by Elden Carl
Copyright © 2006 Top Gun Motorcycles. All rights reserved. Distribution or publication of this document (electronic or otherwise)
is prohibited without the express written consent of the author. For more information or to request permission to publish this
document, please see our contact page. For information on our pledge to maintain your privacy click here. To learn more about
your friends at Top Gun Motorcycles, read about us here.
Rod Morris – Gently Blown A-13 Transmission
In a previous article we reported a blown 4-dog gear on the main shaft of Rod’s KL-A13.
He was about to transport the transmission, crankcases and a piece of aluminum
knocked out of the crankcase, for inspection.
All internal parts and the crankcases including the bearings were carefully examined.
Fortunately the crank and gear box were OK except for the two gears damaged in the
blow up. The recommendation was that the transmission parts be replaced and the
chunk of aluminum be welded back into its place in the crankcase behind the crankshaft.
After repairing the gear box, truing the crank and removing scratches where found, the
parts were returned to Rod for transport to the welder (Kevin) made the repair with ple
nty of penetration and fill in the re-welded area.
Once back at Area 51 ½, Ed Runnels carefully ground off extra weld material so the
crank wouldn’t contact the repair area as it makes it’s billions, make that trillions of 360
degree revolutions inside the engine.
Once Ed had finished reassembling the bottom end, complete with the Vey rebuilt main
shaft and trued and cleaned up crankshaft, he reinstalled it into Rod’s rolling chassis.
Using the rolling chassis and frame as on engine stand, Ed set the Handy Lift at the
correct level and installed the MMP/CP forged stock bore/stock compression piston
followed by the L.A. Sleeved, bored and honed cylinder.
Finally Ed installed the head which had received one of Vey’s signature porting and
Once Ed finished the engine assembly work and did the valve adjustment, on went the
carb, sub-frame and other parts that make start-up possible. The bike started on the
third crank and ran perfectly.
As I write this, Rod has completed break-in on both of his custom rebuilt MMP/Top gun
KL650-A’s engines. To say Mr. Morris is happy with the results is an understatement. I’ll
report the details shortly.