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Rancher2005
10-07-2006, 03:46 PM
I tried to access the needle on my 400ex carb and when I was removing one of the two screws on the slide, it completely stripped on me. I was able to remove the other one without a problem. There doesn't seem to be enough clearance for vise grips. Is there another way to remove this screw? Can i remove the entire slide from the carb? I'm sure someone has had this problem as the screws on this carb are famous for stripping. Thanks
400eXr1d3rZ
10-07-2006, 04:54 PM
Take a dremel and cut a deep straight line through it, use a flathead screw driver to get it out, replace them with stainless steel screws.
Rancher2005
10-07-2006, 07:10 PM
I like the dremel idea...but I really don't think that will fit into the throttle valve?
Rancher2005
10-07-2006, 09:02 PM
Does anyone know if there is a way to remove the throttle valve?
400eXr1d3rZ
10-07-2006, 10:43 PM
Wait are you talking about the screw INSIDE the carb?
Rancher2005
10-08-2006, 09:27 AM
Originally posted by 400eXr1d3rZ
Wait are you talking about the screw INSIDE the carb?

Yes, When you take the triangular brass lid off of the top of the carb, There is an arm that moves with the throttle. That arm holds a bracket attached to the needle below the throttle valve. Where the arm is attached to the throttle valve, there are 2 screws. One of those screws is stripped out. Im starting to get frustrated with it so i'm going to try needle nose pliers and turn it out

doubt it will work though but vise grips wont fit.
ImplodedMindZ
10-08-2006, 09:50 AM
You try needle nose vice grips?
Rancher2005
10-08-2006, 07:54 PM
yes i tried needle nose vise grips... they don't fit either....i did tighten the screw a little and after that was able to remove. I'd like to replace the screws with more durable stainless steel ones? Has anyone done this? I'd like to know the dimension of those screws to make it easier to find. I looked at home depot and lowes, but the second you tell them it's for a carb. they respond with "We don't do that here or We wouldn't have that here". They are so small.
Rancher2005
10-08-2006, 07:59 PM
i also looked at an oem manual to try to find the screw size with no luck. any help would be appreciated :)
ImplodedMindZ
10-08-2006, 08:12 PM
not exactly sure what screws your lookin for as im not that fermiliar w/ jetting and my carb yet but these diagrams helped me out a lil and they have some screw sizes on some of the screws hope it helps. DIAGRAM (http://216.37.204.203/Honda_OEM/HondaATV.asp?Type=13&A=107&B=22)
Rancher2005
10-08-2006, 09:16 PM
the diagram doesn't show the screw size but will allow me to show you guys where the screw is . Where #2 is in the diagram( the needle set) right above that is a small bracket. Directly above that is one of the screws I am referring to. Anyone know the make and model of carb('03 400ex) so that I may try to contact them directly?
ImplodedMindZ
10-08-2006, 10:08 PM
someone correct me if im wrong but i think KEIHIN is the carb manufacturer.
Rancher2005
10-08-2006, 10:27 PM
Originally posted by ImplodedMindZ
someone correct me if im wrong but i think KEIHIN is the carb manufacturer.

thanks
400eXr1d3rZ
10-09-2006, 06:20 PM
www.jetsrus.com has carb rebuild kits, I think they have stainless steel screws for the needle.
cals400ex
10-09-2006, 10:00 PM
take your throttle valve or your other screw with you to a hardware store and pick up two new screws that are the same.
drm416
10-10-2006, 09:21 PM
I just had this happen to me and i put back 3mm allen head bolts made them a lot easier to get to. You can probly find them at like fastenal if you have one in your area i got mine at work.