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Description
Take your performance to new heights with a Jet Kit for your vehicles. Increase power and improve performance throughout the entire RPM range, while improving throttle response and smoothness. These Jet Kits take the guesswork out of tuning your vehicles.
Whether you’re rolling with a stock vehicles or you’ve made some modifications, our Jet Kit will optimize your air/fuel ratio to eliminate rough spots and help you take control of your vehicles’s power. You can go with a Stage 1 Jet Kit to give your stock engine a 5% boost of horsepower or send it all the way up to Stage 3 if you’ve already made major modifications to your vehicles.
STAGE 1 DETAILS
Perfect for vehicles with a stock engine using the stock airbox, air filter, and pipes. Stage 1 Jet Kits are engineered to improve throttle response and deliver approximately 5% more horsepower than stock. These kits are fully adjustable to allow the use of well-designed aftermarket pipes and stock replacement air filters, like K&N.
STAGE 2 DETAILS
If you’ve made slight modifications to your vehicles, but still crave more performance, a Stage 2 Jet Kit is the solution. With a Stage 2 Jet Kit, you could see power gains of approximately 8%. This kit is intended for vehicles with stock or mildly tuned engines using a well - designed aftermarket pipe with a modified airbox and a stock replacement air filter.
FEATURES
- 5-8% power range.
- Fully adjustable.
- Increases power and drivability.
- For carbureted vehicles only.
Technical Specifications
- MFG. Part Number 3243
Vehicle Information
Yamaha Raptor 660 ATV (2001-2005)
The Yamaha Raptor 660, produced from 2001 to 2005, was a prominent sport ATV renowned for its powerful engine and agile handling. It featured a 660cc single-cylinder, five-valve, liquid-cooled, 4-stroke engine, delivering approximately 36 horsepower. This engine was equipped with dual Mikuni 33mm carburetors and paired with a five-speed manual transmission that included reverse. The primary model was the Raptor 660R (YFM660R), with Limited and Special Editions offered in 2004 and 2005 respectively. While the core engine remained consistent, Yamaha introduced notable refinements throughout its production. Early 2001-2002 models were known for starter clutch issues. By 2003, Yamaha addressed feedback with a reinforced rear axle carrier and crucial frame reinforcements. The 2004-2005 models are often considered the "sweet spot," benefiting from improved suspension and gearing tweaks that enhanced overall rideability and performance. Q: How do I know which parts fit my Yamaha Raptor 660?
A: Please use the year and edition selector at the top of this page to ensure compatibility with your specific model.
Maintenance
| Component | Interval | Details |
| Engine Oil and Oil Filter | Every 100 hours or annually | The oil filter should be replaced with every engine oil change, or if necessary. These intervals are based on general Yamaha guidelines for 4-stroke engines. |
| Drive Chain | Regular inspection | The Yamaha Raptor 660 uses a drive chain, not a belt. Inspection is part of the regular maintenance schedule. |
| Spark Plug | Check, adjust gap, and clean; replace if necessary | Recommended spark plug: NGK DPR8EA-9. Gap: 0.8 to 0.9 mm. |
| Air Filter | Clean and replace if necessary. Every 20-40 hours, or more frequently in dusty/wet conditions. | Inspection is advised every 25-50 hours. Replace if dirty after cleaning, if seals are cracked/hardened, or after water exposure. |
| Coolant | Every 24 months | Regular replacement is vital for preventing overheating and extending the ATV's lifespan. |