1000cc road racer rebuild

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Just got this message from Gordon Humpherys - the tuner for Dave Watsons race bike in the photo below (with Gary Thwaites riding).

"Hi Jim, Just a short message to say I stripped Dave Watson's Motor, every thing is in perfect condition, no wear on camshaft, cam-followers, pistons, gudgeon pins or bore, so going to build it back up as is and hope for another good season of racing. Regards Gordon"

Usually its hard to keep an all out Norton together through a season of racing. And big bore Nortons can shake themselves to death. But the lighter pistons not only helped keep the bike together - it finished & won every race, and took the championship.

1000cc road racer rebuild


The bike uses a JS stage 3 cam and lightweight radiused lifters as shown below. Maney bottom end. It beats 4 cylinder vintage bikes and 8 valve Weslakes.

1000cc road racer rebuild


The lightweight pistons

1000cc road racer rebuild


The longer bushless rods for DLC pins (less reciprocating weight)

1000cc road racer rebuild
 
Looking good, Jim. If it can live through someone racing it as hard as Gary does for a season, it can live through anything.

Ken
 
Just in case someone wants to hear what one of these bad boys sounds like.

This one runs the Jim Schmidt pistons and rods, a Megacycle +D grind and Kehien FCR carbs.

[video]http://www.youtube.com/watch?v=3IWFVyQm29I[/video]

I still cannot get over how fast this thing winds up and sounds like a smaller displacement bike. I did a few pulls on it and it is smooth.
 
+1 for posting the info and photos. And of course for going the distance and turning out these great products for our bikes. Cj
 
Matt Spencer said:
Very Good .

At the risk of asking you to repeat yourself, Is he letting on what the Cylinder Head set up is ? Valve sizes ? :)

Maney stage 3 head with 5mm oversize intake valves and 3mm oversize exhaust valves
 
A nice street 850 with a blend of JS engineering and Maney parts with about 85hp would be just the ticket around sunny Medellin
Al
 
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