It’s rumored that the 250R runs a little lean down low in the stock form. Once people start to pull airboxes or start adding exhausts to the mix you start to run the risk of really leaning out your engine — Which will end badly..

There are a few shim mods you can do to your fuel jets to help with fatten up the mixture (that’s another day) — or for about $80 you can pick up one of these nice little kits from DynoJet.

The Kit includes 4 sets of jets, titanium fuel needles, and a few other bells and whistles needed to get the job done. With the Stock DJ096 jets and a stock Airbox the Dyno Charts show a smooth increase in power from about 5,000 RPM’s to 9,000 RPM’s (Almost 2HP) With the real gain coming after the sharp 10,500 RPM to redline drop off the stock bike has.

Manufacture Website: http://www.dynojet.com
Part Number: 2193
Price: ~90$ Shipped

I just got my kit, I’ll try to do a install walk through together once I get my exhaust in.

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