by thefrenchowl » Fri Apr 08, 2016 3:33 am
All early K, KR, KRTT, KRM have the same frame geometry, same assembly jig, but plus or minus a few items not put on or added for specific application.
At an unknown date, the KR/KRTT and KRM got their own steering casting, casting number ending in R, carrying forward the same geometry while the KH changed slightly.
In 1958, new KR/KRTT/XLRTT frame to cope with higher engine but same steering angle.
Stayed the same till the end in 1969.
2 different KR rigid rear ends, early short wheelbase, did not last long, then in 1954, longer wheel base.
So your frame could be any of the three... Plus the fact nothing was set in stone in the early days, so racers were indeed assembled with whatever was available on the shelves.
Quantities, not many in the early days, the KR only became popular with racers when it started winning consistently, that's 1954 onwards...
Still, you're probably stuck with using a horse shoe oil tank, so go special all the way!!!
Patrick