The well travelled Norton. UK-USA-BRD-NZ

Blaise - I had forgotten this nugget from Mr. Comstock re. the 312a, and how it relates to our new found ability to spin the motor right up vs. how the "old" cam felt.

comnoz said:
The 12a still idles happily and runs well but it will reduce the torque below 4500 and add some above that. Performance springs are needed. It needs extra compression and a tuned exhaust to work best. Valve to valve clearance needs to be watched. Often times you will need to sink the exhaust valve for clearance. It makes a great short track roadrace cam also. It is strongest from about 5 to 7000. Jim
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This is exactly how my new motor feels now well after break in. Not quite the same old torque from the stoplight (although am hoping the new exhaust from Mike helps that once I get the carbs bedded in with it), but when I get up past halfway on rev's, man does it go!

It kinda does make me want a 5-speed to go with my long black...
 
gortnipper said:
It kinda does make me want a 5-speed to go with my long black...
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don't go planting any ideas in my head,
Truth be told it has been keeping me up at nights thinking (dreaming) about Quaife 5 Speeds .8)
Looking forward to a trip down to the south island when i get back from holidays.
will sort out the run in miles in one trip .
 
blaisestation said:
don't go planting any ideas in my head,
Truth be told it has been keeping me up at nights thinking (dreaming) about Quaife 5 Speeds .8)
Looking forward to a trip down to the south island when i get back from holidays.
will sort out the run in miles in one trip .
Click to expand...
Support local. Buy TTI. (But note how NOT to order from @Fast Eddie ;-)

You're in AKL right? Ping me when you get back and we can go for a run.
 

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