I tried Corby but they came back no longer available so, unless one turns up on ebay, I'll have to get something made. I've done some checking and the 81/82 KL engine is identical to the KLX with the possible exception of the cam. The parts fiches have the wrong graphics for the cam but that isn't the only mistake/omission. I got a late KL engine with 900 miles on the clock [been used by a shepherd] and later the KLX lense protector and rubber band [for twice the oem price] with a spare headlight lense. The latter bits were 1/3 the price of the engine. Ho hum. I also got one s/h side panel from the usa to match the other unbroken one that I had. One thing I can't tell is if the Roller bearing KLX cam differed from the KL roller as there are no parts fiches for the C model on the net. In fact, short of this website, no mention at all.