WISECO
WISECO Piston Kit YZ450F STD W4785M09500B
WISECO Piston Kit YZ450F STD W4785M09500B
In stock, ready to ship
Couldn't load pickup availability
In stock at our shop in west Wales
2 on the shelf, packed and sent from Tal-sarn near Lampeter.
- Free click and collect from the shop at SA48 8QB, usually ready within 24 hours
- 30 days to change your mind, and we pay the postage if it is our mistake
- Brand
- WISECO
- Part number
- 09100373
- Category
- PISTON + RING KITS
WISECO Piston Kit Forged Series for 4-Stroke
Piston Kit - 95.00 mm - Gas Gas | Yamaha
- Forged 4-stroke piston is designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength
- Dedicated forgings allow for optimized strength-to-weight ratio
- Ideal for multiple purpose riding
- Kit includes piston, wrist pin, rings and circlips
Fits Nikasil bore cylinder. Kit Includes: • 1x Piston • 1x Ring Set #3741XS • 1x Wrist Pin #S600 • 1x Circlip Set #CW18
Note: Fits Nikasil bore cylinder. Kit Includes: • 1x Piston • 1x Ring Set #3741XS • 1x Wrist Pin #S600 • 1x Circlip Set #CW18
Specifications
| Brand | WISECO |
|---|---|
| Manufacturer part number | W4785M09500B |
| Manufacturer description | PISTON KIT YZ450F STD |
| Full description | PISTON KIT |
| Engine Type | 4-Stroke |
| Model | Forged Series |
| Bore - Oversize | Standard |
| Riding Style | Adventure Touring / Dual-Sport, Off-Road |
| Bore Size | 95.00 mm |
| Product Name | Piston Kit |
| Units | Kit |
| Compression Ratio | 12.3:1, 12.5:1 |
| Piston Material | Forged 2618 Aluminum |
| Skirt Coating | ArmorGlide® |
| Displacement | 449 cc |
| Stroke Length | 63.40 mm, 63.00 mm |
| Piston Diameter | 94.94 mm |
| Country of origin | USA |
In the box
- 1 x WISECO Piston Kit Forged Series for 4-Stroke (part number W4785M09500B)
Sold individually unless the title or specification states otherwise.
Fits 3 models
- YAMAHA WR 450 F (2003-2015)
- YAMAHA YZ 450 F (2003-2009)
- GAS GAS EC 450 F (2013-2015)
Years shown are per model. If your bike is not listed, contact us with the year, make and model and we'll confirm before you buy.

Does it fit your bike?
3 models across 2 makes. Not sure? Call the parts counter on 01570 470 022.
- WR 450 F2003-2015
- YZ 450 F2003-2009
- EC 450 F2013-2015