DR350 Thread

Discussion in 'Thumpers' started by leonphelps, May 16, 2007.

  1. jmderyke

    jmderyke Miner

    Joined:
    Dec 19, 2012
    Oddometer:
    43
    Location:
    State of Jefferson
    Yeah its definitely lean at idle, the plug is grey not the coco brown im looking for, it will idle with the choke off
  2. MadChap

    MadChap Been here awhile

    Joined:
    Jan 25, 2010
    Oddometer:
    487
    Location:
    Out of Prison
    Portland, OR craigslist a guy is wanting $4200 bucks for a DR350 with 1100 original miles. Yes it's nice.......but $4200 bucks. WOW, I might think about selling mine if they are worth that much LOL.
  3. tnktm

    tnktm Adventurer

    Joined:
    Jul 19, 2005
    Oddometer:
    56
    Digging the DR

    [​IMG]
  4. heirhead

    heirhead worlds worst mechanic

    Joined:
    Jan 2, 2009
    Oddometer:
    716
    Location:
    On the water in SoCal

    2 much
  5. PHILinFRANCE

    PHILinFRANCE Long timer

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    Aug 8, 2010
    Oddometer:
    1,311
    Location:
    S W France my little bit of paradise
    Cheers Travis
    I had thought it could be a valve problem but not having a real mechanical mind i didn't fancy doing it !!!!
    Looks like i'mgoing to have to though
    Phil
  6. redleger

    redleger Horrible Mechanic

    Joined:
    Jan 16, 2013
    Oddometer:
    588
    Location:
    Tornado Alley, Oklahoma
  7. Stretch67

    Stretch67 Mad Scientist

    Joined:
    Mar 22, 2006
    Oddometer:
    8,416
    Location:
    Bent, But Not Broken
    Call Jesse and ask. He's the DR guru.
  8. MrPulldown

    MrPulldown Long timer

    Joined:
    Aug 18, 2009
    Oddometer:
    4,522
    Location:
    Truckee
    then let us know. I think it does not fit with our seat.
  9. redleger

    redleger Horrible Mechanic

    Joined:
    Jan 16, 2013
    Oddometer:
    588
    Location:
    Tornado Alley, Oklahoma
    No it's does not :( I really wanna change the look but I really don't want to paint or dye.

    Sent from my KFJWI using Tapatalk HD
  10. jmderyke

    jmderyke Miner

    Joined:
    Dec 19, 2012
    Oddometer:
    43
    Location:
    State of Jefferson
    Im looking for the stator pulse and trigger coil output voltage specs anyone have em? the clymer manual doesnt specify a/c voltage just resistance. I have the 91 dr350 with the single pickup coil.
  11. Anonawesome

    Anonawesome Scenic Rider

    Joined:
    Feb 2, 2010
    Oddometer:
    1,373
    Location:
    Head in ID, heart in OH
    Mine is currently doing the exact same thing since I've just put a pumper on. The backfiring is more likely to be caused by running rich (would explain bogging with throttle which also is happening with mine) or your ignition timing being off. I just did a top end rebuild so I'm sure by valves are dead on. I always like to check my ignition timing before messing with jetting. Although it's never a bad idea to check your valves.
  12. PHILinFRANCE

    PHILinFRANCE Long timer

    Joined:
    Aug 8, 2010
    Oddometer:
    1,311
    Location:
    S W France my little bit of paradise
    Cheers for the reply Anonawesome

    Vales and timing are next on the list , thought i'd sussed it yesterday !!! took the carb apart AGAIN ,popped out the diaphram and needle and found the small circlip NOT FIXED to the needle:eek1

    Put it all back together hoping things would be ok !!! they were better but still not right :cry

    Quick question .............can the timing JUST SLIP ???????

    Cheers all Phil
  13. dbarale

    dbarale Squiddly slow

    Joined:
    Oct 20, 2008
    Oddometer:
    1,410
    Location:
    Western NC
    Unlikely. Altough the timing chain sliders can break or the tensioner can run out of adjustment...

    But if it was running fine before sitting it's most likely carb related. Is the petcock flowing freely? Also check the air filter and the fuel filter above the needle valve seat.
  14. thump!

    thump! Adventurer

    Joined:
    Jan 16, 2007
    Oddometer:
    2,438
    Location:
    Northeast Tennessee
    Ignition timing is not adjustable. Valve/cam timing is and can "slip" if the cam chain is too loose. It would have to be pretty much worn out for that to happen though. I suspect you have a mixture problem. It also possible that your coil or spark wire is breaking down or arcing although in my experience that usually occurs under high load as opposed to high revs.
  15. slartidbartfast

    slartidbartfast Love those blue pipes

    Joined:
    Dec 23, 2003
    Oddometer:
    5,584
    Location:
    Southern Louisiana or Southern England or ...
    You absolutely CAN NOT tell the state of your idle mixture by reading a plug.
  16. cwc

    cwc .

    Joined:
    Jan 17, 2005
    Oddometer:
    1,001
    Location:
    anywhere
    I think the reason that they only give resistance is that it is easier to measure and most of the time is a reliable indicator.

    I have a 95SE which is quite different, but most CDI's operate at similar voltages.

    The "power suppy" coil on the stator on mine runs about 75-80 volts AC (rms) with the bike running. I have actually tested the CDI using 110VAC from an outlet. It works fine.

    The output of the trigger coil is a little trickier, but I hooked up an ANALOG voltmeter on the 3 volt DC range and waved a magnet by the coil. I got blips of less that ½ a volt. This will depend on the response time of your voltmeter, but it is an indicator of sorts.

    Using a digital meter (Fluke 77) for this test didn't give useful results.
  17. MrPulldown

    MrPulldown Long timer

    Joined:
    Aug 18, 2009
    Oddometer:
    4,522
    Location:
    Truckee
    Does anyone have a decomp cable and lever they are willing to part with. Too difficult to operate the the decomp with a screw driver and a pair of pliers.
  18. daverbmxer

    daverbmxer Adventurer

    Joined:
    Sep 2, 2012
    Oddometer:
    47
    Location:
    North Dakota
    I have a FMF muffler that is rattling because the rivets at the tail end are loose. Is it as simple as drilling out the old ones and riveting in new ones? Are long or short rivets better? Any danger of the end bit falling inside the muffler and working its way back into the engine?

    Edit: Thought I'd add a picture.. did a little bit of snow riding yesterday!

    [​IMG]
  19. thump!

    thump! Adventurer

    Joined:
    Jan 16, 2007
    Oddometer:
    2,438
    Location:
    Northeast Tennessee
    Keep in mind that pre-94 models use a single ignition trigger. '94 and newer has two ignition trigger pickups. The CDI on later models will only fire if the two pulses are received in the correct order.
  20. Teeeeeemu

    Teeeeeemu Been here awhile

    Joined:
    Feb 27, 2012
    Oddometer:
    104
    Location:
    Finland
    Just drill them out and possibly pick the shrapnel out. Then just new rivets. What do you mean with long or short?

    The stick part gets cut out when you pop in the rivet.
    The lenght doesnt change, only diameter as far as I know.
    Nothing should fall to the inside while installing the rivets.

    Man snow is stupid without studded tires. Couple weeks ago I went to watch a few of my friends riding on ice (Gulf of Finland) with the sun shining and not too cold. Good day.. I was the only one without studs:cry