ATV Exhaust Guide: Yamaha Grizzly, Raptor and YFZ Options

Yamaha's ATV lineup spans everything from the hard-working Grizzly utility quad to the full-send performance of the Raptor and YFZ. Whatever you ride, an aftermarket exhaust system is one of the highest-impact modifications available — and for quad riders, it's often one of the first upgrades made. This guide covers the key options across the main Yamaha ATV families.

Yamaha Grizzly Exhaust Upgrades

The Grizzly range — including the Grizzly 700, 700 EPS and older Grizzly 660 — uses a single-cylinder or parallel-twin engine depending on model year. These are working quads that benefit hugely from better breathing, whether you're hauling in the field or blasting green lanes.

Slip-on Exhausts for the Grizzly

HMF Engineering and Big Gun Exhaust both produce quality slip-on systems for Grizzly models. HMF's Optimizer series is a proven performer — the stainless canister mounts directly to the stock headpipe and increases mid-range torque noticeably. For riders who want more noise with less hassle, a slip-on also requires no jet kit or fuel tuning on modern fuel-injected Grizzlys.

Full Systems for the Grizzly

A full system maximises gains, particularly on the Grizzly 700. Pro Circuit and Yoshimura both produce complete systems with stainless or titanium headers and end cans. Full system installs on the Grizzly are well within the ability of a competent home mechanic — allow two to three hours and have a new exhaust gasket to hand.

Yamaha Raptor Exhaust Options

The Raptor range — primarily the Raptor 700 and Raptor 700R — is built for performance. The 686 cc single-cylinder engine is the heart of one of the most respected sport quads ever made, and exhaust tuning is essential for getting the best out of it.

Best Exhausts for the Raptor 700

Yoshimura's RS-2 full system is widely considered the benchmark for the Raptor 700 — with race-bred headers, a stainless mid-pipe and a carbon fibre or aluminium end can, it unlocks several horsepower over stock and transforms the character of the bike. HMF's Performance series and Big Gun's Evo R are strong alternatives at lower price points.

For carburettored Raptor models, a jet kit is essential after fitting a full system to prevent lean running. Fuel-injected models benefit from a Dynojet Power Vision or similar tuner.

Yamaha YFZ450 and YFZ450R Exhaust Guide

The YFZ450R is a high-strung machine built for motocross tracks and desert racing. Every component matters, and the exhaust system is no exception.

YFZ450R Exhaust Options

Pro Circuit's T-6 stainless full system is the choice of serious YFZ450R riders — it's race-proven, durable and unlocks the engine's top-end potential. Yoshimura, FMF and HMF all produce quality alternatives. On the YFZ, the header routing is tight, so fitting quality is paramount — stick to well-known brands with model-specific fitment guarantees.

Spark Arrestors

If you ride on forestry land or land requiring spark arrestor approval, ensure your chosen system includes a removable or optional spark arrestor insert. Most quality brands offer this as either standard or an optional extra.

ATV Exhaust Installation Tips

• Heat gloves are a must — even after apparent cooling, ATV exhausts retain dangerous levels of heat.
• Replace the header gasket every time you remove the system.
• Apply anti-seize to all threads — ATV exhaust bolts are particularly prone to seizure due to vibration and exposure.
• Check clearance from bodywork and fuel lines on sport quads where components are tightly packaged.
• Re-torque fasteners after the first heat cycle — thermal expansion can loosen them.

Shop ATV Exhausts at Euro Motards

We stock exhaust systems for Yamaha ATVs including the Grizzly, Raptor and YFZ ranges. Browse the full selection in our exhaust collection — all systems include fitting hardware and are dispatched quickly from our UK warehouse.