Parts list for 78 GS550 upgrade?

[Chuck78]

550's with k&n pods, after market exhaust, & rejetted are REALY FAST as is! I'm doing the 650 swap on a spare '77 550 engine I have though. Gearbox is bad on the 78 engine in the bike. Watcj powrshifting into second on those, a hard shift when you're not 100% shifted into second will damage the shift forks easier than the 5 speeds.

Do a 310mm single or 296mm dual disc rotor setup with gs500 / ninja 600 / ninja 250 twin pistin calipers. Look up Salty_monk's thread on twinpot conversion for tge skunk (his gs1000). Honda rotors & ninja calipers basically.

Get some Hagon 2810 rear shocks, sonic .90kg/mm fork springs or so (1.0 or 1.1 if you are heavier), mike's xs cartridge emulators, and Avon AM26 or Shinko 230 TourMaster tires instock sizes or no more than 1 larger than stock.

[Chuck78]

Oh and you must stick with the proper years of stator to match the rotor on the bike. The earlier ones have fewer poles, the later ones are like 11 poles.