P11 frame, but look lighter weight. I guess some have the oil in frame feature. Can't tell from the small pics myself.
 
baz said:
Have you found this beneficial to camshaft life?
I seem to remember when commoz tried this it made no difference
But I really can't remember now
Click to expand...
The brother of my boss at the Norton shop did such a fabrication in an attempt to forestall flattened cams on MKIIIs before it was understood to be a metallurgy problem. It was inconclusive as I recall. On the MKIII cases the factory had eliminated a cast-in shelf under the cam and he believed that was the reason for the failed cams. I suffered two cam failures on my MKIII before installing a known-good, work hardened cam that has lasted decades now.
 
Thomasa said:
The brother of my boss at the Norton shop did such a fabrication in an attempt to forestall flattened cams on MKIIIs before it was understood to be a metallurgy problem. It was inconclusive as I recall. On the MKIII cases the factory had eliminated a cast-in shelf under the cam and he believed that was the reason for the failed cams. I suffered two cam failures on my MKIII before installing a known-good, work hardened cam that has lasted decades now.
Click to expand...
Yep I guess Norton deleted it because of the extra machining
I know the early dommies had it , I don't think the atlas did?
 
I would have thought steel quality would a bigger problem with Japanese and Chinese motors. The main alloying elements besides carbon and manganese are chromium, molybdenum and nickel. Getting the latter 3 elements right, I would have thought would be more difficult in Asia. Although their metallurgy is probably American.
 
baz said:
Yep I guess Norton deleted it because of the extra machining
I know the early dommies had it , I don't think the atlas did?
Click to expand...
My P11 cases have a minimal radiused shelf all the way across under the cam. Enough of a trough to collect some oil for the max lift radius on the cam lobes to pick up some oil. The cam tunnel for lack of a better word had to be bored to a larger diameter for clearance for the 2S cam I put in the P11 cases last century.

Here's a pic I took during a tear down that shows the timing side case half. Youz guyz can decide if it qualifies as a mini oil shelf.
Upright
 
acotrel said:
I would have thought steel quality would a bigger problem with Japanese and Chinese motors. The main alloying elements besides carbon and manganese are chromium, molybdenum and nickel. Getting the latter 3 elements right, I would have thought would be more difficult in Asia. Although their metallurgy is probably American.
Click to expand...
Please enlighten me as to why you believe that countries with huge industry bases like China and huge technology background like Japan, cannot make decent steel ??
 
Fast Eddie said:
Please enlighten me as to why you believe that countries with huge industry bases like China and huge technology background like Japan, cannot make decent steel ??
Click to expand...
Probably for the same reasons that we thought that Japan couldn’t build good aircraft in the early days of WW II when in fact they were, at least for a while , the best in the world . Stupid prejudice that cost the Allies dearly.
 
YING said:
I .. thought that the factory should have done something along that way..
Click to expand...
I believe the first Norton twin, the 500 Dominator had a cast-in oil bath.
Maybe it is of little benefit under normal operation, and it won't save a soft cam, but when the bike has been standing still for a prolonged time, you know the lobes and cam followers are lubed as soon as the engine is kicked over.
 

Similar threads

Flatspot
What order do you do for a rebuild?
Replies
13
Views
316
Flatspot
Flatspot
Q
Fuel treatment product use
2
Replies
25
Views
933
seattle##gs
S
Q
Oil change/return question
Replies
7
Views
282
quawk
Q
S
New Breather on 1972 Combat
Replies
11
Views
501
ilikevelos
I
J
Lights on fine, but turned off the fuse blows
2
Replies
36
Views
958
concours
concours
Back
Top