Namura\'s Top End kit is ideal for replacing worn parts and making some upgrades. Machined Smooth heads, available for certain models, can increase horsepower and fuel economy while reducing carbon buildup.
Whenever possible we use picture of the actual part number. Some items do use stock photos provided by the manufacturer.
Namura\'s Top End kit is ideal for replacing worn parts and making some upgrades. Machined Smooth heads, available for certain models, can increase horsepower and fuel economy while reducing carbon buildup.
Namura\'s Top End kit is ideal for replacing worn parts and making some upgrades. Machined Smooth heads, available for certain models, can increase horsepower and fuel economy while reducing carbon buildup.
Namura\'s Top End kit is ideal for replacing worn parts and making some upgrades. Machined Smooth heads, available for certain models, can increase horsepower and fuel economy while reducing carbon buildup.
- Top End kit includes: piston, rings, wrist pin, clips, top end bearing, and gasket kit
- MOS2 (Teflon/Molybdenum) Coated Skirts - A rolled on application process provides a bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizures
- Machined Smooth Heads - Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%
- Anodized Domes - Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons
- Hypereutectic Casting Process - Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures
- Piston Size: 95.50mm
- Images are for reference purposes only
- Engine Type: 4-Stroke
- Piston Type: Cast
- Piston Size: 95.50mm +.5
- Compression Ratio: 8.5:1
- 1998 Yamaha Grizzly 600 YFM600FWA 4x4
- 1999 Yamaha Grizzly 600 YFM600FWA 4x4
- 2001 Yamaha Grizzly 600 YFM600F 4x4
- 2000 Yamaha Grizzly 600 YFM600F 4x4
CLICK HERE to check out our other NEW Grizzly 600 parts.
Make sure to check out our other used Grizzly 600 parts.
Orders containing multiple items may ship separately in multiple shipments. They may not arrive at the same time and may take another couple of days for the complete order to arrive.Free and Flat Rate Shipping is limited to lower 48 States only.We ship Mon-Fri excluding Holidays.We use FedEx, UPS, and USPS. Which shipping method is used for your order is at our discretion. If you have a physical address and a PO box please provide both.Please make sure the shipping address is correct at checkout. Our shipping process is highly automated and shipping does not have access to messages.If you make an error in the address or wish to cancel an order send an official CANCEL TRANSACTION REQUEST IMMEDIATELY. We do hold order a few minutes to allow for then. Our fulfillment process is automated and the CANCEL TRANSACTION REQUEST must be received before the order is sent to the warehouse and added to a pull sheet.Once the order is sent to a pull sheet at one of our warehouses we are NOT ABLE to change the address or cancel the order. It WILL SHIP to the address provided at checkout. We would if we could but they why our automated shipping works it is not possible to change or shop the order from shipping.Hawaii, Alaska, Puerto Rico and APO addresses must contact us prior to purchasing item for a shipping quote first. Shipping fees to APO, AK, PR and HI will be calculated individually and added to customer invoice prior to paying for the item.Make sure you have packages delivered to a secure location. We can not cover packages stolen after delivery.International Shipping
- International shipments will ship through the Global Shipping Program.
- PirateMX Powersports is not responsible for taxes and duties which may be due on your shipment.
- Please note that all prices are in U.S. Dollars. Any fitment provided is for US Spec models.
Returns PolicyReturns are accepted up to 30 days from purchase date
- Items must be in new condition, no returns are accepted on used or installed items. If the products show any signs of installation, we cannot accept the return.
- Item must be in original undamaged unopened packaging.
- Any and all returned electrical items that are not sealed will be considered USED and not resell-able and not eligible for a full refund.
- Use our shipping packaging to ship back the item, DO NOT tape the label directly to the original manufacturer’s box.
Contacting Us for a ReturnItems purchased on must be returned using the return process. Send us a message via for help starting a return.
WarrantiesAll items are new in box unless listed otherwise. Any warranties are from the products manufacturer.
In the unlikely event you need to make a warranty claim, we will assist with the process. Products are limited to the manufacturer\'s warranty..
To contact us about a warranty related issue..
- WARNING: This product contains chemicals known to the State of California to cause cancer and/or reproductive harm, and birth defects or other reproductive harm.
