my friend bought a 400ex yesterday and it won't idle, what do you suggest doing or what do you think is wrong?
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Registered User
my friend bought a 400ex yesterday and it won't idle, what do you suggest doing or what do you think is wrong?
2003 400EX, Maxxis Razr IIs,Douglas Wheels Technology Rims, AC Mudscreen Front Bumper, Durablue Rear Axle, Lonestar Steering Stem, Silver Maier Race Cut Fenders, Pro Design Kill Switch, Renthal handlebars, K&N Air Filter, Outerwear prefilter, HMF Exhaust, Hinson Racing Clutch, Pro Armor Nerfbars, Stage 2 hotcam.
"There is a very fine line between "hobby" and "mental illness."
just killing time
have any engine mods been done be more specific please
__________________
Blingstar nerf bars
Blingstar bumper
Proarmor full skid
Pro Taper cr high bend
Houser +1 stem
Lonestar clamp
Lonestar park brake block off
MSR clutch perch
G-Force axle
Durablue Locknut
Renthal Sprockets
ITP T9 front Baja rear
Kenda Claws
DG baja skid plate
Registered User
no engine mods, white brothers exhaust
2003 400EX, Maxxis Razr IIs,Douglas Wheels Technology Rims, AC Mudscreen Front Bumper, Durablue Rear Axle, Lonestar Steering Stem, Silver Maier Race Cut Fenders, Pro Design Kill Switch, Renthal handlebars, K&N Air Filter, Outerwear prefilter, HMF Exhaust, Hinson Racing Clutch, Pro Armor Nerfbars, Stage 2 hotcam.
"There is a very fine line between "hobby" and "mental illness."
talk to me goose
list everything that the bike has done to it. does it run fine anything above idle? does it stutter, miss, etc when you punch it or under load? it may be as simple as an idle adjustment..... be specific on the symptoms.Originally posted by tman12345
my friend bought a 400ex yesterday and it won't idle, what do you suggest doing or what do you think is wrong?
02' 400ex
-440 wiseco kit
-11:1 compression
-stage 2 hotcams
-mild port work w/ matched intake
-sparks advance key
-K&N filter kit w/uni outter cover
-air box lid w/ 1 3/8" hole drilled
-duncan racing fat boy 4 system exhaust
-front works tripple remote rezzies by Bob Bell
-oneal bars
-rcd oil tank
-05 R6 LED tail
-trail tech lights
-maier race cut white plastics
HOW TO install an R6 tail light to your 400EX
HOW TO install a brake light switch
Registered User
runs fine above idle, when it idles, it varies from no idle to about maybe 10 seconds, its fine otherwise,
2003 400EX, Maxxis Razr IIs,Douglas Wheels Technology Rims, AC Mudscreen Front Bumper, Durablue Rear Axle, Lonestar Steering Stem, Silver Maier Race Cut Fenders, Pro Design Kill Switch, Renthal handlebars, K&N Air Filter, Outerwear prefilter, HMF Exhaust, Hinson Racing Clutch, Pro Armor Nerfbars, Stage 2 hotcam.
"There is a very fine line between "hobby" and "mental illness."
just killing time
take apart the carb and clean it, sounds to me like the floats sticking
__________________
Blingstar nerf bars
Blingstar bumper
Proarmor full skid
Pro Taper cr high bend
Houser +1 stem
Lonestar clamp
Lonestar park brake block off
MSR clutch perch
G-Force axle
Durablue Locknut
Renthal Sprockets
ITP T9 front Baja rear
Kenda Claws
DG baja skid plate
Registered User
ok we shall do that any other suggestions
2003 400EX, Maxxis Razr IIs,Douglas Wheels Technology Rims, AC Mudscreen Front Bumper, Durablue Rear Axle, Lonestar Steering Stem, Silver Maier Race Cut Fenders, Pro Design Kill Switch, Renthal handlebars, K&N Air Filter, Outerwear prefilter, HMF Exhaust, Hinson Racing Clutch, Pro Armor Nerfbars, Stage 2 hotcam.
"There is a very fine line between "hobby" and "mental illness."
Senior Member
I don't know alot about these motors. But I went outside and cranked mine up. If the choke is left on it dies, might be that simple.
Dave
2006 400 EX
Trailtech 1 1/8 X-Bars
Trailtech Riser, Vapor Protector
Trailtech Vapor computer
Tusk Comp Series Nerf Bars
Tusk Full Chassis Skid Plate
Tusk A-Arm Skid Plates
"Run her hard, but at the end of the day treat her like a lady!"
"Fix it right or fix it again"
Don't drink... Don't smoke... Don't do drugs... and I'm proud of it! I guess I plan on living longer than most.
just killing time
take the choke out of the carb and swap in a 42 pilot jet, i live in wisonsin cold as fu** in the winter, i still do not need a choke. plus it help w/ throttle response. there is a write up in the how 2 section.
__________________
Blingstar nerf bars
Blingstar bumper
Proarmor full skid
Pro Taper cr high bend
Houser +1 stem
Lonestar clamp
Lonestar park brake block off
MSR clutch perch
G-Force axle
Durablue Locknut
Renthal Sprockets
ITP T9 front Baja rear
Kenda Claws
DG baja skid plate
Giv'er the salty pirate!!
maybe the idles set to low?
2002 440ex
PEP•Wiseco•Duncan•AC•Dunlop
'98 ford f150 4x4
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