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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
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  #1  
Old 27 Mar 2007
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TT600R poor/difficult/impossible starting

Hello to one and all,
I am a neebie who has come on here after reading all of the good advice about starting a TT600R, especially with regard to kickstarting a 2001 model!

This has got very difficult recently and I have been following/reading all of the previous information while breaking my ankle in the past few days. I am concentrating on the fuel as the likely problem (so ignoring, at present anyway, all the equally good advice in previous threads concerning the electrics) because I have had the tank off recently and, like a fool, it was well shaken up when it was replaced: I can't be sure that this is the cause but it seems like a "good" coincidence.

So, up to now I have managed to get it going by banging away at the float bowl with the handle of a hammer while releasing the drain screw at the bottom and allowing fuel to run all over the oil tank - having got it under way and up to temperature with lots of use of the kickstart, I then adjusted the kick start decompression cable which certainly was too slack and this is now adjusted to about 1mm of clearance (when hot).

So far this has made it marginally more likely to start but only without any use of the manual choke and only after a fair bit of kicking over (perhaps 6 -10 uses of the kickstart). It used to need the choke fully out when cold and now it doesn't basically, and a "wiff" of throttle helps on occasions when it sounds like it wants to fire; everyone here says this should never be done, but "needs must".

Can I ask you all for your best advice on what needs to be fixed next and does the lack of choke mean that the bike is running rich?


Dave
ps I have a 2004 manual on cd but that does not say anything about kick starting, of course, nor anything about manual choke operation.
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Old 28 Mar 2007
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Hmmm

Almost sure it is the setting of the idle mixture screw. In front of float bowl, inside a cast-on little pipe, your little screwdriver should point upwards. Do not know the standard setting, something like 2.5 - 3 turns out. Then, adjust as necessary, see earlier posts.

Another thing to think of, what happened to it that suddenly it became so hard to start, this might be the key to the problem.

Auke
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Old 28 Mar 2007
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Hi Auke,
Thanks for your thoughts on this; as I mentioned, I "hope" this is caused by shaking the fuel tank around and getting a bit of muck in the wrong place - Been trying again today and it starts up much as I described yesterday, however today it needed about 1/4 of the choke setting to get going, after a lot of kicking (around 30 times)!
That pilot jet screw is not exactly easy to get at! I guess I need a right angle screwdriver unless you have a better idea; there are loads of pipes in the way for a normal screwdriver handle.

The bad news is that I took another look at the kickstart decompression cable (that I adjusted recently) and the bottom end came away in my hand (I have not had this bike very long, so everything on it is new to me). It does not appear to be threaded on that end so I guess it has snapped off at the kickstart connection (and it looks like a case of removing the cover plate that lies behind the general area of the footpeg to replace it - does anyone know if this is that simple?

Thanks again,
Dave
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Old 28 Mar 2007
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Easy

To change the decompression cable. Remove tank, footpeg, little cover. Shows itself.
Adjustment of mixture screw: I always use a flat screwdriver bit, like the ones they use in batterypowered screwdrivers. I explain the blisters after the adjusting to my closests by saying I poured boiling teawater over my hand.

Gd lk!
Auke
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Old 28 Mar 2007
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Thanks again for the info.

In my 2004 manual it does give the pilot screw setting as 2.75 turns out +/- 0.5, or 3 1/2 turns out, depending on which page you read!

I've been behind that little cover to find just a clevis pin on the end of the spring loaded lever and the bike is now just about impossible to kick over, so I am guessing that it snapped today.

So, I am now looking for a new decompression cable as well as a new speedo cable (I haven't mentioned that before, but it snapped on my first ride!)
Does anyone know a reliable supplier of such cables for the TT600R (online or mail order) because no one seems to carry them in stock is my experience with the speedo cable hunting to date.
Cheers

Dave
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Old 28 Mar 2007
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I used MOTOWARD, I looked at my microfiche and found it was the only blurred number on the bloody thing! I phoned them and he knew straight away which cable and popped one in the post (de-comp cable). Adjust cold to 1mm free movement as described in clymer XT manual.
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