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The 2014 Yamaha YZ85 is a youth competition motocross motorcycle with an 85cc liquid-cooled two-stroke engine and six-speed transmission. Yamaha’s 2014 owner’s manual covers both the standard YZ85 and large-wheel YZ85LW; tire sizes, gearing and some dimensions vary, so identify the exact version before using specifications or ordering parts.
2014 Yamaha YZ85 specifications
These are Yamaha’s year-specific specifications from the 2014 owner’s manual. Standard-model measurements should not be treated as universal YZ85LW figures.
| Specification | 2014 standard YZ85 | 2014 YZ85LW |
|---|---|---|
| Engine | 85cc liquid-cooled two-stroke | 85cc liquid-cooled two-stroke |
| Bore × stroke | 47.5 × 47.8 mm | 47.5 × 47.8 mm |
| Carburetor | PWK28 | PWK28 |
| Transmission | Constant-mesh six-speed | Constant-mesh six-speed |
| Clutch | Wet multi-disc | Wet multi-disc |
| Front tire | 70/100-17 | 70/100-19 |
| Rear tire | 90/100-14 | 90/100-16 |
| Seat height | 34.0 in (Yamaha, 2014) | Not stated here; consult the applicable manual |
| Wheelbase | 49.5 in (Yamaha, 2014) | Not stated here; consult the applicable manual |
| Final-drive ratio | Variant-specific | Variant-specific |
Source: Yamaha Motor Co., Ltd., 2014 owner’s manual, reproduced at Manualslib. Confirm any measurement against the manual for the exact model and market suffix.
YZ85 vs. YZ85LW: what changes?
The LW is the large-wheel version: the manual lists a 19-inch front tire and 16-inch rear tire, compared with 17-inch and 14-inch tires on the standard YZ85. Yamaha also specifies different final-drive ratios for the variants. Those differences can affect fit and setup; the available specifications do not establish that one version is faster, safer, or a better choice for a particular rider.
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The 2014 manual’s title includes YZ85/YZ85F and YZ85LW/YZ85LWF. Check the model identification on the bike and the applicable market version rather than assuming every bike labeled YZ85 has the standard-wheel configuration.
Spark plug and gap
Yamaha’s 2014 owner’s manual specifies an NGK BR10EG spark plug with a gap of 0.5–0.6 mm (0.020–0.024 in). Verify the bike’s year and variant against its manual before purchasing a replacement.
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Manual, maintenance and safety
The owner’s manual is the practical reference for operation, pre-ride inspections, maintenance, adjustments, troubleshooting and storage. Yamaha describes this as a youth competition motorcycle and cautions parents to understand the manual’s instructions and warnings before allowing a child to ride, noting that children differ in skill, physical ability and judgment. The manual puts it plainly: “This motorcycle is not a toy.”
Yamaha’s 2014 manual is reproduced at Manualslib. Use that year-specific document for service procedures and safety instructions rather than relying on a current-model page.
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Finding the right 2014 YZ85 parts diagram
Yamaha’s 2014 parts catalogue covers YZ85F/YZ85/YZ85LW model labels and directs users to order by part number and name. When looking up a diagram or replacement component, match the bike’s year, exact model or market suffix, and frame identification. A seller’s generic “fits YZ85” description does not by itself confirm 2014 compatibility.
Use the catalogue’s part number and name when checking with a parts supplier or Yamaha dealer. The catalogue is reproduced at Yamaha Parts House; verify the catalogue selection against the motorcycle’s identification before ordering.
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- Nine intake and four exhaust vents help maximize airflow and moisture management, while the lightweight injection-molded polycarbonate and ABS shell construction offers a precise fit with 4 shell and 5 EPS sizes.
- Fit & Sizing: Designed for a snug, secure fit. Please measure head circumference and reference the size guide in the product images. If between sizes or unsure, size up.
How current-model information applies
Yamaha’s current YZ85 pages describe newer motorcycles and accessories, not the 2014 model. A current specification or accessory listing is not proof of 2014 fitment. For a replacement part, confirm compatibility through year-specific fitment, the applicable parts catalogue, or a Yamaha dealer.
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