These will work with the 86-89 Honda TRX 250R ATV, will also work with the 85-86 Honda ATC 250R with a Reed Spacer Plate. HONDA TRX 250R MOTO TASSINARI VFORCE DELTA 3 REED VALVE SYSTEM Vforce Carbon Fiber Reeds with Reed Gaskets.
Have ran Vforce reeds in all of my 2 stroke bikes. Throttle response is right there, also helping out on the low end. Highly recommend Vforce 3 reeds for the ATC/trx 250rs. These reeds (manufacturing #V305b) reeds will fit all years ATC 250r and all year trx 250r.