This Mikuni CV BST40 carburettor repair kit includes essential components such as the plunger vacuum diaphragm, designed to restore performance and reliability in KTM 640 LC4 models. Manufactured to precise specifications, it serves as a direct OEM replacement for worn or damaged carb parts.

Features

• Manufactured from high-tech materials for reliable performance


• Built to exacting standards for confident engine rebuilds


• Meets or exceeds OEM quality


• Direct OEM replacement


• Visual inspection of product image recommended before ordering


• Easy to install; professional installation recommended if uncertain

Cross-Reference OEM Part Numbers

• Throttle Valve: 58431035000


• Float 6.1 Gram Mikuni: 58431009000


• Diaphragm for Throttle Valve: 58431028000


• Needle Valve 2.8mm: 58431020000


• Gasket Set Mikuni BST40-225: 58431099000


• Idling Jet: 58431007047, 58431007045


• Additional References: 58431028000, 58431020000, 58431099000, 58431007047

Vehicle Fitments

• 1998 640 LC4 – Carburettor BST 40


• 1998 640 LC4-E/Mil – Carburettor BST 40


• 1999 640 LC4 – Carburettor BST 40


• 2000 400 SXC – Carburettor Mikuni BST 40


• 2000 640 Adventure R – Carburettor BST 40


• 2000 640 Duke – Carburettor BST 40


• 2000 640 LC4-E – Carburettor BST 40


• 2000 640 LS-E/Mil – Carburettor BST 40


• 2001 400 LC4-E – Carburettor BST 40


• 2001 640 Duke – Carburettor BST 40


• 2001 640 LC4 Adventure – Carburettor BST 40


• 2001 640 LC4-E – Carburettor BST 40


• 2001 640 LC4-E Supermoto – Carburettor BST 40


• 2002 640 Duke II – Carburettor Mikuni BST 40


• 2002 640 LC4 – Carburettor Mikuni BST 40


• 2002 640 LC4 Adventure – Carburettor Mikuni BST 40


• 2002 640 LC4 Supermoto – Carburettor Mikuni BST 40


• 2003 625 SXC – Carburettor Mikuni BST 40


• 2003 640 Duke – Carburettor Mikuni BST 40


• 2003 640 LC4 Adventure – Carburettor Mikuni BST 40


• 2003 640 LC4 Enduro – Carburettor Mikuni BST 40


• 2003 640 LC4 Supermoto – Carburettor Mikuni BST 40


• 2004 400 LS-E/Mil – Carburettor Mikuni BST 40


• 2004 640 Duke – Carburettor Mikuni BST 40


• 2004 640 LC4 Adventure – Carburettor Mikuni BST 40


• 2004 640 LC4 Enduro – Carburettor Mikuni BST 40


• 2004 640 LC4 Supermoto – Carburettor Mikuni BST 40


• 2005 640 Adventure – Carburettor Mikuni


• 2005 640 Duke – Carburettor Mikuni


• 2005 640 LC4 Enduro – Carburettor Mikuni


• 2005 640 LC4 Supermoto – Carburettor Mikuni


• 2006 640 Adventure – Carburettor Mikuni