How to Setup a 350 Four Stroke for Enduro

Setting up a 350 four stroke for enduro is more than just bolting on parts; it is dialing in protection, controls, suspension, tires, and ergonomics so the bike works for you on single track and race day. This page pulls together all the 350F setup videos, articles, and notes in one place so you can follow along, make smart changes, and build an enduro‑ready bike with confidence.

The 350 four stroke I rode across the country was a GasGas EX 350F. This is the base model that works very similarly to the KTM XC-F 350 and the Husqvarna FX 350. A lot of the parts work across the three brands. Just an FYI when you’re reading through, because even though I am doing all the work on a GasGas, it’s very relevant to the KTM and Husky 350’s as well.

Dirt bikers excited to pick up their new dirt bike.

GasGas EX 350F First Ride

Join Brian Pierce for his first ride impression on the 2024 GasGas EX350F, sharing upgrades and prep for the 2025 National Enduro Series.

Brian Pierce riding the 2024 GasGas EX 350F on its first outing, featured by Seat Time

Read the First Ride Impressions article

Bullet Proof Designs, Enduro Engineering, and Astra Handlebars

The best protection parts for the GasGas EX350F Enduro build, including radiator guards, hand guards, & more, to boost durability & performance in enduro racing.

ktm, GasGas, and Husky protection parts added to a 350 four stroke.

Read the Dirt Bike Protections article

The Four Stroke Setup Guide to Make You Race-Ready

Dirt bike rider and coach talking sag setting

Read the Four Stroke Setup Guide article

Balanced Bike and 350F Gearing

Learn how adjusting enduro bike gearing improves balance and suspension. Find the ideal gear ratio for better control and performance on any terrain.

A dirt bike rider and coach explaining bike balance and proper gearing.

Read the Balanced Bike and 350F Gearing article

The perfect four stroke handlebar height

Learn how to find the right handlebar height for your 4-stroke dirt bike. Tips on setup, testing, and expert advice to improve comfort and handling.

A rider showing his enthusiasm for finding the right handlebar height on his four stroke dirt bike.

Read the Four Stroke Handle Bar Height article

Upgrade Four Stroke Performance, Protection, and Comfort

Discover XCGEAR, SXS, and FMF upgrades for the GasGas EX350F to boost performance, protection, and comfort on your next ride.

GasGas EX350F equipped with XCGEAR MAKO360, SXS skid plate, and FMF exhaust upgrades

Read the Four Stroke Protection, Protection, and Comfort article

BikeGraphics Install, Neutech Rimtape and MX34’s Mounted

GasGas EX350F enduro build with custom graphics, SKF Mud Scrapers, Nuetech Rim Tape, and Dunlop MX34 tires. See how these mods prep it for racing.

GasGas EX350F with BikeGraphix graphics, Nuetech Rim Tape, and Dunlop MX34 tire

Suspension Revalved, Tusk Radiator Fan Added and new Clutch Plates

After the debacles at the Rattlesnake enduro, it was decided it was time to get the GasGas’ suspension revalved. Though I did get to ride and adjust before the Leadbelt Enduro, I still had some adjustment learnings to go through.

Brian Pierce navigating a rocky section on his red GASGAS dirt bike at the 2025 Leadbelt Enduro under a clear sky.

Dunlop AT82 Tires Front and Rear Was The Right Choice

The Dunlop AT82 tire height threw off my sag at Muddobbers National Enduro. I learned the hard way that you need to adjust your preload when swapping to an AT82.

Enduro racer on GasGas EX350F navigating dusty conditions at the Muddobbers Enduro

Read the Tire Setup Issue article

Four Stroke Setup FINALLY Feels PERFECT

After tweaking and dialing in the 350 four stroke all year long, as well as all the fitness and mindset gains from a ton of training, I had my best race, and result, of the entire year of enduro racing.

Enduro racer looking far ahead down the trail.

Read the final Race Recap of the year

2025 Race Recaps and Year in Year

The year wasn’t just about four stroke bike setup. It was about beginnign the best racer I possibily could. I believe I accomplished that. If you’re looking for that as well, dig in all the race recaps from the year. In them, I go through all the training, nutrition, hydration, and mindset work I did to become the best version of myself on the bike.