Moturo cylinder kit complete for Yamaha Bear Tracker 250

Moturo complete cylinder kit for Yamaha Bear Tracker 250 99-04

The Moturo cylinder kit for Yamaha Bear Tracker 250 (model years 99-04, YFM 250 XM/XN/XP/XR/XS) — the complete replacement set for the required engine overhaul. 230 cc, 18 hp, ready to install.

The cylinder sits on the engine block and guides the piston through the combustion chamber and exhaust. Bore, stroke, and timing follow the factory specifications of the Yamaha YFM 250 in versions XM, XN, XP, XR, and XS (model years 1999 to 2004, 230 cc, 18 hp / 13 kW), with tightening torques according to the workshop manual.

Replacement takes several hours using an Allen key set, torque wrench, and a clean workbench. Engine work requires care when cross-tightening the cylinder head and studs, as well as when seating the piston rings in the correct order.

Cylinder kit for the Bear Tracker 250, made by Moturo.

Performance · Material · Numbers

• 230 cc displacement, 18 hp / 13 kW
• Bore and timing of the YFM 250 (XM, XN, XP, XR, XS)
• Complete set with piston, pin, rings, clips, and gaskets
• Tightening torques according to the YFM 250 workshop manual

Important notes – please read

Original replacement part design, no separate type approval (ABE) required. Replacement does not require registration. Check cylinder bore and piston dimensions before installation — if the connecting rod eye is heavily worn or the crankshaft is damaged, additional work on the engine bottom end is necessary.

Tools & time required

• Allen key set in common sizes
• Torque wrench
• Piston ring compressor
• About half a day for an experienced mechanic

Scope of delivery

1 × cylinder, 1 × piston, 1 × piston pin, 1 × piston ring set, piston clips, gasket set. Not included: tools, coolant, engine oil.

Frequently asked questions

Does the kit also fit the Yamaha Timberwolf 250?
Yes, the Timberwolf 250 (YFM 250) shares the engine with the Bear Tracker 250 — bore and timing are identical.

Do I need a TÜV registration?
No. Original replacement part design, no separate type approval required.

Are crankshaft bearings and connecting rod included in the scope of delivery?
No, this kit covers the upper engine block. Bearings, connecting rod, and crankshaft remain untouched and must be checked separately.