JD 400 problems

jd400_21x · Post by **jd400_21x** » Tue Jan 27, 2009 10:49 pm

I have a 76 model 400 with a 340 kioritz and wlbro wra-31 carb. I replaced all fuel line cleaned carb and the tank added a fuel filter and even replaced the pickup in the tank. Then pulled and pulled to get fuel in the lines, when it started finally i warmed it up and rode it around the yard once went to go again and the motor would bog down when the throttle was open at all. Crank seals were checked with carb cleaner. The filter at first filled up to about 3/4 full at first now it only fills to about a 1/4 full of fuel. right now i am at a loss my 300 never gave me these problems.

Thanks in advance

JDFanPa · Post by **JDFanPa** » Wed Jan 28, 2009 12:17 am

Being a 76 with a plastic tank eliminates rust in the tank but you could still have crude blocking the pickup. It also doesnt take much to block up a fuel filter have you tried pulling it off sand blowing through it?

Rodimus Prime · Post by **Rodimus Prime** » Wed Jan 28, 2009 1:34 am

340/22 with small carb O.o

DLDeere · Post by **DLDeere** » Thu Jan 29, 2009 2:04 am

RP

340/22 with small carb O.o

?????????

jd400_21x · Post by **jd400_21x** » Thu Jan 29, 2009 9:44 pm

Fuel pick up is fine replaced gasket around it five minutes ago still no change it starts and idles fine and will rev up barely enough to engage the clutch after that it bogs out so i guess I'm still looking for some more advice.
Thanks

Rodimus Prime · Post by **Rodimus Prime** » Thu Jan 29, 2009 11:13 pm

340/400/440 usually have the 40 mm bore carbs ie wda

harleysportster · Post by **harleysportster** » Thu Jan 29, 2009 11:31 pm

jd400_21x wrote:I have a 76 model 400 with a 340 kioritz and wlbro wra-31 carb. I replaced all fuel line cleaned carb and the tank added a fuel filter and even replaced the pickup in the tank. Then pulled and pulled to get fuel in the lines, when it started finally i warmed it up and rode it around the yard once went to go again and the motor would bog down when the throttle was open at all. Crank seals were checked with carb cleaner. The filter at first filled up to about 3/4 full at first now it only fills to about a 1/4 full of fuel. right now i am at a loss my 300 never gave me these problems.

Thanks in advance

The carb should work. The filter at 1/4 full is normal. As they clog up they fill up more. Does your 340 have cdi ignition. If so, I would check the ohm readings for the high speed windings. The specs are found in the FAQ section.

jd400_21x · Post by **jd400_21x** » Fri Jan 30, 2009 8:34 am

So if I go out to the JD boneyard what WDA carb should I look for? As for the CDI box I will try to ohm it out but what and where are the wires i need to check & what should they read?

JDT · Post by **JDT** » Fri Jan 30, 2009 11:58 am

There is a WRA-31 on ebay right now. Looks clean.

You can not really check a CDI with an OHM meter. But you can check your stator very easily with your meter.
There is a great write-up in the FAQ section on this procedure which will only that 10 minutes.

I am with Harley on this one... bad hi-speed winding on your stator.

You will find a NOS stator on a forum member e-Bay store.

jd400_21x · Post by **jd400_21x** » Sun Feb 01, 2009 6:02 pm

Just hooked the meter up to the yellow & green wires that go to the cdi box with the plug connected to the motor and got a 2.43ohm reading also i noticed there is a "o" type wire connector under the dash area with 3 black wires together in that connector, it is not hooked up to anything is that a problem. also i seem to have followed someone elses screw up with my fuel lines I use 5/16 lines except for my pulse line which is a 1/4 tygon. the fuel lines are tight and seem to seal up so mybe not a problem but I guess I could use some more input.
Thanks

jd400_21x · Post by **jd400_21x** » Sun Feb 01, 2009 6:04 pm

also how was i supposed to test the stator i couldn't find anything but wiring schematics here maybe i just looked at the wrong spot.

JDT · Post by **JDT** » Sun Feb 01, 2009 6:42 pm

Go to the FAQ section. there it is under "testing CDI Kioritz"

harleysportster · Post by **harleysportster** » Sun Feb 01, 2009 7:16 pm

Click Here:
http://s12.zetaboards.com/jdsleds/topic/3001/1/

JDT · Post by **JDT** » Sun Feb 01, 2009 7:20 pm

Harley is that what you posted last night that did not work for me?

harleysportster · Post by **harleysportster** » Mon Feb 02, 2009 1:36 pm

I really don't remember, I thought you were having trouble with the from the online catalog of the electric start kit.