Same as the 300cc post. Please suggest and chime in.
bhp = claimed by factory
rwhp = rear-wheel hp, dyno by a random trade mag
Red = current model bikes.
500SS = North American, general retail sales, street-legal bikes
72-75 Kawasaki S1 Mach I = 249\2stroke\3-cyl = 32bhp
72-74 Kawasaki S2 Mach II = 350\2stroke\3-cyl = ?bhp
76-77 Kawasaki KH250 = 249\2stroke\3-cyl = ?bhp
87-09 Kawasaki Ninja EX500R = 498\twin = 45-50rwhp
2018+ kawasaki Ninja N400 = 399\twin = 43rwhp
76-79 Yamaha RD400 = 399\2stroke\twin =
88-91 Yamaha FZR400 = 399\4-cyl = 59bhp
2013+ Yamaha R3 = 321\twin = 36rwhp
Electric Bikes under 125 Volts:
89-09 Honda CB1 = 399\4cyl = 55bhp
2013+ Honda CBR500R = 471\twin = 46-49bhp
2013+ KTM RC390 = 373\twin = 43bhp
2018+ BMW G310 = 313\single = 29-31rwhp
89-09 Suzuki GS500/F = 487\twin = 40rwhp
2007-200? Aprilia SXV450 = twin = 60bhp
500-SBK = World bikes, general retail sales, street-legal bikes
86-95 Yamaha TZR250 250\2stroke\twin = 45bhp
86-94 Yamaha FZR400 = 399\4-cyl = 59bhp
83-95 Yamaha RZ350 347cc\2stroke\twin = ?bhp
88-98 Suzuki RGV250 = 249\2stroke\vtwin = 58-70bhp
87-90 Suzuki GSXR250 = 4cyl = 45bhp
84-92 Suzuki GSX-R 400 = 398\4cyl =
04-13 Suzuki GS500F = 487\twin = 40rwhp
88-89 Honda CBR250R = 249\4-cyl = 45bhp
87-99 Honda NSR250 = 249\2stroke\vtwin = 45-70bhp
83-94 Honda CBR400R/RR = 399\4cyl =
86-88 Honda VFR400R = 399\v4cyl = 58bhp
94-96 Honda RVF400R = 400\v4cyl = 59bhp
90 Honda NT400 (Bros) = 398\vtwin = (small Hawk GT)
2013+ Honda CBR400R = 399\twin = 46bhp
125GP bikes fit here. No current bikes, but probably 40RWHP ish...
"A. Frame and engine cases must be from a production, street use motorcycle, except for single cylinder motorcycles, which may use any frame or engine."
And single cylinder Moto3 four strokes. Current production available.