singring said:
Can anyone date this 1975 Interstate 850 engine?
serial number is 313425
Would this engine be included in the batch that suffer from the soft cam issue?
I think it would be almost impossible to say?
As batches of bikes were not always built in numerical seqence, and I'm not aware of any numbering information that would pinpoint a paricular bike as having a soft cam or not? I think it was just a matter of luck if any particular bike did have one and another didn't?
But not to worry, if your MkIII did have bad cam then it could have been replaced by now, unless it hasn't done many miles?
Also, this isn't likely to be a problem that will occur overnight, or leave you stranded by the side of the road. If you did happen to notice that the performance was slowly dropping off, then it would be wise to check if any of the valves had noticeably less lift than others?