KTM 530 EXCR- More better!

Discussion in 'Thumpers' started by neduro, Apr 3, 2008.

  1. Yardstick

    Yardstick Hydrophobic

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    This might help clear things up a bit:

    [​IMG]

    From dealing with EFI systems and data-logging, you almost always have a rich condition at idle. You will also naturally have a rich condition during acceleration since you have to pump more fuel in to make the engine accelerate! It's only during steady-state cruise that you should see something like 14.7:1 (stoichiometry) or maybe slightly leaner if you're going for increased fuel economy or have EGR available.
  2. whozaberg

    whozaberg Been here awhile

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    That's sort of correct about the pilot to main circuit transitions. But have you noticed if you drop a clip position on your needle it affects the pilot setting?

    As i wrote before. Full throttle from 3500-9000 rpm results in a fairly clean air fuel reading. Around 12.5-13.2:1 A/F.

    The problem is when cruising on light throttle or idling (Or riding tight single track) it is running at low 11:1 ratios.

    This in-turn causes overheating and uses bucket loads of fuel. Plus when riding in 30+ degree heat 11:1 ratios are way too rich. Ever tried to start a hot engine with the choke on? Same thing.

    Now the Yamahas have a hot start lever which allowed excess air to enter the fuel stream GREATLY aiding in hot start conditions. But since KTM's don't have this, mixtures at closed throttle (idle) would surely need to be in the high 13's at least.

    I could keep dropping pilot jet sizes but as you mentioned the transition to main will start to get out of hand.

    What I know for sure is a 600 hp Blown V8 under full load runs 11.8:1. Not a 530 idling/cruising.

    Also there is a lot of bottom end and mid range left untapped due to these rich mixtures.
  3. whozaberg

    whozaberg Been here awhile

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    I can understand rich conditions with EFI, but that maybe to account for accelerator pump delays and bogging.Carb pumps are instant due to being of a mechanical nature. I would be interested to see if there is a difference in injector pulse duration when cranking to start a hot engine as opposed to idling.
  4. bikepikespeak.com

    bikepikespeak.com Been here awhile

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  5. c.vestal

    c.vestal Rally On

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  6. Deseret Rider

    Deseret Rider Been here awhile

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    Can you give us a link to the system you recommend----thanks.
  7. jesusgatos

    jesusgatos fishing with dynamite

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    It's the same rear taillight/license plate mount that came on all the 6 days edition XC-W's here in The States (might be a little easier for you to look-up).
  8. Hodakaguy

    Hodakaguy NorthWest Adventure Rider

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  9. c.vestal

    c.vestal Rally On

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  10. bikepikespeak.com

    bikepikespeak.com Been here awhile

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    Perfect. Thanks guys.
  11. Krazyjohnny

    Krazyjohnny Been here awhile

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    I just installed the Sicass Racing tailight that looks very similar to the Tusk one shown. It works great and mates to the stock bolt locations. They are a little bit more than the Tusk.
  12. Krazyjohnny

    Krazyjohnny Been here awhile

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    What is everyone running for oil in their 530s? This is my first KTM and I would like to know the tips and tricks to keep this 08' around for a while. I have done the initial fluids change since receipt of the bike and used the Motorex stuff as shown in the manual. I could not get the gear box screen out of the bottom of the case. The engine one was a chore, but did not have any stuff on it.
  13. Hodakaguy

    Hodakaguy NorthWest Adventure Rider

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    That's a loaded question. Religion, Politics and Oil discussions will get you in big trouble :deal

    Here's my 2 Cents. For years I've ran Mobile-1 15-50W for high performance engines (the bottle with the race flags on the bottom corner) in all my bikes. One of the bike mags did a oil shootout years ago where they sent a bunch of oils out for anaylsis, the Mobile-1 15-50W was one of a couple auto oils that they included in the shootout. The results showed it VERY similar to all the bike oils with extra anti-wear, corrosion additives etc.

    Most of the guys I ride with have been running that oil as well with excellent results. I chose it because it was a proven oil, cheap ($23 per 5 quart container at WalMart), and available everywhere (I like oil I can easily get when on distance trips and don't like mixing brands). Any modern properly rated oil will be fine...you just don't read about oil related failures any more. Pick which ever oil gives you that warm fuzzy feeling inside and go with it :D

    Hodakaguy
  14. FlyingDutchman

    FlyingDutchman Dirt Biker

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    No religion or politics involved. Change your oil often, every ride and measure it. Your concern shouldn't be oil breakdown--it's the dirt & moisture that gets in that will cost you $. I agree Mobil 1 15-50 is the cheapest synthetic and any 10-40 oil will do for short 1 day rides. JASO MA spec'd oil or gear oil in the trans will do.


    By the way 2, I finished the Corduroy Enduro on my second try, both aboard the 530. Only 1 of 2 530's entered that I know of. It's more than a dualsport. My riding has come a long way in 2 years since the KLR was replaced:clap
  15. Enecosse

    Enecosse Adventurer

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    Hi, first post really enjoyed this thread. If you have a problem starting due hot engine rich mixture and also some other situations an old trick is to turn the fuel off, press the starter, when the engine starts turn the fuel on. This from my days of riding old British bikes and Amal carbs.
  16. Krazyjohnny

    Krazyjohnny Been here awhile

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    Thanks guys for the input on the oil. I loike the Mobil 1 stuff because it is readily available and I can buy it in a large container. The Motorex stuff was $75 (Ouch!) a gallon sized jug at Cycle Gear. I want to run the same oil in all of my stuff because I just want to keep things as simple as possible. I watched the video of the oil change on the HT cooler and noticed she used Rotella T. That is what I have used in my diesel truck for the past 12 years and never done any more to that truck than change oils and wear items. So seeing that I just knew there were some options I should research. Thanks for all of your insight and knowledge. Hopefully I can return some of that as I learn some more.
  17. FlyingDutchman

    FlyingDutchman Dirt Biker

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    I have had similar experience...I think hitting the starter with choke out with the fuel off is my actual recipe...FWIW
  18. trailjammer

    trailjammer Been here awhile

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    Is this the tail light kit that's also known as the European Tail Light Kit?
  19. Krazyjohnny

    Krazyjohnny Been here awhile

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    I think I am going to add some exhaust wrap to my header so I lessen the chances of burning my self. Has anyone done this or have any recommendations for or against it?
  20. FlyingDutchman

    FlyingDutchman Dirt Biker

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    I'd probably go with a guard of some type to toughen it up as they can get dented- as mine is. The guard will probably be a bit lower temp.