removed choke and now wont start

[dirty habits400]

removed the choke on sunday and now the bike wont start i dont rember what size jet is in or pilot jet and and if this is the problem what size jets and pilot size do i need also running the bike with no lid and sparks x-6 and k&n ride under 5000ft thanks for your help

[JOEX]

You will most likely need to up the pilot jet to a 42 or maybe a 45. The main jet will probably be fine but you might be able to go up one size to take advantage of the slightly less restricted airflow.

From what I have read about this mod, it is more for top end (high rpm) motors.

Joe

[y2k400ex]

I removed my choke also, a bigger pilot will deffinatly help

But if you need to choke it to start it just squeese the intake boot while you starting it, that works for me

[dariusld]

I have the stock pilot jet and no choke. After I removed my choke I didn't have a problem starting it. Do a search on "removing choke" and you might get some useful info.. One trick you might try is to take off your air filter and cover the whole with your hand and see if it starts. And if you haven't already, pump the throttle 3 - 5 times, before you push the start button.

[400exdad]

I live at almost sea level and have a 42 pilot, with a choke. It is still a bit cold natured, but not like it was with the 38 pilot. At 5000 ft and no choke, you'll definately need the 45 pilot and you'll have to pump the heck out of it to crank and to keep going at first.

[Stock 400 rider]

is is that better to take the choke off?
Any significant diference?
Is it worth?
Thanks

[y2k400ex]

I noticed just a little more throttle response thats about it

[JOEX]

Originally posted by 400exdad
I live at almost sea level and have a 42 pilot, with a choke. It is still a bit cold natured, but not like it was with the 38 pilot. At 5000 ft and no choke, you'll definately need the 45 pilot and you'll have to pump the heck out of it to crank and to keep going at first.
At higher eleveations don't you normally decrease the jet size?

Joe

[dirty habits400]

also when i was trying to start it i was gving it gas and it did have gas in the carb it would sound like it would start and once in awhile it was backfire. i will go get a bigger pilot jet this weeknd and try. thanks for ur help.

[Out_Sider]

42 pilot