Hi folks, new to the forum thing. Live in Princeton B.C. Have had a 78 F3 for 2 years. Its now in storage in Austin, Texas. I had too good a time in Mexico and had to fly home after 9600 km trip. Back to work. Bike ran well. Only new battery, tube in rear and a new chain(hard to find the 630 88)Finally found one in Del Rio , Tx. Next joy is riding it back in September. Am confused about the differences between F's and K's(now that doesn't look good eh?) and also between F1's ,F2's and F3's other that the years they were manufactured. Anyone out there care to have a go at it ?