Description
Vito’s Yamaha Blaster +3mm Stroker Crankshaft—Checked and Trued
The Vito’s Yamaha Blaster +3mm stroker crankshaft is a proven performance upgrade for the 1988–2006 Yamaha YFS200 Blaster. Increasing the engine’s stroke helps add displacement and improve torque throughout the powerband.
Every crankshaft sold through Ken OConnor Racing is checked for runout and professionally trued when necessary. This additional inspection helps ensure the crankshaft is properly aligned before installation.
Increased Stroke and Displacement
The Yamaha Blaster uses a 57mm stock stroke. This Vito’s crankshaft increases the stroke by 3mm for a total stroke of approximately 60mm.
When combined with the appropriate cylinder, piston and engine setup, the additional stroke can provide:
- Increased engine displacement
- Stronger low- and midrange torque
- Improved acceleration
- Better performance for trail, dune and race builds
This crankshaft is also an excellent match for Vito’s Performance 240 big-bore cylinder kits.
Fits Factory Yamaha Blaster Crankcases
The Vito’s +3mm stroker crankshaft installs in the factory Yamaha Blaster engine cases without major crankcase modifications. Case trenching is not required, although slight clearance work or filing near the top of the crankcase may be necessary.
All crankshaft and connecting-rod clearances must be inspected during assembly.
What’s Included
- Vito’s +3mm stroker crankshaft
- New silver-cage wrist-pin bearing
- Crankshaft runout inspection
- Crankshaft truing when necessary
Not Included
- Stroker spacer plate
- Crankcase gaskets
- Main bearings
- Engine seals
The proper spacer plate, gaskets and engine setup must be used to maintain correct cylinder height, port timing, piston clearance and squish clearance.
Professional Installation Recommended
A stroker crankshaft is not always a simple stock-replacement installation. Cylinder height, piston position, port timing, deck clearance and squish clearance should all be measured during assembly.
Ken OConnor Racing offers complete Yamaha Blaster crankshaft, machining and engine-building services for customers who want their stroker combination properly inspected and assembled.
Product specifications
| Specification | Details |
|---|---|
| Brand | Vito’s Racing |
| Application | Yamaha Blaster YFS200 |
| Model years | 1988–2006 |
| Stroke increase | +3mm |
| Approximate total stroke | 60mm |
| Crankcase trenching | Not normally required |
| Wrist-pin bearing | Included |
| Inspection | Checked and trued if necessary |
| Spacer plate | Not included |
| Gaskets | Not included |
| Main bearings and seals | Not included |
FAQ
Does this crankshaft fit every Yamaha Blaster year?
Yes. This Vito’s +3mm stroker crankshaft fits Yamaha Blaster YFS200 models from 1988 through 2006.
Has the crankshaft already been trued?
Yes. Ken OConnor Racing checks the crankshaft for runout and trues it when necessary before shipping.
Do the crankcases need to be trenched?
Case trenching is not required. Slight filing or clearance work near the top of the factory crankcases may be necessary.
Is the stroker spacer plate included?
No. The required spacer plate and gaskets are not included.
Are crankshaft main bearings included?
No. Main bearings and engine seals must be purchased separately.
Will this work with a Vito’s 240 big-bore cylinder?
Yes. This crankshaft is designed to work well with Vito’s Performance 240 big-bore cylinder kits when the engine is properly configured and clearances are checked.
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