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one300exer
01-23-2005, 05:57 PM
my 400ex will not start. Its totally stock, its getting gas and spark. It will try and start, but won't. could it be because it is cold and the oil is thick. im using honda 10-40 oil. any suggestions



Honda 400 ex
Ac nerf bars
Ac stadium bumper
pro design kill switch
douglas front rims
Holeshot Front and rears
durablue wheel spacers
Nac's Number Plate
K&N prefilter
the Z Man
01-23-2005, 06:08 PM
Check the timing. Z.
47501exracer
01-23-2005, 06:44 PM
The problem is it is cold outside. You need to put a 42 pilot jet in it. I also hold the throttle WFO and it will start. Do a search, this is a commom problem with the 400ex.
one300exer
01-23-2005, 07:54 PM
How big is the stock pilot jet?


Honda 400 ex
Ac nerf bars
Ac stadium bumper
pro design kill switch
douglas front rims
Holeshot Front and rears
durablue wheel spacers
Nac's Number Plate
K&N prefilter
400EXrider77
01-24-2005, 07:43 AM
is your plug fouled?
fmf400ex03
01-24-2005, 08:14 AM
nah it aint cuz its cold i had a stock pilot with mobil red cap wich is 15w40 and it is about 3dagrees here no problems a lil choke and a lil throttle fires right up and its a 2000
fmf400ex03
01-24-2005, 08:15 AM
it isnt timing sense its stock you cant adjust it the only way you can is with a timing key other than that there is no adjustment
the Z Man
01-24-2005, 04:08 PM
aaahhhh, its possible it jumped a tooth, timing is easy to check, keep it simple, evaluate and eliminate.
chevy71
01-25-2005, 11:45 AM
As exrider77 said, check your plug. I let mine set a week after casual riding. Tried starting it and nothing. Replaced the plug and bingo, it fired up.

James
UglyMotha™
01-25-2005, 11:53 AM
Originally posted by the Z Man
aaahhhh, its possible it jumped a tooth, timing is easy to check, keep it simple, evaluate and eliminate.



you say keep it simple yet the first thing you tell him to do is check his timing :huh


just change the plug, it's gas fouled
Rico
01-25-2005, 11:55 AM
Originally posted by UglyMotha™
you say keep it simple yet the first thing you tell him to do is check his timing :huh


just change the plug, it's gas fouled

LMFAO


Yeah I'd bet $10 the plug is fouled.


Although, you might want to pull the jug off and see if the crank is cracked...:scary: