Pro Circuit SY88250-304 304 Factory Sound Silencer (Aluminum) drive-hubs it is a suitable upgrade

it is a suitable upgrade from BiMetal engine bearings

(W)-rated for speeds up to 168+ mph all comparisons made to Bridgestone S20 EVO ultra-high performance sport radial

you need to change the gram weight in your primary clutch flyweights

User-friendly instructions

Designed to mount on the hood of your sled with longer stems for more mirror adjustment and a cold weather rubber boot to protect adjustment joints from ice and snow

Pro Circuit SY88250-304 304 Factory Sound Silencer (Aluminum) drive-hubs it is a suitable upgradeMarketing Color: Aluminum Feature a longer midsection than the R 304 Shorty for stronger mid to high RPM performance. Excellent replacement for the OEM silencer, while offering impressive performance gains. 6061 T 6 brushed aluminum housing. Double walled mounting brackets. FIM approved, stainless steel tubing and end cap. Steel Allen head screws for easy rebuilding repacking. Exclusive E glass pillow packing. Vehicle Fitment: 1988 Yamaha YZ250