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Yamaha Raptor 660R ATV Genuine Yamaha Technology Racing Parts - OEM Upgrades Off Road Alternatives

Posted in Product Reviews on February 1, 2005 Comment (0)
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It's a great thing when OEMs get into the sport. It provides high-dollar engineers who make great performance products for consumers that are looking for a little more. Yamaha has embraced this idea with its line of Genuine Yamaha Technology Racing (GYTR) parts. The GYTR upgrades include performance for power and style, and can be had on anything from a bike cover to a high-compression piston. The great thing about these parts is that you can walk into your local Yamaha dealer and it'll bolt them on per your request.

GYTR goods are Yamaha-approved performance products, and for the most part, won't void the unit's warranty. We took our Yamaha Raptor 660R and added some of the basic upgrades an end-user would most commonly make. We didn't run the Raptor on the dyno, but we can say by a seat-of-the-pants test that the parts really woke up the quad, and not all the performance was on the top end.

A lot of aftermarket parts compromise one end of the powerband to enhance the other. This isn't true with the GYTR mods we made. With the intake, header, pipe, and carb jetting, we found that the single-piston thumper increased power through its power range. Here's a quick snap on what we did.

A simple sticker swap was an easy way to personalize our Raptor.

The pipe and header were the backbones of opening up the 660R. These mods attack all your senses. You can't make these changes without rejetting, though. The motor will run lean, and internal damage may occur. This is one of those situations where if you brought it back to the dealer looking for warranty work, he'd laugh you out of his store.

The Raptor's 660cc engine is fed by two carburetors. The five-valve head uses three of its valves to pull in the new charge. We're also going to change the intake, so asked for a jet kit to accommodate these changes.

The new filter breathes air better than the foam filter, but it also doesn't filter as many particles. The kit came with the GYTR pre-filter, which is a must if you plan on any silt or sand riding.

The pipe and header were the backbones of opening up the 660R. These mods attack all your senses. You can't make these changes without rejetting, though. The motor will run lean, and internal damage may occur. This is one of those situations where if you brought it back to the dealer looking for warranty work, he'd laugh you out of his store.

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