DT125X Brake Master Cylinder Repair Kit Rear YZ801977-2001 This is the screw that

This is the screw that is used to set the idle or tick-over speed

Threaded preload adjustment

Now no longer available from Yamaha and exclusive to Yambits

RZ350L  1984

These carburettor top boots are supplied as a pair and suit:

DT125X Brake Master Cylinder Repair Kit Rear YZ801977-2001 This is the screw thatThis REAR master cylinder repair kit contains the piston, pushrod, seals, dust boot and spring. As with all brake components it must by fitted in accordance with the bike manufacturer's instructions and tested before use. Suits: DT125X 2005 2006 Warning Due to the safety critical nature of this item it cannot be returned if opened. Check it is the correct size before opening!