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March 22nd, 2016, 10:13 AM   #1
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Joined: Mar 2016
From: Hurricane, UT

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I Ride: 1998 FE400
Inherited a '98 FE400

I just picked up my dad's 1998 FE400 that has been sitting in my mom's garage for the last two years since he passed away. I did a quick carb clean, cleaned the fuel tank and put on new fuel lines and got it started up the cheater way by hooking it up to a car battery. I'm pretty sure it's a new head and cylinder because I found a cracked cylinder and dinged up head in a box in the garage and I know he had some major work done on it before it sat.

Next thing I need to learn about is carbs, though. It has a Mikuni TM38 flatside on it, 220 main jet and 25 pilot jet. I brought it from sea level CA to 3000-3500 elevation southern Utah. Wondering if I should just get her started or start over with jetting. Also wondering if I should do a complete carb rebuild or just a float bowl gasket (because it's leaking like a sieve). It's missing a float bowl bolt as well, planning on finding a match at the local hardware store.

Any tips on where to start would be much appreciated!
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March 23rd, 2016, 07:29 AM   #2
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i can't help much with the Mikuni but the MJ and PJ would go down considerably at altitude. it is easier to set jetting WITH a mountain than without!

regards

Taffy
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March 23rd, 2016, 11:17 AM   #3
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I Ride: 2005 Fe450,2001 Fx470,1997 Fx600
When you take the other float bowl screws out you will notice that your regular Phillips screw driver does not fit so well and will cam out in the screw. That is because they are not U.S. spec screws, they are J.I.S. (Japanese Industrial Standard). Mikuni makes a nice carb tool kit that includes a J.I.S. screw driver or purchase a J.I.S. screw driver set or don't worry about it but it will do some damage to the screws.

If you do strip out the screws order a pair of these:
http://www.amazon.com/Vampire-Profes...s+screw+pliers

Thanks from TXThumper

Last edited by husabutt; March 23rd, 2016 at 11:49 AM.
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March 23rd, 2016, 08:37 PM   #4
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From: back in cottonwood, az

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I Ride: 04 FE650E
i should have my jetting setup for my old fe400 with a flat slide mickphooney written on the wall in the garage. ran well here at 3400 feet (however, taffy didn't like it at moab).
i'll get it in the a.m.
does it have the two petcock tank?
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March 25th, 2016, 09:19 AM   #5
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it seems for some reason, i erased it from the wall (doesn't sound like me) and left the dellorto specs. it's so faint, can't make it out except for a "240-250" (main jet?) sorry
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March 30th, 2016, 10:14 AM   #6
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Joined: Mar 2016
From: Hurricane, UT

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I Ride: 1998 FE400
She's running! I got a screw to match the float bowl and found this detailed instructional on another forum for my carb. Zilla oem carburetor cleaning/rebuild

After doing a more thorough cleaning and resetting the float height I got it to idle and rode it up and down the street a little. The pilot air screw could turn all the way out without killing the engine, so I ordered the next two sizes up of pilot jets to see where we go from here.

I also plan on ordering a few main jets of different sizes once I fiddle with the pilot jets.
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March 30th, 2016, 10:59 AM   #7
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Well done!
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March 30th, 2016, 11:23 PM   #8
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Nothing better than a free bike that runs
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March 30th, 2016, 11:54 PM   #9
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PILOT AIR SCREW?

Taffy
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May 31st, 2016, 07:12 AM   #10
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From: Hurricane, UT

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I Ride: 1998 FE400
Originally Posted by Taffy View Post
PILOT AIR SCREW?

Taffy
So I have since figured out it's a fuel screw...

Any recommendations on where to put an inline fuel filter? The filter that was in the bottom of the tank disintegrated on me and I'm having difficulty finding a replacement part. It's this same kind of setup:

http://husaberg.org/attachments/fuel...p-img_1101.jpg
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