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1982 XS400 (J)? - Cafe'd

Discussion in 'The Garage' started by franticvike, Apr 9, 2019.

  1. franticvike

    franticvike XS400 Member

    Aloha from the mild north pacific of Vancouver Island.

    Picked up an 82 XS400 yesterday. My first bike was an 82 XJ650 that got stolen, so when this came up locally it called out to me. That said, my 650 was all stock and this bike has been tinkered with just a touch. This is my first 400 and first modified bike.

    The whole thing looks very clean, and I'd guess a recent PO has gone through just about everything. New turn lights, battery, partial wiring. Some kind of custom seat. Starts right up, runs strong, but doesn't love being in the low RPMs, seems to bog down more easily than I remember from the 650.

    The ODO says 46k, but the frame and engine have non matching VINs and the ODO doesn't look original so I'd say that number is a guess at best. The PO who cut it up modified it listed it as 20,000 on the nose so I'd bet that was also a guess.

    Fork seems a bit on the soft side, so might look at replacing that. Since it's already been chopped up I'm not too concerned about keeping original, so if there are good suggestions for after market options I'm happy to hear them.

    PO also put on some extraordinarily loud pipes on this thing. My 650 was loud, but this is deafening. I live in a quiet residential neighbourhood and my reputation for noise -- having jackhammered 25 tons of rock out of my basement -- is already good enough so I'd like to put something much quieter on here.

    Lastly I'm wondering if there are any reasonable options for getting this thing back to being a 2 up bike. My neighbour has a welder and between the two of us we're handy enough. I'm guessing it may be more work than is wise but though I'd check. I'll be reading through everything before I come back with any specific wrenching question.

    Edit: Link to quick youtube of bike startup and working the choke


    Attached Files:

    Last edited: Apr 9, 2019
    cbrfxr67 likes this.
  2. Great bike!

    For the forks, you can try heavier weight oil (15wt?) to stiffen it up a bit. I've also upgraded to progressive springs and noticed a good improvement. More controlled in corners, and much less brake dive. Check out XS650 direct and the springs that are 24mm dia by 484mm long. You'll need a 3" spacer (PVC pipe works). I think they're the same as Progressive Springs model 11-1119. Also, your forks are missing the top caps to keep dirt and moisture out.

    The bike doesn't really have any power until it gets over 2k, so the bogging is normal to some extent. It might be the carb setup though, given that it has aftermarket exhaust. The stock exhaust is much quieter if you can find a set. Some have done 2 to 1 exhaust on this bike, I believe.

    For riding 2 up, the stock seat works fine if you can find one. It bolts down to a rear grab rail, which bolts to the frame. Not sure how much of your rear frame is left though. There are also some side plastic fairings that match the contour of the rear seat, and cover the rectifier and electronics on the left side of the bike.

    For reference, here's a shot of my bike in the mountains just past Seattle a few weeks ago.

    Attached Files:

    franticvike likes this.
  3. franticvike

    franticvike XS400 Member

    Thanks for the suggestion on the forks Jared. Will check that out.

    One other modification that I'll want to change is that po removed the side stand, so it only has center stand. Are side stands fairly standard between the xj and xs bikes from this era? Would other makes our a generic also fit easily?

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