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Old 03-01-2015, 02:45 PM   #1
danptobin OP
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Question KTM 500 EXC doesnt like to run in cold

ive got a 14 ktm 500exc with pqp exaust cone on stock muffler and exaust manifold from bdsb adjusted tps to .68 volts and it runs great a 40deg and above. in the 20s on down it wont stay running long enough to warm up. would the euro map help with this? any other ideas? at .70 volt and higher tps adj the exaust smells way to rich like a snow blower with the choke on.
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Old 03-01-2015, 05:03 PM   #2
guns_equal_freedom
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You haven't had it remapped?

First thing you should have done.
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Old 03-01-2015, 05:05 PM   #3
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>"adjusted tps to .68 volts"

IMHO: That's awful high. Way too rich ?
Adjust it to (.620 or so) and see what happens.

>"You haven't had it remapped?"

Haven't remapped mine, it works fine.
Ditto same thing on 3 more EXC's up here.
Work fine.
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Old 03-01-2015, 05:06 PM   #4
w33b8t1
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Not to state the obvious, but is the idle set high enough?
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Old 03-01-2015, 05:12 PM   #5
guns_equal_freedom
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I am in the camp that says you should remap the black box first, then play with everything else.

Everyone I know that has a 500 has remapped their bikes with the euro map and it works great.
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Old 03-01-2015, 06:23 PM   #6
danptobin OP
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Thanks

Idle is fine 40deg and above.
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Old 03-01-2015, 07:10 PM   #7
decooney
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Quote:
Originally Posted by guns_equal_freedom View Post
I am in the camp that says you should remap the black box first, then play with everything else.

Everyone I know that has a 500 has remapped their bikes with the euro map and it works great.

Yep. I'm in that camp too.

It's lean stock. Now with the exhaust opened up, more lean again. Now at 40 degrees, needs fuel. As a simple test at 40 degrees, pull the choke on, see if it runs. If it does, refer back here to guns-equal-freedom post above this one.
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Old 03-01-2015, 07:56 PM   #8
danptobin OP
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Wicked

played with idle seems improved. weather permitting ill know for sure by sat night. remap on the list though
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Old 03-01-2015, 08:17 PM   #9
Racerman27410
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choke it

rather..cold start/fast idle.

instead of turning the knob (under the tank- left hand side of throttle body) to adjust the idle....just pull the same knob straight out... it is there just for cold weather starting.

i have not needed to use it on my remapped bike but obviously your stock map requires its use when the temps drop (otherwise why even have it ?-)


my dealer showed me but its also in the owners manual.

Racerman27410 screwed with this post 03-01-2015 at 08:34 PM
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Old 03-01-2015, 08:57 PM   #10
decooney
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Same here. I had to pull the choke/fast idle out before remap on cooler days, and now I don't after remap. It's a bummer they need to set these bikes up so lean to get them them to pass. My newer EFI street bikes don't have these issues in stock form, not like this.
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Old 03-02-2015, 06:02 AM   #11
CanadianX
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Quote:
Originally Posted by Racerman27410 View Post
rather..cold start/fast idle.

instead of turning the knob (under the tank- left hand side of throttle body) to adjust the idle....just pull the same knob straight out... it is there just for cold weather starting..
Learned something ^
At first I was WTF, choke on a FI bike!?
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Old 03-02-2015, 06:14 AM   #12
RideFreak
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I never touch the fast idle, can't reach it with the larger tank. Remap & .625~.63 VDC on the TPS, FMF exhaust, desmogged. Fires right up , 30 degrees is as cold as I've run it. Anytime it's stone cold I have to hold it running for about 20 seconds then it'll idle on it's own, the rest of the day it's fine. IMO anything over .635 on the TPS and you're wasting fuel.
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