DR350 Thread

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

  1. Anonawesome

    Anonawesome Scenic Rider

    Joined:
    Feb 2, 2010
    Oddometer:
    1,373
    Location:
    Head in ID, heart in OH
    I'm saying that the changes made within that range have never been worth the trouble of messing with it. It usually makes no difference so it is simply a step that I now skip. Not to mention that I have never once found the fuel level to be the cause of an issue.
  2. Rich667

    Rich667 Been here awhile

    Joined:
    Jan 10, 2011
    Oddometer:
    179
    Location:
    Dauphin, PA
    what carb is it, the pumper or the cv?
  3. mustangwagz

    mustangwagz Been here awhile

    Joined:
    Apr 8, 2012
    Oddometer:
    247
    Location:
    Western PA
    CV...oops shoulda posted that eh? my bad
  4. daverbmxer

    daverbmxer Adventurer

    Joined:
    Sep 2, 2012
    Oddometer:
    47
    Location:
    North Dakota
    What is a good mid range chain and sprocket set? I think I want to gear my '91 at 14/43 for driving around this God forsaken flat land in North Dakota. Will probably get a 12 tooth for the front to swap in for weekend off road trips and what not.

    I know that DID is a good brand for chain.. unsure what other brands are good. I don't want to spend an arm and a leg.. ideally under $120 for both sprockets and chain. If someone could link me to a good kit or components that would be great.

    Is the 14/43 going to possibly be too highly geared for ATV trails?
  5. Schneiderman

    Schneiderman Adventurer

    Joined:
    Mar 4, 2008
    Oddometer:
    13
    Location:
    Long Island, NY
    I was trying to remove the case saver bolts in order to re-install the front sprocket guard that the PO had removed, but included with the bike when I bought it. The lower case saver bolt snapped... Upper one did not give me any problem.

    Is there anything important I need to know about that lower bolt before I take an ez-out to it?
  6. Greg Bender

    Greg Bender Long timer

    Joined:
    Oct 22, 2007
    Oddometer:
    1,378
    Location:
    Cave Creek, Arizona, United States
    That all depends on the ATV trail. I've seen some that are quite easy. Others extremely steep and nasty.

    On my 1993 model, I can get away with 15/41 for pavement and fairly mild dirt hills. I'll drop a tooth or two on the counter sprocket for the more gnarly stuff.

    I've had really good luck with the inexpensive Primary Drive brand of chain and sprocket that Rocky Mountain ATV sells. Here are some links to consider:

    http://www.rockymountainatvmc.com/p/43/53/222/957/-/-/1263/

    http://www.rockymountainatvmc.com/p/43/53/222/957/-/-/1385/

    http://www.rockymountainatvmc.com/p/43/53/222/958/-/-/35559/

    Don't forget a spare one of these:
    http://www.rockymountainatvmc.com/p/43/53/222/958/-/-/35566/

    I hope this helps!

    Regards,

    Gregory Bender
  7. Greg Bender

    Greg Bender Long timer

    Joined:
    Oct 22, 2007
    Oddometer:
    1,378
    Location:
    Cave Creek, Arizona, United States
    No, although - personally - I would never, ever use an easy out. Instead, I would weld a nut onto it and remove it that way. In my experience, an easy out is a good way to make a bad situation much worse. YMMV.

    Regards,

    Gregory Bender
  8. 2old2Bbold

    2old2Bbold was 2bold2getold

    Joined:
    Dec 10, 2011
    Oddometer:
    2,345
    Location:
    DFW TX
    I agree with Greg. That bolt is a 6mm. If you break off a small easy out in there, your screwed. If there's not enough left to weld on a nut, try drilling it out. Be very carefull to get the hole in the center. Lay it on it's side and go slow. If you have a reverse twist drill bit, sometimes the bit will unscrew it as you drill. Use progressively larger bits untill you get very close to the alloy, then try a 6x1 mm tap. Sometimes the little bit that's left will come out. Be careful, easy outs and taps are brittle. Big trouble if it breaks off. If all else fails, you can get it tig welded, and redrill and tap.
  9. MrPulldown

    MrPulldown Long timer

    Joined:
    Aug 18, 2009
    Oddometer:
    4,479
    Location:
    Truckee
    Did not have very much luck getting the spare bike running this weekend.
    About two months ago I got the bike started by rolling it down the street and popping the clutch. Start after the engine turned over only once. Got it home and was able to kick start it. Great, went and parked it.
    Friend was over this weekend so we tried to get the bike rideable. New cables, fixed flat tires, grips, fixed the kick stand rub, levers, buttoned down the seat and gas tank, speedo cable, decomp lever and cable, checked the valve clearance (lose so I am getting full compression). Try to start it but it would not. Took about half a mile of bump starting it before it would go. Towing behind my truck up the hills so that I could bump it going down. Ran horribly when it did. Would buck so hard in the begining it would almost throw me off. Would run better with the choke on. However the chcok would not stay in place. All stock airbox and jeting for a 250 (as far as I could tell). It really pissed me off. We never did get a motorcycle ride in together.
    Now I am scratching my head wondering now what.
    I still can't figure out how to top out the kick starter to get a full stroke out of each kick.
    [​IMG]
  10. rubberband

    rubberband Will ride for tacos

    Joined:
    Jul 16, 2010
    Oddometer:
    460
    Location:
    Michigan
    For Airvent...and the rest of you....couple of shots from a recent trip to Deals Gap & surrounding areas. Killboy shot later...

    Stock SE suspension....check
    [​IMG]


    Top of the Cherohala Skyway
    [​IMG]
  11. Airvent

    Airvent Been here awhile

    Joined:
    Feb 16, 2009
    Oddometer:
    353
    Location:
    Oxford, Connecticut
    NICE! :freaky:freaky
  12. a1fa

    a1fa Throttle Jockey™

    Joined:
    Nov 1, 2006
    Oddometer:
    14,579
    Location:
    Arkansas
    Do you have the manual decompression lever?

  13. Richklr650

    Richklr650 Been here awhile

    Joined:
    Aug 6, 2010
    Oddometer:
    175
    Location:
    Dudley ma.
    hey gang what are you guys using to replace the stock vacum valve on a 93 350s thanks as soon as i get this thing up and running like it should ill post some pics thanks Rich
  14. cwc

    cwc .

    Joined:
    Jan 17, 2005
    Oddometer:
    988
    Location:
    anywhere
    Greg,

    Do you keep records of how long the chains last?

    I've been using RK chain with JT sprockets and generally average 8K miles from a set.
    The chains usually develop stiff spots that I might be able to ignore, but I put on new if going on a trip of some length.
    Most of my use is on really bad dirt roads in northern Mexico with river crossings and polvo that submerge the chain and paved and gravel road use around home.
  15. Anonawesome

    Anonawesome Scenic Rider

    Joined:
    Feb 2, 2010
    Oddometer:
    1,373
    Location:
    Head in ID, heart in OH
    Sounds like a timing issue. Has it done this since you got it? Or have you done any top end work? It's easy to not put the cam back in the right position.

    The kickstarter issue is because the spring that pulls the lever back up is set up improperly. I did the same thing to mine when I took the kickstart mechanism apart because the "ratcheting" mechanism was not properly catching every time. I just stretched out the spring a little. Unrelated to your problem, you need to figure out what will wind up the spring a little more. I still haven't fixed mine, but I'm sure it can't be that difficult to troubleshoot it.
  16. Greg Bender

    Greg Bender Long timer

    Joined:
    Oct 22, 2007
    Oddometer:
    1,378
    Location:
    Cave Creek, Arizona, United States
    Hi Charlie,

    I have not kept careful track. When I take day rides, I just lube and go. I never clean the chain other than whatever indirect blast it might get when I wash the bike. So, I really have not been trying to get the most out of a chain. Like you, I ride a lot of dusty, rocky, really bad "roads" here in Arizona. I don't see much in the way of submersion in river crossings, but I do get them splashed pretty much every ride.

    The previous chain I used was this one with the primary drive sprockets:
    http://www.rockymountainatvmc.com/p/43/53/222/958/-/-/195432/

    I do have purchase records: I purchased the RK chain and sprockets Aug 16, 2010. I purchased the replacement Primary Drive chain and sprockets Aug 13, 2012. That RK o-ring chain lasted me right at 2 years...about 12,000 miles at my current 6,000/year usage. When I was riding home on a long trip, that RK chain was spent and loose. I used it up good and proper.

    I suppose that is pretty good mileage for a mistreated chain. I'm sure street riders would scoff, but since I ride shaft drive Guzzis, I have no idea how long a street chain is supposed to last. For the cost of a replacement chain and sprockets, I'm honestly not all that concerned about getting more than 10 - 12 thousand miles out of it.

    Regards,

    Gregory Bender
  17. 2old2Bbold

    2old2Bbold was 2bold2getold

    Joined:
    Dec 10, 2011
    Oddometer:
    2,345
    Location:
    DFW TX
  18. mustangwagz

    mustangwagz Been here awhile

    Joined:
    Apr 8, 2012
    Oddometer:
    247
    Location:
    Western PA
    Holy cow, called yesterday to speak with them about jetting suggestions, janet told me EVERYTHING i wanted to know, plus stuff i didnt know. haha. So thats great customer service! order my longer fuel screw from them, once gregs o ring kit gets here, and my carb rebuild kit, ill be tearing into the bike to install the 140 main jet and the adjustable needle...

    Now for yinz's help...my aftermarket needle that came with the parts carb has 6 positions...currently in the 4th from top position. Keintechs has 5 notchs... they run in middle she said. Anyone got suggestions for me? Janet said leave it in 4th postion and try it..was just curious if anyone else had run into a 6 position needle along their way?
  19. rubberband

    rubberband Will ride for tacos

    Joined:
    Jul 16, 2010
    Oddometer:
    460
    Location:
    Michigan

    If you read your post....you answered your own question...
    Run it just like J &J Kientech says...you'll be happy.

    I always thought it was Yunz...my grandparents lived in Pittsburgh.
  20. FireDog45

    FireDog45 Mid-life crisis sufferer

    Joined:
    Sep 16, 2006
    Oddometer:
    1,048
    Location:
    Central, Ohio
    +1 Start where Jesse/Janet suggest and go from there. I was having some hot start issues after rebuilding my carb with Jesse's kit. Called him up and found out I had mis adjusted the idle mixture screw. Reset it and so far so good.