17 TUNING THE ENGINE 109B00056-11– Remove cap , adjusting spring , auxiliary spring , and springinsert from the clutch cover.– Pull both springs off of the spring insert.E00373-10– Mount the required auxiliary spring ( p. 108) and adjusting spring and position them together in the clutch cover.(125 XC‑W EU)Auxiliary spring with yellow marking (54637072300)Auxiliary spring with green marking (54837072100)Auxiliary spring with blue color coding (54637072500)(150 XC‑W US)Auxiliary spring without color coding (50437069050)Auxiliary spring with yellow marking (54637072300)The recess in spring insert engages in the angle lever.InfoScrew must not be turned as this would worsen the engine charac-teristic.– Check the O-ring in the cap.– Position the cap.– Mount and tighten the screws.GuidelineScrew, exhaust control cover(125 XC‑W EU)M5 6 Nm (4.4 lbf ft)Screw, exhaust control cover(150 XC‑W US)M5 6 Nm (4.4 lbf ft)E00364-10(All 250/300 models)– Remove screws .B00056-11– Remove cap , adjusting spring , auxiliary spring , and springinsert from the clutch cover.– Pull both springs off of the spring insert.