Show #433 - 2025 Yamaha YZ250 Garage Build

·1 hr 3 min·5 clips

Kris Keefer asks if older riders should ditch their four-strokes for a two-stroke like the 2025 YZ250.

The episode begins with host Kris Keefer introducing the show and its sponsors, followed by casual banter with guest Eddie Larratt about beverage preferences. Keefer sets the stage by stating the episode will focus on a 2025 Yamaha YZ250 garage build featured on Racer X. He frames the discussion around whether two-strokes are still viable for older riders or those looking to switch from four-strokes. Keefer and Larratt compare the Yamaha YZ250 to KTM's two-strokes, with Keefer preferring the YZ for its KYB suspension and low-end feel, while noting KTM's fuel-injected models are smoother but lack the desired 'hit'. Larratt shares an insight from amateur racing, stating that 75% of KTM 125s on starting lines are carbureted, not fuel-injected, due to performance preferences. The core of the episode details Larratt's build of the YZ250. He kept the cylinder stock but added a Pro Circuit pipe and silencer, VForce 4X reed block, and custom jetting using a N3EJ needle from an older YZ250, with a fuel mix of Shell 91 and VP C12. He explains his reasoning for a 'light build' aimed at practice riding. The discussion highlights the appeal of two-strokes for their simplicity, lower cost, and as a fun alternative to four-strokes. The episode then shifts to suspension with a call to Mark from REP Suspension. Mark explains the YZ250's unique setup: its forks are 8mm shorter and have a 25mm offset compared to four-stroke models, and it uses older KYB technology with a 24mm cartridge and 46mm shock body. He shares that they developed settings based on feedback from racer Derek Drake. Later, Mark reveals a prototype bolt-on frame gusset system for Yamaha 450s that costs around $40 and can improve front-end feel by altering frame flex and geometry. The conversation covers other aftermarket parts on the build, including XTrig clamps, Works Connection clutch perch, Lightspeed carbon fiber components, and Dunlop tires. Keefer and Larratt reflect on the fun of riding something different and the role of two-strokes in attracting and retaining riders in the sport. The episode concludes with logistical updates, promotional messages for sponsors, and personal anecdotes, including Keefer's concept of 'surges' of affection.

As heard by us

A candid YZ250 build discussion measures two-stroke nostalgia against how the bike actually rides.

The YZ250 build discussion settles into the gap between two-stroke nostalgia and the less romantic feeling of climbing back on one after years with four-strokes.

Read the full review in PlayNext →

Why you'd press play

Press play when a two-stroke has you wondering whether nostalgia still knows how to ride.

Read the full recommendation in PlayNext →

Listen to the show on

Apple Podcasts Spotify

Play clips from this episode More from Rocky Mountain ATV/MC Keefer Tested