Track N' Trail Project Build: 2021 GasGas EX350

For this build, Jay Clark from dirtbiketv1 wanted to build the ultimate "do-all" bike and his weapon of choice is this 2021 GASGAS EX350. This platform is the same basics as the KTM 350SXF with a wide ratio transmission and an additional 6th gear over the full moto models.

For the motor on this build, Jay opted to not go to his old reliable Cylinder Works big bore but go with a standard bore mod with Jamie Ellis at Twisted Development. Jay does admit that the stock EX350 is great as is. However, for those looking to have the ultimate in power for the track or trail is what Jamie does. Head porting and a “mapped” Vortex ECU are the keys to those power gains and lack of flame-out/stalling on the trail. A Blais Racing clutch weight helps in this area as well.

For the Suspension Jay went to Race Tech with a set of KYB conversions from Technical Touch to bypass the stock air forks. So, why not run the stock air? Jay says “because he doesn’t have to". If you can run the best then why not?

Check out the photos below, then some of the key components and the brands a bit farther down.

Twisted Development
www.td-racing.com
Vortex ECU
Engine mapping with Vortex ECU
Head Porting
Intake boot
Air Filter Cage

Vertex Pistons
www.vertexpistons.com
Standard Compression Piston kit (rings, DLC pin and clips)

Race Tech
www.racetech.com
Suspension set up-with KYB kit forks-
Suspension Re-Valve and set up

Technical Touch
www.technicaltouchusa.com
KYB Conversion kit for AER48 forks

Supersprox
www.supersproxusa.com
Rear Stealth Sprocket
Front Sprocket
Gold MX Race Chain G520-MXT-L-120