the DR650 thread

Discussion in 'Thumpers' started by sleepywombat, May 1, 2006.

  1. stretch160

    stretch160 Been here awhile

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    654
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    up-state SC
    No By dynamic sag I am refering to wht you call race sag (with the rider on board fully geared, as opposed to the forks/shock fully extended) I generaly only check static sag after I have the correct dynamic/race sag.


    before disasembly I cannot confirm what fork oil was used (it was red)
    after installing the DDC I used the 5wt fork oil recomended by Rick.

    Only Rick (Cogent) would know how the DDC valves affect spring rate and firmness.

    Stock DR650 Spring Rates:
    Stock Fork Springs: .40 kgs.
    Stock Shock Spring: . 6.5 kgs.

    <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:eek:ffice:eek:ffice" /><o:p></o:p>

    I've been communicating with rick via email and he has suggested I check for binding. If my fork springs are original than the recommended fork springs would be an even higher rate, and would be a step in the wrong direction for what I am looking for from my front suspension. The information I’m looking for now, is weather 75mm of “race sag” with completely stock forks sounds normal? This strikes me as odd, especially considering my weight (240#) and how soft the rear spring was.<o:p></o:p>
  2. Rocktown

    Rocktown Reformed

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    Great! I've been thinking about replacing the cheesy stock pegs. I'm 200 lbs and the stock ones look like they might break if I stand on them to much.
  3. stretch160

    stretch160 Been here awhile

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    I actualy pulled off the better looking grippier pegs that came with my pro-cycle lowered bracket and reinstalled the stock pegs with a 8mm spacer (a conveniently sized nut)
    [​IMG]

    this effectively moved the peg 4mm farther down and 4mm back. It sounds like a small change, but the difference is noticeable, and I can more comfortably stand and it's easier to get my boot under the shifter in its new lower position now.
  4. shu

    shu ...

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    Lots of good reasons to replace your pegs but..........I've never heard of anyone breaking the stock pegs. :ear

    ............shu
  5. BergDonk

    BergDonk Long timer

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    NO,

    100-105 mm for dirt bikes with 300 mm travel maybe. Too much for a DR and 90 mm max I reckon. 85 mm is good, with 20-25 mm static. The rule of thumb is, and has been for ever AFAIK is 10% static and 30-33% laden. That's % of available travel. Fine tune that for load variations and links if you have them.
  6. Rocktown

    Rocktown Reformed

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    Ok maybe I won't break them, but they look weak. And they have NO traction. I mean none.
  7. Slideways#96

    Slideways#96 scooter trash

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    Beautiful! Ya'll sure make some sweet products. I'll be in the market for a 950 soon. Can't wait to see what you've fabricated for the Giant Pumpkins....
  8. Adv Grifter

    Adv Grifter on the road o'dreams

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    Right you are!
    What is your explanation for the excessive static rear sag on a stock DR650?
    I've never quite figured that out. Someone from Suzuki claimed it was due to the link design. What are your thoughts?

    Those are very good rough percentages to start with, spot on.
  9. FlowBee

    FlowBee Just me.

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    Stasis.
    Agree. Pretty. That's some nice work there. I'm always in awe of the beauty of machine work. This craft took the USA to the moon and back. It's sad that we're now tolling out everything to China / India / Dumfukistan, sacrificing quality for price and disposability. Then again - does a hammer need 0.1mm tolerances ?

    More power to ya' in your endeavors. (and lose the orange... :evil).
  10. Rusty Rocket

    Rusty Rocket Life behind "Bars"

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    Usually you set the race sag and if your static sag isn't right, you have the wrong spring. Adjust accordingly.

    After setting race/rider sag if your static sag is too little, you need a heavier spring.

    Sounds counter intuitive, but if you reason it out, you'll come to the same conclusion

    In other words if you have to crank in way far to get the correct race sag. your bike won't settle the right amount when you aren't on it. With a heavier spring you don't have to crank in as much preload and the bike will settle farther, as long as it isn't too heavy..
  11. motolab

    motolab Long timer

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    I post here.

    Regards,

    Derek
  12. BergDonk

    BergDonk Long timer

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    I'm not sure its excessive with the right spring, but links are there to modify the leverage ratio that the axle applies to the spring. OTTOMH, I've think I've seen the DR link quoted as 2.8:1 AVERAGE. This is the interweb though :evil But it doesn't start or finish at 2.8 though. Some links have rising and some have falling, and some combine rising and falling changes in the ratio as they go through their travel. I haven't got or seen a plot of the DR's link.

    I should also add that the %s I mentioned above are for off road use. As you go more road and sporting they get less, say 5-10% static and 20-25% laden.
  13. dave43

    dave43 Been here awhile

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  14. Rocktown

    Rocktown Reformed

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    I can't see the left side of my bike when it is in my shop. I pulled it out today and looked at the left side and sure enough there it was 32e. Many apologies.
  15. zdiver1

    zdiver1 Been here awhile

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    :DWell I have your Brake and Clutch 3 Finger Levers and your 320 mm front disk so add me to the WARP LIST!
  16. zdiver1

    zdiver1 Been here awhile

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    I shattered my Right ankle when I was 16, I am now 52, I broke my Tibia and fibula and tore many ligaments and shattered my heal I spent 16 hours in surgery this was old school surgery back in 1978 it took me a year till I could walk with out a cane, No rehab back then. so I now use the Pivot Pegs and love the Movement I have with them my right foot has lost 30% movement:muutt. Paul.
  17. barko1

    barko1 barko1

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    Hump day, but then I'm retired. Good day, no crashing.

    Sent from my SCH-S720C using Tapatalk 2
  18. acesandeights

    acesandeights Asperger

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    Thank you.
  19. acesandeights

    acesandeights Asperger

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    Thanks guys, sounds like similar circumstance. I guess that's the way to go then.
  20. ER70S-2

    ER70S-2 Long timer

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    No chit, my heart broke when someone cancelled our space program. Getting man to the moon was the greatest achievement in mankind's history. :nod

    Yes, a hammer needs 0.001 tolerances. Merica engineers don't do metrics. :ddog

    No apologies necessary when I'm right. :freaky

    I'm tired too and spending this week in the Canyonlands, however no motorcycle. :2cry It's still damn pritty though. :nod Ok, gotta go to bed, more exploring to do tomorrow. :snore