DR350 Thread

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

  1. Anonawesome

    Anonawesome Scenic Rider

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    Yeah that makes more sense, and seems to be the case in this awful video that's apparently the only one that goes as in-depth as the forging.

  2. hellotimmutton

    hellotimmutton n00b

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    Is there a catalytic converter with that setup? If not, could you add one to quieten it?
  3. slartidbartfast

    slartidbartfast Love those blue pipes

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    The GSXR does not have a catalytic converter in the muffler (No vehicles do. A "cat" is a separate device, mounted in the header pipe, as close to the exhaust port as possible.) You cannot use a catalytic converter with a carbureted engine. A "cat" requires fairly precise fuel/air mixtures in order to operate correctly and would quickly plug up if used on one of our bikes. Finally, although I expect a "cat" would make the bike quieter, the additional restriction would probably hurt performance.
  4. hellotimmutton

    hellotimmutton n00b

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    If im not mistaken, some mufflers have the cat at the header end of the muffler, eg http://www.cafehusky.com/threads/decatting-the-te511-muffler.17574/
    I was not aware that you couldnt put a cat on a carb bike, thanks for the info
    Ive heard elsewhere that a cat reduces high-rpm hp but increases low-end torque, although since it wouldnt work on a carb bike its a moot point
  5. thump!

    thump! Adventurer

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    In general more back pressure favors low rpm performance and less back pressure favors high rpm performance.
  6. motolab

    motolab Long timer

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    That's kind of an old wives tale.

    Regards,

    Derek
  7. MrPulldown

    MrPulldown Long timer

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    Gonna go with Jim on this one.
  8. hellotimmutton

    hellotimmutton n00b

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    This topic led to me spending way too much time reading up on the history of cat converters. It seems that the original purpose of cat converters was to de-smog unburnt fuel but required you to run your engine rich and perhaps even run a smog line to keep it hot enough therefore increasing fuel consumption, which efi has largely made redundant, however more modern ones are more about removing other harmful components and because of the new purpose + putting them closer to the headers and therefore making them hotter by default the impact of them is significantly less (on a properly tuned engine). I doubt most people would choose to put time and money into a cat on a carbed bike and therefore lose a lot of fuel efficiency, but it might be a good idea for the select few who have done EFI conversions
  9. Friedom

    Friedom Onward and upward!

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    What do you guys think of Shinko 805s on a 350/441? Looking for something better suited for long stretches that will include pavement. Currently running full knobbies and should upgrade to something more adv friendly.
  10. TB23

    TB23 n00b

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    Can anyone tell me what tires a 99 dr350 se would have shipped with new? I am thinking my low mileage dr has the original tires, but not sure.
  11. everready

    everready Stuck in Ohio....Ugh!!!

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    It doesn't matter. If your tires are that old they need to be replaced ASAP.
  12. everready

    everready Stuck in Ohio....Ugh!!!

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    Shinko 805 have no lateral treads. My buddy ran them on his 650. He did not like them.
  13. Friedom

    Friedom Onward and upward!

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    Thanks. What do you mean though?
    [​IMG]
  14. MrPulldown

    MrPulldown Long timer

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    Since the blocks go almost all the way across with no major space between, they do not provide much cornering traction. This tire works well on big bikes that see alot of highway.
  15. Friedom

    Friedom Onward and upward!

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    Hmm
    Do you mean off road cornering traction?
    I thought that traction comes from the rubber, not the spaces. Am I over simplifying?
  16. MrPulldown

    MrPulldown Long timer

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    off road or course. Is there any other kind of riding.
    Jeff@TheQuadShop likes this.
  17. Diitteri

    Diitteri Adventurer

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    Do you guys know if the clutch friction plates from dr 650 can be used in the 350? Would guess that the 650 ones would be more durable. I installed a new clutch two years ago and it already feels like slipping :( or is there some gimmick to this? (am I doing it wrong ;) )
  18. MrPulldown

    MrPulldown Long timer

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    Have you fiddled with the clutch cable adjustment barrel at the lever yet?
    I would think that the 650 and 350 would have interchangeable clutch plates.
  19. MrPulldown

    MrPulldown Long timer

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    THanks for the feedback. I have never split a case before, and am ignorant. Now what about differences in CRANKS. Are all dr350 cranks interchangeable. Yes I am dream building from my desk.
  20. Diitteri

    Diitteri Adventurer

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    I have fiddled with the adjuster, no more fiddling room left. Is there a preferred brand or something? I previously bought regular EBC plates, perhaps heavy duty EBC would be better?