Just looking for some parts and happened to come across this on the MA site.
Table of Machines - 1st January 1970 to 31st December 1974
CLASSIC MOTOCROSS
165
Ducati RT 450
Gemini 175 trail
Greeves All models
Honda CR125M, CR250M, XL250 K0, XL350 K0,K1, all SL100, all
SL125, all SL350, all XL100 K0, MT250.
Hodaka All 100 & 125 models
Husqvarna Up to & incl. Magnesium engine reed valve 250 & others. Pre
Mikkola replica - no radial finned engines.
Harley Davidson All SX125, SX250, SX175 trail
Indian All
Jawa ISDE 250, 402
Kawasaki KX125 74, KX250 74, KX450 74, F11M, F12M, F81M
KTM Up to & incl. 74GS & MC125, 175, 250. Check date stamp on
So does that make a 250K1 a non-starter for pre 75?