Jaw 350 638 fix her up

Discussion in '2 smokers' started by hzoltaan, Apr 22, 2013.

  1. hzoltaan

    hzoltaan Adventurer

    Joined:
    Jan 21, 2011
    Oddometer:
    83
    Location:
    Krakow
    I have this bike since a short while and modified it a bit here and there.
    there are hughe differences to the original '89 638 modell... :wink:

    I've got a few questions what more experienced people here could answer...

    The original tire size is 3.25 18 and 3.50 18, front / rear. I have changed the rear to 130 15 and the front to 4.10 18 (for sidecar setup the wide front seemed a good idea. Now that I dropped the sidecar from it and had the feeling that the bike is "heavy" and unwilling to get into turns I changed the front again this time to 3.25 16 dunlop K550...
    Can I expect that the bike will be more agile?

    A question on brakes. As you can see this one has duplex drum on the front. How can I make it better and better? I must say, I clean it regularly, and worked on the shoes with a file, also keep the cable, the handle and other moving parts oiled, but there is allways a way to improve. I'm satisfied with the brake, comparing to what it was before, but who knows...? :)

    Here's a picture of it:
    [​IMG]

    more on http://bikepics.com/members/hzoltaan/89ts350/
    #1
  2. Tarka

    Tarka Doesn't wave back.

    Joined:
    May 10, 2007
    Oddometer:
    2,089
    Location:
    Across the pond.
    Yes,the bike will be lighter and quicker to steer with the narrower front tyre.....it will be more ''agile''.


    Regarding the brakes...are the shoes adjustable individually like on my Urals?
    If so,chalk the shoes and apply the brakes to a rotating wheel then look for full and even chalk removal....or adjust and repeat until so.
    If they`re not adjustable,maybe you can shim the feet of the shoes to compensate.
    Or maybe you just need new shoes.
    Also use a good brake cleaner solvant to degrease the drum.

    A heavy duty brake cable may also help...it did on my 650 Ural.
    #2
  3. hzoltaan

    hzoltaan Adventurer

    Joined:
    Jan 21, 2011
    Oddometer:
    83
    Location:
    Krakow
    Yes, it seems easier now. I put on the new tyre last week.

    The brakes. Fortunately I managed to fish a brutal cable for it. (wider handlebars, so the original went to the shelf) I also heard of this chalking method... with A file I can shape it can't I? Damn, It's gonna be tedious work, wheel out, chalking, wheel in, spin, break, wheel out, check, file, chalk, wheel in... :p
    #3
  4. Badboygene

    Badboygene Adventurer

    Joined:
    Jul 3, 2009
    Oddometer:
    14
    Location:
    Nash TN
    I had a Jawa just like the one pictured, and I had the same brake problem. My fix for the front was to change to a single leading shoe front brake! This helped but I never had "good" front brakes. I still joke that I had "anti locking brakes"! Good luck.
    #4
  5. Mr. Carts

    Mr. Carts Been here awhile

    Joined:
    Jan 14, 2010
    Oddometer:
    411
    Location:
    Cahuilla Mountian
    I like the nose on the side car. Looks like it is off a Studebaker.
    #5