Yamaha Blaster Engine Services & Pricing
Ken OConnor Racing provides professional Yamaha Blaster engine rebuilding, cylinder boring, crankshaft rebuilding and performance machining. All machining and engine assembly are performed in-house at our Connecticut engine machine shop.
Whether you need a dependable stock rebuild, individual machine work or a complete performance engine, KOR can prepare your Yamaha Blaster engine for trail riding, competition or racing.
Complete Yamaha Blaster Engine Builds
| Service | Description | Price |
|---|---|---|
| Basic Yamaha Blaster Engine Rebuild | Complete engine rebuild with professional machine work, premium replacement parts, refinishing, assembly and final leak-down testing. | $1,400 |
| Custom Performance Engine Build | Complete engine build configured for trail riding, aggressive performance or racing. | Contact for quote |
The Basic Engine Rebuild Includes
- Cylinder boring and honing
- Wossner forged piston kit
- Crankshaft rebuilding
- New main bearings
- New balance-shaft bearings
- New snap rings and lock washers
- Complete gasket and seal replacement
- New socket-head engine hardware
- Glass-beaded engine cases
- Freshly painted clutch cover, cylinder and cylinder head
- Complete engine assembly
- Final leak-down testing
Yamaha Blaster Cylinder Machining
| Service | Description | Price |
|---|---|---|
| Cylinder Boring and Honing | Precision-bore and finish-hone a Yamaha Blaster cylinder with torque plate for the correctly sized replacement piston. | $100 |
| Cut Cylinder Base | Machines the bottom of the cylinder to correct cylinder height, port timing, damage or engine geometry. | $65 |
| Cut Top of Cylinder | Machines the cylinder’s top gasket surface to correct cylinder height, deck clearance, damage or engine geometry. | $65 |
| Trail Porting | Improves low- and midrange power while maintaining smooth, dependable trail performance. | $225 |
| Aggressive Trail Porting | Produces stronger midrange and top-end power for modified recreational engines. | $300 |
| Race Porting | Port timing and flow developed for high-performance and racing applications. | $300 |
Crankshaft and Bottom-End Services
| Service | Description | Price |
|---|---|---|
| Crankshaft Rebuild With Parts | Rebuilds and professionally trues the Yamaha Blaster crankshaft using the required replacement components. | $230 |
| Crankshaft Rebuild—Labor Only | Presses apart, assembles and professionally trues the crankshaft using customer-supplied parts. | $150 |
| Crankshaft Welding | Welds the crank pins to prevent movement in high-performance applications. | $80 |
| Balance-Shaft Lightening | Reduces the rotating weight of the balance shaft for improved engine response. | $65 |
| Case Trenching | Machines the crankcases to provide clearance for compatible stroker crankshafts and engine combinations. | $130 |
| Case Matching | Matches the crankcase transfer passages to the cylinder for improved airflow. | $75 |
Cylinder Head and Performance Services
| Service | Description | Price |
|---|---|---|
| Cylinder Head Rechambering | Corrects the combustion chamber and squish geometry for the engine combination. | $85 |
| Flywheel Lightening | Reduces rotating mass for quicker engine response and acceleration. | $85 |
Engine Case and Repair Services
| Service | Description | Price |
|---|---|---|
| Broken Bolt Removal | Removes a broken fastener from an engine component and restores the original threaded hole when possible. | Starting at $35 |
| Cracked Case Welding and Machining | Welds and machines a damaged Yamaha Blaster engine case to restore the affected area. | Starting at $150 |
| Engine Case Glass Beading | Cleans and restores the appearance of aluminum engine cases. | $150 |
| Individual-Part Glass Beading | Cleans eligible aluminum engine components removed from the engine. | $150 per hour |
| R and R 8 engine bearings | Removal and installation of the main, balance shaft and transmission bearings in clean cases. | $75 |
Why Choose Ken OConnor Racing?
Ken OConnor Racing is a full-service engine machine shop with extensive experience rebuilding and machining Yamaha YFS200 Blaster engines. Work is performed in-house, allowing us to maintain control over machining accuracy, engine preparation, assembly and final testing.
Customers can choose individual machine services or have KOR complete the entire engine from disassembly through final leak-down testing.
Important Pricing Information
Prices shown are starting prices and may change based on engine condition, required replacement parts and the extent of the repair. Damaged cases, stripped threads, broken fasteners, corrosion and previously modified components may require additional labor.
Customer-supplied crankshaft components must be inspected and approved before assembly. Additional repairs or replacement parts will not be used without customer authorization.
Please contact Ken OConnor Racing before shipping an engine.