Wiseco Bottom End Rebuild Kit - Yamaha YZ250 2-Stroke (2001-2002)

Complete Bottom End Rebuild Kit for YZ250 2-Stroke

Wiseco bottom end kit includes everything for a complete crankshaft rebuild: premium crankshaft, main bearings, and full gasket/seal kit. Quality you trust, performance you demand.

Why Wiseco Bottom End Kits

✓ Complete kit – everything you need
✓ Premium crankshaft included
✓ High-quality main bearings
✓ Full gasket and seal kit
✓ OEM quality or better
✓ Precision-balanced crankshaft
✓ Wiseco racing heritage

What's Included

✓ Wiseco crankshaft (precision-balanced)
✓ Premium main bearings
✓ Complete bottom end gasket kit
✓ All seals needed
✓ Transmission bearings (if applicable)

Does It Fit?

✅ **Yamaha YZ250 2-Stroke** (2001-2002)

Quick Specs

Part #: WPC127
Application: Bottom end rebuild
Type: Complete kit with crankshaft
Weight: 12.40 lbs

Complete Bottom End Solution

**Everything in One Box:**
- Wiseco crankshaft
- Main bearings (premium quality)
- Bottom end gasket kit
- All seals required

No hunting for parts—just one part number!

Wiseco Crankshaft Quality

**Precision-Balanced:**
- Factory-balanced for smooth operation
- Reduces vibration
- Extended engine life

**High-Quality Materials:**
- Forged construction
- Heat-treated components
- Built to racing standards

Premium Main Bearings

**High-Performance Bearings:**
- Superior quality vs. aftermarket
- Sealed for protection
- Long service life
- Smooth rotation

When to Rebuild Bottom End

Rebuild your bottom end if you have:
- Excessive crankshaft play
- Rough or notchy crank rotation
- Metal shavings in transmission oil
- High hours or mileage
- After major crash or seizure
- Preventive maintenance rebuild

Signs You Need Bottom End Work

⚙️ **Play:** Side-to-side movement in crankshaft
🔊 **Noise:** Grinding or rattling from bottom end
💧 **Metal in Oil:** Shavings in drain oil
🎯 **Rough Rotation:** Crank doesn't turn smoothly
⏰ **High Hours:** Time for preventive rebuild

Installation Notes

⚙️ Difficulty: Advanced
🔧 Tools: Engine stand, case splitter, torque wrench, special tools
🔧 Time: 8-12 hours (full rebuild)
👨🔧 Professional installation highly recommended

Pro Tip

💡 When doing a bottom end rebuild, also check/replace rod bearings, inspect transmission gears and shift forks, and replace the clutch if worn. Do it all at once for peace of mind.

What Else You'll Need

**For complete rebuild:**
- Piston kit (sold separately)
- Top end gasket kit (if doing top end too)
- Transmission oil
- Case splitter tool
- Assembly lube

Complete Engine Rebuild

**Bottom End (this kit):** Crankshaft, bearings, seals
**Top End (separate):** Piston, rings, cylinder work
**Clutch (separate):** Plates, springs, basket inspection

**Do both ends at once for total peace of mind!**

Why Bottom Ends Fail

**Normal Causes:**
- High hours / miles
- Normal wear over time
- Bearing fatigue

**Accelerated Failure:**
- Low oil level
- Dirty oil
- Overheating
- Seizure damage
- Crash damage

Wiseco Racing Heritage

Wiseco has been the choice of champions for decades. Their crankshafts and bottom end kits are built to the same specs as their race-winning components.

Questions?

📞 541-668-7503
📧 Support@dunegoonshop.info

Ships same day before 3pm EST ⚡
4 in stock - Ready to ship!