KTM 640 LC4 Mikuni BST40 slide

With under 20K miles (32,187 km) (claimed). Notice severe grooving. Not visible in this view are the drilled slide lift holes, which contribute to accelerated wear, and the worn jet needle hole.

new

end view of new and used LC4 slides

slide guide, used

slide guide, new

emulsion tubes, new and used

jet needles, new and used

New BST40 slides can be purchased here.

Applications list:
KTM 400 LC4-E '01
KTM 400 LS-E/mil '04-'05
KTM 400SXC '00
KTM 625SXC '03 (USA only)
KTM 640 Duke II '00-'07
KTM 640LC4 '98-'99 & '02
KTM 640LC4 Adventure R '99-'07
KTM 640LC4-E '00-'01
KTM 640LC4-E/mil '98
KTM 640LC4 Enduro '03-'05
KTM 640LC4 Supermoto '01-'05
KTM 640LS-E/mil '00