961 Crank

BritTwit

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Good question.
I know the 961 cranks are pressed together, but I have never heard that the pins were welded.
With just 80 HP, I wouldn't think that they need to be welded.
 
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Tough to know if the new ones are. Here is a crank from a 2013 961 Engine taken this morning. Really hard to tell. Hopefully Simon can chime in to confirm if the new ones are and what year did this happen. 2011 maybe??

 

Fast Eddie

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That's a nice looking assembly.

It makes me wonder, has anyone ever considered converting one to a 360 degree crank? It would sound like a proper Norton then!
 

BritTwit

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Before Dreer decided to introduce the 961 with a 270 degree crank, all of his prototypes were 360 degree units.
Norton UK must have all of Dreer's prototypes, and original engineering data.
Maybe the new 650 twin that Norton intend to build will be a classic 360 unit.
 
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Hello Richard-7 , Can you help explain how the 961 engine oiling works in the engine. I mean once the oil leaves the oil pump it runs through galleries and how is it introduced to the crankshaft and rods ? Also it seems to me the hollow push rods carry the oil to the top end after they pressurize the lifters . The camshaft seems to be in a cavity all alone , there must be drain back channels somewhere ? I would like to have a few hours with that spare engine of yours to help explain how this engine is oiled . How much of the oiling is just plain old fashioned splash ? The service manual really has no explanation of this. Thanks for your help. Tony
 
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BritTwit said:
Before Dreer decided to introduce the 961 with a 270 degree crank, all of his prototypes were 360 degree units.
Norton UK must have all of Dreer's prototypes, and original engineering data.
Maybe the new 650 twin that Norton intend to build will be a classic 360 unit.
They don't have all of the prototypes...
 
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TonyA said:
Hello Richard-7 , Can you help explain how the 961 engine oiling works in the engine. I mean once the oil leaves the oil pump it runs through galleries and how is it introduced to the crankshaft and rods ? Also it seems to me the hollow push rods carry the oil to the top end after they pressurize the lifters . The camshaft seems to be in a cavity all alone , there must be drain back channels somewhere ? I would like to have a few hours with that spare engine of yours to help explain how this engine is oiled . How much of the oiling is just plain old fashioned splash ? The service manual really has no explanation of this. Thanks for your help. Tony

I personally haven't studied it yet, but I know my dad has. I may be able to get him to write something up for me but I would think Simon is already on here and would be able to write to it with reasoning behind it.
 
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