the older frames with the loop arm suspension will accept both the carbed & the injected engines. However, the older frame would need modifying if putting in an injection system (620ie) - on some of the minor crossbars (I had to do this to mine) By the way lads, check out the condition of the rose joints of the loop arm - where they attach to the swing arm, as these have caused a few probs when owners have not maintained them - as they start to creak & then sheer off. If in any doubt, replace them. Alan |