starting problems with a DRZ400

Discussion in 'Suzuki' started by kadman, Dec 21, 2001.

  1. kadman

    kadman C level Member
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    My brother has a new 2000 DRZ 400E (offroad only) and sometimes it just refuses to start. Thank god it has the magic button. I don't know much about these four strokers. The first time I accused him of turning the throttle and flooding the thing. It did the same thing today and he insured me he did not touch the throttle. Any ideas????
     
  2. Mark McDonnell

    Mark McDonnell C level Member

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    I don't have any experience with 4 strokes, but there's some other things you need to narrow down.

    Does this happen when the bike is cold or hot?

    Is it after it stalls, or after you turn it off normally?

    Does it run cleanly once it starts?

    There's a whole bunch of things that can affect the starting of a four stroke. Once you can duplicate the situation you'll know what "variable" needs to be fixed.
     
  3. Andy Winters

    Andy Winters Administrator

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    I owned a 00 drz/E, it ran perfectly every time, hot or cold, I need to know the exact symptoms, how many miles the bike has, and what work has been done to it, if any.
     
  4. Michael Palmer

    Michael Palmer C level Member

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    DRZ starting

    I am a Suzuki mechanic. Nine out of ten times a DRZ is hard to start because the valves need adjustment. Don't let it go too long.

    Michael P.
     
  5. kadman

    kadman C level Member
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    The bike is pratically new. It has 69 miles of easy riding on it. The starting problem only happens cold. About three weeks back I met him for a ride and the thing would just not start. After it did it popped and cracked for a minute or so then ran fine the rest of the day. I did notice smoke coming off the header pipe after it started (flooded?????)Started up fine every time we stopped. I told him he flooded thing and to make sure he does not give it any gas when starting. He tried starting it about 5 days later and said it fired right up. We are planning to ride tomorrow and he tried to start it tonight and it would not start. He said he tried choke on, choke off, and finally give up after about 30 minutes and twisted the throttle but it still would not fire a lick. I plan on getting up early and go to his place and try and get it started. What are other symptoms of tight valves?? I know he does not want to hurt the thing. THANKS IN ADVANCE FOR THE HELP.
     
  6. Michael Palmer

    Michael Palmer C level Member

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    DRZ

    The symptoms you described point to tight valves, dirty carb (water or rust) or it could be a problem with the auto de-compression device on the exhaust cam. Pull the valve over off, check the valve clearance and check the de-compression device on the ex. cam that it moves and is not broken or sticking.

    A DRZ usually doesn't need the valves adjusted until about 2,000 miles, so the carb may be dirty. Buy some Chemtool spray cleaner remove the float bowl and blow throu all the jest with the cleaner. That carb is complicated and Chemtool will damage rubber parts. So either don't remove any jets or screws and just spray throu the jest and try it. Or take it completely apart and clean the jets and passages but remove all rubber o-rings and keep them dry.

    Good luck

    Of cpurse a new sparkplug may fix it!
     
  7. kadman

    kadman C level Member
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    Cleaned the plug this morning and after I got it all back together (little harder to get to than my 250 EXC) the thing fired right up. We went out today and it ran great all day. He has not ridden for about 15 years but he had a blast. I got to ride the thing up several hills and it seems to be a pretty good ride. I guess we will wait and see if it starts next time. Thanks
     
  8. RKNWC

    RKNWC C level Member

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    FIXIE FIXIE

    TRY TO TAKE THE AIR MIXTURE SCREW AND BACK IT OUT 1/2 TURN OR 3/4 , WE DO THAT TO MOST OF ALL BIKES BECAUSE TODAYS GAS AS THEY CALL IT IS MOSTLY OXYGENATED AND IT WILL RUN OR START LEAN EVEN IF THE CHOKE IS ON, AND THEY USUALLY RUN OR SET THESE BIKES LEAN TO PASS E P A B .S.
    GOOD LUCK
     
  9. DR.billZ

    DR.billZ C level Member

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    -Fuel screw out 2.5 turns
    -Follow cold start procedure
    -turn the idle UP!!
    -check valve clearance(especially the INTAKES) ! ! ! ! ! ! ! ! ! ! ! ! !
    when it's really cold, the bike will run on the prime(the 3-4 twists of the throttle in the cold start procedure) and then stall. Just keep doing the cold start procedure until the bike fires and stays running. Turning the iodle up helps a lot!!

    Michael Palmer, got a few questions for 'ya.
    1)What's the story on the intake valves, just soft valve material to help protect the seats? MY intakes went at about 1,500 miles and HAD to be replaced..they were very worn. I run 93 octane and pretty new fuel all the time. Did not use a lead substitute, but do now.

    2)Cam chain adjuster. The retention clip on the spring broke(at 12,000ft I might add!!) Hopefully I figured it out and got it fixed pretty quickly...~40 minutes. That was more disappointing to me than having the valves go so early. Is there a new adjuster or new spring on the newer bikes and can you buy just a spring. I've run mine ever since I "fixed" it by just bending more spring accross for a retention in the adjuster slot.

    3)return cable. they ALL break.

    more to come...............
     
    Last edited by a moderator: Dec 28, 2001
  10. Michael Palmer

    Michael Palmer C level Member

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    DRZ

    I have 2000 hard miles on my DRZ400 and just check the valve clearance yesterday. They were perfect. I have for or five friends that have DRZ400s and none have had valve troubles at all. We've sold many of these bikes where I work and have only found one that even needed the valves adjusted and he races every week and never services it. Is you bike still under warranty? If so and you have had it serviced regularly it may be covered. Suzukis don't have problems with their valves, they're pretty good stuff.

    I've not seen any problems the cam chain or any related parts.

    Mike
     
  11. RKNWC

    RKNWC C level Member

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    OOPS!!!!!

    WHEN I SAID BACK OUT AIR SCREW I MEANT FROM ITS STANDARD 1 1/2 TURN.............OR 2- 2 1/2 TOTAL
    SORRY GUY!!!!!!
     
  12. DR.billZ

    DR.billZ C level Member

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    Michael, guess I'm just "lucky". Mine's a 2000 and the valves went at about 1,300-1,500 miles or so....especially the right intake. I got a feeling most guys are checking the left intake, since it's easier to get to and assuming the right one is OK. My left intake was still serviceable, but the right one looked horrible.
    I checked the clearance regularly and they were perfect one day and needing replaced 200 miles later......the main symptom that caused me to check them so soon again......poor cold starting.
    The exhaust valves have always been spot-on!!

    My Suzkuki mechanic (of some 30 years) told me Suzuki uses soft intake valves and wasn't all that surprised to see them look that way. He said a Suzuki rep told him they do that to help protect the valve seats.............

    Thanks for the info and I'll keep using the lead substitute just to be safe.
     
  13. kadman

    kadman C level Member
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    Thanks for all the replys. I have the bike in my garage right now because my brother is out of space at his house. The weather has turned cold here in Ind. so we have not got much riding in. While in my garage goofing around I have started it several times with no issues.
     

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