CSK SPRING KITS 1999-ducati-monster-900-esi1918463 There are two possible regulators

There are two possible regulators for the Scrambler 400 1999 model

SEALS KIT (1 OIL-1 DUST) DUAL COMPOUND WP 43 MM

providing great performance and optimum visual fitment

The regular RZR (non-“S”) stock clutching is a good calibration for stock tires

Genuine Mikuni needle and seat assemblies provide reliable performance

CSK SPRING KITS 1999-ducati-monster-900-esi1918463 There are two possible regulatorsCoil springs These are spiral wound springs using four to eight pieces per set, made from heat treated high carbon steel and come in various shapes and sizes, delivering differing spring tensions depending on the size of the bike and the horsepower of your engine. It is important to note that you cannot change the basic shape of these springs to gain any performance advantage but what you CAN do is buy an EBC Brakes CSK kit which has slightly thicker