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Triumph SuperSports Triumph Four-Cylinder Enthusists: TT600, Speed4, and Daytona 600/650

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Old 12-04-2012, 08:20 AM   #1 (permalink)
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Main Motorcycle: '00 TT600
 
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TT600 Sound help!

2000 TT600 all stock
Help!
Short version- a new sound (kind of a tick mixed with an air sucking kind of sound) between 2000-5000 rpm. I am unable to locate its source. No other symptoms exist. Does not get any better or worse regardless of how the bike is driven.
Long version(get a snicker bar and a cup of coffee) –
So I decide to do an oil and air filter change, you know, keep the bike in tip top running order by performing necessary preventive maintenance. So I buy the stuff and start the oil change. Oil change done with no problems. Air filter time. So I remove the bolts holding the fuel tank down and gently lift the fuel tank up and out of the way. Its heavier than normal because a friend borrowed the bike and brought it back with a full tank…lucky me. While removing the air filter the tank slipped and something on the underside started pouring fuel everywhere. I scrambled and flipped the tank over to find that the white quick connect had broken at the threads (these items are incredibly poorly designed plastic pieces that thread into the metal baseplate of the fuel tank). So I quickly disconnected the other fuel line and the two vent lines and the fuel pump wiring harness and placed the tank gently upside down on a rag(don’t want to scratch the paint). So a trip to the motorcycle shop and 50 bucks later(and a 3 week wait) and the replacement part is in my hands ready to be installed. I grab the fuel tank off the rag and the rag sticks to it….hmmmm, upon closer inspection the fuel in the tank had apparently leaked out and soaked the rag, destroying the paint around the fuel cap. I am more than a little upset about this but I suppose I only have myself to blame. So I drain the fuel out of the tank and flip it over. Removing the plastic threads proves to be a difficult and time consuming task but about an hour later I am threading the new part into the baseplate. Finally going to be back on the road-…wrong. I bumped the red quick connect with the wrench as I snugged the white one down and it snapped off just as the white one did….I cried, I cursed, I threw things, I threw up, I got drunk, I drove to the motorcycle shop and spent another $50 on the red quick connect. 6 weeks later….(apparently it takes longer to mold the red ones???) I receive the new part and do the same thing I did with the white quick connect. Put everything back together(I think I did that part correctly but when fuel was leaking everywhere I didn’t exactly have time to draw a reference diagram) after some coaxing, she started up. And that’s when I heard the sound for the first time. It sounds like a leaf in a fan or a piece of thin plastic being beat with a fan blade, but mixed with an air sucking sound (if that makes any sense). I cannot determine where it is coming from and everything else with the bike seems to be perfect, well mechanically anyway- the paint still needs to be repaired from the fuel leak…grrr.
All I have checked seems good, starts well, runs smooth, temperature is good, but the new sound is there all the time from idle up to about 5000rpm. And after 5000 it may still be there but I can’t hear it for the engine sound. Any assistance would be appreciated, if I cannot locate the source and affect the repair then I suppose I will just have to take it to the local Triumph mechanic and see what the MC Dr. says.
Thanks for any help you can give me.
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Old 12-11-2012, 07:48 AM   #2 (permalink)
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so a noise described is difficult to ananlyze and diagnose. I uploaded a video here: http://www.youtube.com/watch?v=ep08T...ature=youtu.be
its the high pitched tick/whistle that you hear. any help will be appreciated.
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Old 12-13-2012, 05:56 PM   #3 (permalink)
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Check that all of the vacuum hoses under the tank have a home. There should be no openings on the airbox that don't have something attached to them. Also check that the airbox is firmly seated on the throttle bodies so that all of the boots are well sealed. It definitely sounds like air being sucked into the intake system. It's running too well to be a leak in the SAI (supplemental air injection) lines. That makes it run like crap.
Logic your way through it. You really can't hurt much exploring under the tank unless you're doing it with a hammer and/or diagonal cutters.
You might also try using spray lubricant like WD40 by squirting around suspected parts to see if the idle rises.


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Old 12-23-2012, 02:01 PM   #4 (permalink)
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Location: Sullivan's Island SC
Posts: 8
Turns out you were right, vacuum leak. The line coming from one of the throttle bodies to something else on the left side and slightly below the fuel rail was broken. A piece of appropriate sized rubber hose and I'm back motoring- noise free. Many thanks for your post as it have me the motivation to just get under there and start looking for problems.


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Old 12-23-2012, 08:26 PM   #5 (permalink)
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I'm glad it worked out well. Compared to a car these bikes are pretty simple to troubleshoot. The victory dance is seldom very far away.


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