[42 pilot] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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42 pilot
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Posted by: hemi400ex

will putting a 42 pilot in my completely stock 400 cause any problems so it starts better in the cold

Posted by: MO-EX-RIDER

no just dont flood it!

Posted by: hornetgod13

A larger pilot jet will make cold weather starting much easier but, a #42K may be too big (rich) for a stock 400EX. I would install a #40K. Bump it up if you make any motor, air box, or exhaust mods.

Posted by: Honda#4

No it will not cause any problems cus I have one in my bike and it starts right up, just push the throttle three times and it will fire right up. There's no harm in jetting unless it is done wrong.

Posted by: exboomer

What is the stock pilot jet size?

Posted by: hornetgod13

#38 Keihin is stock. Most people, frustrated with cold weather starting issues, bump them up to a #40 or #42.

Posted by: blown331

my 42 has worked flawless, with the lid on or off...

couple pumps on the throttle she fires right up

Posted by: jsmith2232

my buddy put one in his stock 05' and it made the low end alot more torquey. definitely worth it. and cold starts are alot easier

Posted by: interceptorz28

I installed a 42 a couple months ago. It does start a little better, but it still takes a bit of effort.