Episode 5 - Yamaha YZ250 two-stroke project series: Jetting and engine

Experienced Yamaha Australia technician Darren Thompson lifts the lid on jetting and tuning the Yamaha YZ250.
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We’re nearing completion of the Yamaha YZ250 two-stroke project, having found a suitable bike, discovered the kinds of changes we can make, tweaked the suspension and overhauled its appearance.
Now it’s time to fine-tune the 2019 model’s jetting and get it really running smoothly and crisply. Here, Sam Charlwood enlists the help of one of Australia’s most experienced two-stroke specialists, Yamaha’s Darren Thompson.
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[@sobredosis2]

Hi when you say one richer on the main you mean 182? and what needle position ? cheers

[@MrRASO16]

Probably 2nd from the top sir

[@sobredosis2]

@@MrRASO16 thanks

[@elcincero321]

No, 180 Main Jet