Sp600 Stories

Discussion in 'Thumpers' started by tdrrally, May 26, 2010.

  1. RiderRat

    RiderRat thumpin!

    Joined:
    Jan 23, 2013
    Oddometer:
    14
    Location:
    Philadelphia
    Nope, very helpful, exactly what I needed to know. Wasn't sure if it was totally smooth or not. A blow torch and some more tapping and hopefully that should do the trick!

    Thanks again, I'll keep ya'll posted
  2. RiderRat

    RiderRat thumpin!

    Joined:
    Jan 23, 2013
    Oddometer:
    14
    Location:
    Philadelphia
    Sorry for all the hype over getting the axle out! With a little heat and a larger hammer got the wheel off pretty easily :clap

    After the wheel came off the new disc went on and then I took the bike to my family's foundry and got to work! The pics below are of the 1990 caliper on the vice with a new piece of steel to make up the gap from the new caliper. There's a pic of the caliper mounted and one of the before/after of the disc.
    [​IMG][/url][/IMG]
    [​IMG]

    [​IMG][/url][/IMG]

    (sorry using a poor image host, turn your head)
  3. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
    I like the last pic, you can really see a difference in size. Which parts did you end up using exactly? I noticed the dual caliper piston and steel braided brake lines. :thumb
  4. RiderRat

    RiderRat thumpin!

    Joined:
    Jan 23, 2013
    Oddometer:
    14
    Location:
    Philadelphia
    Hey!
    I used a 1990 DR650 disc and caliper that I found on ebay for a steal and with a little modification it bolted up nicely. The steel braided line was a random from my local parts store that he cut me a deal on, I'll try to look for a marking. I also have a random master-cylinder from what I think is a CRF 250 possibly?? I'm going to try to link them together and hopefully they link-up well.

    I'll keep you guys posted!!
  5. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
  6. brucifer

    brucifer Long timer

    Joined:
    Nov 27, 2007
    Oddometer:
    2,688
    Location:
    Eureka, Ca.
  7. RiderRat

    RiderRat thumpin!

    Joined:
    Jan 23, 2013
    Oddometer:
    14
    Location:
    Philadelphia
  8. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
    The tank is a 3.5-4 gallon oversize universal plastic tank. The holes are the same width as the oem petcock though. Here's a link: http://northcoastmotorsports.com/product_info.php?cPath=34_48_103&products_id=772


    BTW Does anyone have a spare set of front/ rear hubs that they would be willing to part with? I'm thinking about picking up some supermoto style rims and don't want to sacrifice the ability to switch between street and dirt tires.
  9. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
    I want to ride so badly.
  10. stussels

    stussels chupacabra!

    Joined:
    Feb 12, 2011
    Oddometer:
    140
    Location:
    c-bus ohio
    whats the hold up?
  11. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
    Well, the petcock is fubar and will not stop leaking no matter what I use. I've read up on alot of forums and found some golden things to try out but it still leaks. :cry Its leaking from the base gasket. Aside from the POS, thin gasket that came with the petcock, I've tried hi-temp black silicon, a sandwich of gaskets made from an an old motorcycle tube with a piece of glad lid in between, and the same thing instead with karropak make-a-gasket rolls. But it still leaks..

    I just acquired some loctite #2 and while its resistant to gasoline, it cures in a soft, pliable state that I'm not sure will hold up to the heat of the engine and any spills i take..
  12. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
    It looks like this gasket sealant works pretty well in petcock applications. It was pretty pliable after "drying" for the first day or two but has since grown a little harder. When one problem ends a new one begins though. My clutch is slipping and I'm having a hard time getting the clutch cover off there. It seems REALLY stuck! I have all the bolts off and I sprayed WD-40 on the kicstart shaft. Aside from hitting around the cover with a rubber mallet any suggestions for getting it off? Thanks in advance
  13. stussels

    stussels chupacabra!

    Joined:
    Feb 12, 2011
    Oddometer:
    140
    Location:
    c-bus ohio
    did ya get that one oddball bolt out thats in the middle near the oil sight glass? if so, id just keep tapping it around. mine came off with no real problems
  14. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
    COMPLETELY MISSED that bolt, wow, thanks Stussels. After that, the case popped right off. :norton Time to order a new clutch.

    -Any suggestions on clutch plates or springs? I'd like to make the clutch lever feel as stiff as I can make it. I'm looking at the EBC friction plates and the KG performance springs on Bikebandit. Are these good?

    -Should I replace the steels if they still have dimples and the bike has 13k mi.?
    -Lastly, is there any thing else I should replace while I'm in here ie. pressure plate bolts, washers...etc. out of necessity?
  15. stussels

    stussels chupacabra!

    Joined:
    Feb 12, 2011
    Oddometer:
    140
    Location:
    c-bus ohio
    i used a barnett kit that came with plates and springs. i replaced both the steels and the fibers. once you have the plates out of the basket, check that there are no grooves worn into the basket from the plates edges. if ya do, try to smooth em off somehow. if not no worries. mine didnt have any.

    i replaced the clutch plates hoping it would give me more adjustment. it didnt really. theres a real fine line on where it engages without slipping and doesnt pull with the lever pulled. mine pulls a little in gear. pisses me off kinda. i can find neutral easier now though. oh and soak those fiber plates in oil overnight before install. you probably knew that-
  16. tdrrally

    tdrrally Long timer

    Joined:
    May 16, 2008
    Oddometer:
    3,507
    Location:
    doing hard time in charleston,wv
    did you look into a raptor petcock ?
  17. stussels

    stussels chupacabra!

    Joined:
    Feb 12, 2011
    Oddometer:
    140
    Location:
    c-bus ohio
    hes got an aftermarket plastic tank. not sure if it would apply here. may be worth checking though if its still giving you problems.
  18. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
    Stussels - Sorry to hear that about your clutch. It was a little confusing, is the bike pulling forward when the lever is pulled in?? I could see that being very annoying.

    Tdrrally - Yea, I totally looked into the raptor petcock originally because it was very similar to stock, but couldn't find any made for a right-sided tank. It could never work, unless I routed the fuel tube up around my forks or something like that.

    BTW I did a small write-up with some time to kill about the NSU mod for the Sp600/Dr600. It's in my sig at the bottom.
  19. sp600

    sp600 Adventurer

    Joined:
    May 25, 2012
    Oddometer:
    59
    Location:
    Chicaga
    Quick question about the thrust washers... are they supposed to be the same size? :ear
  20. gunut75

    gunut75 Adventurer

    Joined:
    Sep 22, 2011
    Oddometer:
    86
    Location:
    Twin Lakes, WI
    You looking for the hubs from an SP600? I have a both stock wheels around. Send me a message.