150pc Specbolt KTM SX EX EXC 2 or 4 Strokes Bolt Kit Maintenance MX Dirtbike OEM Spec Fastener 2 STROKES: 50 60 65 85 105 125 250 300 360 380 550 AND 4 STROKES: 250 350 400 450 500 520 525 530 620 640