DR350 Thread

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

  1. jeep8

    jeep8 Been here awhile

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    My air/fuel screw came out one time and caused simular symptoms(popping and backfiring) at less than 4500rpm's
    It's the screw on the bottom front of the carb; I replaced it with the extended screw from keintech, has a spring and oring I think
  2. mustangwagz

    mustangwagz Been here awhile

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  3. markk900

    markk900 Been here awhile

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    Agree - but that's what I found......or at least, replacing the O rings restored the bike to normal running. I suppose one check would be to pull the choke when the problem is happening and if it gets better then lean is the problem (probably an air leak then).
  4. 2old2Bbold

    2old2Bbold was 2bold2getold

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    Is it a real back fire out the tail pipe/muffler or popping back through the intake ?
  5. jmderyke

    jmderyke Miner

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    Before you go tearing into your carb inspect your exhaust, if its loose it can be letting air into the exhaust and that gives the hot gases fresh air to ignite. This usually happens when you let off the gas with higher rpms. If its not the exhaust its most likely the carb
  6. Greg Bender

    Greg Bender Long timer

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  7. shearboy2004

    shearboy2004 KIWIINUSA

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    I agree Greg , bit of bling really .Hell I have dropped my DR so many times at speed and in some really awful places and never damaged the engine .:lol3
  8. philp38

    philp38 Long timer

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    Another noob DR350 Question. Yesterday I replaced the rear tire. Does it matter which side of the bike the axle nut is on. I looked it over and it looks no different except the locknut is now on the left of the bike instead of the right.
  9. brianjonesphoto

    brianjonesphoto Single Track Noob

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    No harm not foul. Personally I fund it much easier to get the wheel on when the axle is holding the caliper mount in place.
  10. brianjonesphoto

    brianjonesphoto Single Track Noob

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  11. philp38

    philp38 Long timer

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    Thanks.. Your right those 2 spacers and the caliper mount can be a PITA. I used a MC jack and just kept lowering it until everything lined up. :D
  12. jmderyke

    jmderyke Miner

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    I am redoing the head on my 91 dr350s and I wanted to know if anyone has redone their head with a wiseco 10.5 to compression piston and a web cam camshaft looking at there 223 grind. Im interested if theres any clearance issues thanks!
  13. Bridude

    Bridude Adventurer

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    Hi guys

    NEW DR350 owner here. I was just looking over the bike and noticed that the carb on the bike is a Mikuni. Is this stock?

    I have read a lot about the Mikuni pumper carb and was wondering if the DR came with a standard Mikuni carb as well.

    Thanks!

    Here's a pic:

    [​IMG][/URL]
    image upload
  14. RuggedExposure

    RuggedExposure Now with more rugged

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    More than likely that bike will not have the pumper carb on it.
    Looks clean though!
  15. mustangwagz

    mustangwagz Been here awhile

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    Yah i seen the german writing and was like hmmm...foreign country aftermarket parts...they always get the neat stuff! lol

    And yinz are right, they serve no purpose really, but would look neat!!...and they'd make it a one of a kind bike (Kinda?..lol)

    so ill be sure to get pics when i install them!! LOL :evil Merry Xmas to ME!
  16. RuggedExposure

    RuggedExposure Now with more rugged

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    I will have to check that out, it is possible that is has backed out.

    Not sure, but it sounds like it is coming out of the tail pipe.

    Could this cause the bike to bog down and not have power? its to the point to where it wont do anything but idle.
    The rear fender has started becoming covered in soot, making believe its running rich.
  17. RuggedExposure

    RuggedExposure Now with more rugged

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    I can't remember if those got replaced or not, but I will take it apart this weekend to see if anything looks out of place.

    I thought so too, but lately the rear fender has been getting covered with soot, making me think its running rich. Thats why I cleaned out the air filter first.
  18. mustangwagz

    mustangwagz Been here awhile

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    My harley used to make soot....it was the valve guides...it burned oil! and it wasnt slimy soot either, it was good dry black soot. (i said good, but it wasnt "GOOD"...know what i mean?) keep an eye on your oil, JUST IN-CASE!
  19. 2old2Bbold

    2old2Bbold was 2bold2getold

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    Could be ignition related, but more likely a rich condition....Choke/start valve not sealing/closing, idle air jet plugged, needle/seat leaking, one of the o-rings bad/leaking, main/idle jet loose....Bad gas/diesel :evil
  20. hajime

    hajime Been here awhile

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    It could be lean on the pilot and rich on the main jet.