Description

Got a Yamaha Grizzly 660 from 2002 to 2008?
This Stage 1 jet kit is exactly what you need to dial in your carb for better throttle response and overall performance.
It comes with four main jets – 170, 175, 180, and 190 – so you can fine-tune based on your altitude, exhaust setup, or air filter mods.
Made in the USA, so you’re getting quality brass jets that flow consistently.

This is a basic Stage 1 kit, which means it’s perfect for near-stock machines with minor bolt-ons – think an aftermarket slip-on muffler or a less restrictive air filter.

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It’s not for big-bore kits or forced induction – just a simple, reliable way to cure that lean condition from the factory.

Grizzly 660 Jet Kit Basic Stage 1 Grizzly 2002-08 Carb Main Jets 170,175,180,190

If your Grizzly bogs when you crack the throttle or pops on decel, these jets will help clean that up.

The jets are genuine Yamaha-compatible pieces – brand is Yamaha, but they’re sold as a kit under part number 8801139419396s.
They fit the stock carb body directly, no adapters or modifications needed.

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Just pull your float bowl, swap the main jet, and test ride.
Start with the 180 and work your way up or down depending on plug color and seat-of-the-pants feel.

Good for both the Grizzly 660 4x4 and the 2WD models.

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Doesn’t matter if it’s an ’02 or an ’08 – all those years use the same carb internals.

Dynojet Jet Kit Yamaha Yfm660 Grizzly 2002-2008 - Q415

This kit is a cheap way to get your ATV running crisp again.
No more backfiring or hesitation – just smooth power all the way through the rev range.
If you’re into wrenching on your own quad, this is a fun Saturday project with big payoff.

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