DR350 Thread

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

  1. SnoPro753

    SnoPro753 Adventurer

    Joined:
    Jan 8, 2012
    Oddometer:
    88
    Location:
    Central Iowa
    2008 and up RMZ 450 are what I purchased. I removed a lot of the backside of the panel molding with a dremel. The bottom bolt hole is mounted to a former rear peg hole, so if you have a dirt model no dice there. It takes modification to fit but I'm not the first to do it in this thread, do a search and find pics of others.
  2. MotoDane

    MotoDane 1/4 liter carb eater

    Joined:
    Nov 27, 2013
    Oddometer:
    143
    Location:
    Westby WI
    This.

    From my experience, the air/fuel variation brought on by a sizeable exhaust flow change can be very small, but can be observed. If your bike is jetted properly in the first place, the free flowing exhaust isn't going to change much... In most cases, every bike is different.

    STORY TIME

    For example, at my shop I have 2 customers that have me work on their bikes (we are an automotive shop that specializes in VW/Audi and BMW), we'll call them T and S.

    T's bike is a 1978 Yamaha XS650 (mikuni BS38s) that was a barn find that sat since 1982. I was anticipating a jetting change due to the fact that I had to use Unifilters, and he wanted slip-ons (those bottle shaped "cafe" mufflers) Much to my surprise, it didn't need any jetting changes at all, the mixture was spot on and the bike pulled nicely after it was all said and done.

    S's bike is a 1982 Honda CB-750F (Keihin VB-42s) that he bought as a poorly executed (unfinished) cafe racer project. It had pod filters and a 4-1 exhaust with a supertrapp (I think it was a Kerker system) It ran very poorly (lean) when he brought it to me. While rebuilding the carbs, among other things I eliminated the air cut valves, made the accelerator pump work, and installed a dynojet kit to make it cooperate with the pod filters. I ended up having to substitute #128 main jets for the supplied #130 mains due to it being rich. Big step from a #102 main jet, but when it was all said and done it was like a bit scary, it pulled like a rocket.

    And then there's my DR250S. It has a webcams 264 cam, KPMI valvetrain, very lightly ported head, Mikuni TM31, a Kientech header, and a DG R-series muffler that was modified to become a chambered muffler because it was too damn loud. It is extremely sensitive to backpressure changes and air density changes. When I was re-engineering the muffler I spent more time re-jetting that I did making baffles. Currently it has a #142 main jet in it and goes like hell (for a dr250), until the weather changes and then it needs to go up or down a jet size depending on what is going on... No complaints about throttle response though, I love how direct it is when it's working properly. I'm kind of leaning towards trying a Lectron carburetor just for ease of tuning and product support.
  3. thump!

    thump! Adventurer

    Joined:
    Jan 16, 2007
    Oddometer:
    5,307
    Location:
    Northeast Tennessee
    13411-14E10 available from amy Suzuki dealer for about $30. I usually order stuff like this from ronayers.com but it's probably cheaper and faster from moto-lab.com.
  4. TortillaJesus

    TortillaJesus Cockbag

    Joined:
    Dec 20, 2010
    Oddometer:
    3,814
    Location:
    Belgrade, MT
    Bless you! :pope

    I'll have your baby if you want!
  5. tkent02

    tkent02 Long timer

    Joined:
    Dec 6, 2008
    Oddometer:
    3,391
    Location:
    Littleton, CO
    Yep, we are going to require details.
    My old panels look like shit. These look pretty good.
  6. redwine65

    redwine65 Been here awhile

    Joined:
    Mar 25, 2014
    Oddometer:
    295
    they look like they would flow a lot more air, I wonder if they would work with a stock muffler?
  7. ballistic_ken

    ballistic_ken Helmet hair victim.

    Joined:
    Jun 21, 2007
    Oddometer:
    5,994
    Location:
    Farmington, NM....Great Riding
    Anyone have a stock exhaust for sale?:ear

    I have a '98 that really needs to be a bit quieter.:eek1

    PM me please.
  8. SnoPro753

    SnoPro753 Adventurer

    Joined:
    Jan 8, 2012
    Oddometer:
    88
    Location:
    Central Iowa
    Okay. Everyone loves pictures right.

    I don't have a stock muffler to compare to but here are a few pictures. And don't complain about the rust or condition of my DR350. It literally was a barn find and I'm just starting to mock up new parts before tear down and rust removal.

    Here is a picture of how much material I removed from RMZ side panel. I did it with a cutoff wheel on a dremel. Cut really easy. I have only cut one side for your convenience so you can see what the other uncut panel looks like.

    [​IMG]

    [​IMG]

    My frame is a street frame so more threaded mounting points but you guys are creative, you could make them fit on a dirt frame. I bent out the stock side panel bottom mounting point to fit the contours of this side panel. I will drill a hole in the panel here and mount a bolt.

    [​IMG]

    The airbox is why I had to trim a bunch of material from the backside. There was interference here.

    [​IMG]

    Bottom peg mount fits bottom hole on the RMZ panel fairly well.

    [​IMG]

    And a picture of the CPC of the panels I purchased.

    [​IMG]
  9. redwine65

    redwine65 Been here awhile

    Joined:
    Mar 25, 2014
    Oddometer:
    295
    Thanks for the info SnoPro have a street dr, and giant loop coyote luggage, so Im always looking for ways to combat heat build up under the side panel with a stock muffler. them things look like they might flow more air by the muffler and maybe give more room between the muffler and side panel..:1drink
  10. plugeye

    plugeye MC rescue

    Joined:
    May 11, 2007
    Oddometer:
    8,020
    Location:
    Garland, Texas USA
    i dig it. get some shots of the drive side when you can
  11. Bbbent

    Bbbent Been here awhile

    Joined:
    Jun 10, 2012
    Oddometer:
    216
    Location:
    Wisco
    Procycle also lists a billet one for the DR650 that I think fits DR350. I was going to try it, but haven't gotten around to it.

    Anybody tried that one?
    http://www.procycle.us/bikepages/dr650.html
  12. TortillaJesus

    TortillaJesus Cockbag

    Joined:
    Dec 20, 2010
    Oddometer:
    3,814
    Location:
    Belgrade, MT
    It would be nice if they would throw up the part number in the description...

    I looked at procycle and found it somewhat frustrating that they had this included on the DR650 page, minus a part number, as a alternative to replace the cable controlled plunger yet this part did not appear at all on the DR350 page- a stock part of the carburetor.. :bluduh
  13. KX50002

    KX50002 NooB, my ass

    Joined:
    Mar 18, 2012
    Oddometer:
    2,078
    Location:
    NEPA
    I have to look, I might have the stock muffler off my 91 DR350. It might be cheaper to buy one from the dealer though than to ship it from PA to NM, it weighs about 1,000 pounds :)
  14. mellephants

    mellephants loves dirtbikes

    Joined:
    Jul 21, 2013
    Oddometer:
    2,117
    Location:
    Urbana, IL
    RMZ panels look great. Thanks for the tip!
  15. Yinzer Moto

    Yinzer Moto Long timer

    Joined:
    Jun 13, 2008
    Oddometer:
    55,904
    Location:
    Pittsburgh PA
    Kouba 2" lowering links for the DR350

    I have a set $40 shipped to the lower 48. Pm me to arrange purchase. Like new, maybe 100 miles on them.


    Sent from my iPhone using Tapatalk
  16. Hario

    Hario Been here awhile

    Joined:
    Mar 23, 2011
    Oddometer:
    285
    Location:
    UK
    99 DR350SE 5lb, 5oz

    had mine out today.
  17. everready

    everready Retired!!!

    Joined:
    Jul 1, 2013
    Oddometer:
    3,465
    Location:
    Macedonia, Ohio
    Just an observation but your bike stand looks a wee bit shaky.

    Al
  18. CPAT

    CPAT Been here awhile

    Joined:
    Mar 10, 2013
    Oddometer:
    272
    Location:
    Pagosa Springs, Co
    Help! Got a new to be 1999SE that's got a toasted starter! Other than oem, has anyone found the right one through eBay, Amazon etc? Just received one sold by Amazon and it does not even resemble the one we have. I got a return from Amazon but have not gotten in touch with retailer so I thought I would ask the experienced people currently posting here. Hope someone can help me out. I think this is going to be an awesome trail bike. I'm currently a KLR guy and love the apparent simplicity of this bike. It will run with a push down my hill, but I got no one to push the old guy back up if it stalls! Pat
  19. tdrrally

    tdrrally Long timer

    Joined:
    May 16, 2008
    Oddometer:
    3,537
    Location:
    doing hard time in charleston,wv
    check out
    http://ricksmotorsportelectrics.com/results.php
  20. CPAT

    CPAT Been here awhile

    Joined:
    Mar 10, 2013
    Oddometer:
    272
    Location:
    Pagosa Springs, Co
    Thank you for the response! He does not show a picture and only show rebuilt. Guess I'll have to rebuild myself. Have found the parts on eBay, new brush plate and brushes. Pat