Forum Main Tech Help/Race Shop 2017 FC450 Starting Issue

2017 FC450 Starting Issue

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prida28

Vital MX member prida28 51126 prida28 https://p.vitalmx.com/photos/users/51126/avatar/c50_F47AE651_D8EA_45EB_A8EA_9C4100B5D8A3_1620404369.jpg?1620404312 https://www.vitalmx.com/community/prida28,51126/all 02/22/16 12 2 26

Posts: 28

Joined: 2/22/2016

Location: Escondido, CA USA

10/18/2017 3:59 PM

Looking for some advice on troubleshooting a starting issue on my 2017 FC450. Occasionally (typically when I am out riding and the bike is warm) the bike just cranks and doesn’t start. I have notice that when it does start, the moment you hit the start button the lights on the map switch light up. When it doesn’t start, the lights never turn on.

I am guess there is a short somewhere or something electrical is failing, just haven’t been able to trace it down to the start button, the map switch, the kill switch or ??????

Any thoughts greatly appreciated.

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2021 Gas Gas EX450 - AEO CV’s, Pro Circuit Exhaust, RE clamps, Pro Taper bars, Vortex ECU, Dubya Haan/DID wheels (oh, and a map switch)

swtwtwtw

Vital MX member swtwtwtw 9808 swtwtwtw https://p.vitalmx.com/photos/users/9808/avatar/c50_IMG_20180213_174109_497_1519139052.jpg?1519138744 https://www.vitalmx.com/community/swtwtwtw,9808/all 04/16/08 3 44 1200 70

Posts: 1245

Joined: 4/16/2008

Location: Apple Valley, CA USA

10/18/2017 4:49 PM
Edited Date/Time: 10/19/2017 7:18 PM

My 17 fc250 did the same. I put a wps battery in and no more hesitation. I am still gonna far a lithium battery charger to keep it fresh, because I suspect that these Austrian bikes don't juice up the battery enough on their own.

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prida28

Vital MX member prida28 51126 prida28 https://p.vitalmx.com/photos/users/51126/avatar/c50_F47AE651_D8EA_45EB_A8EA_9C4100B5D8A3_1620404369.jpg?1620404312 https://www.vitalmx.com/community/prida28,51126/all 02/22/16 12 2 26

Posts: 28

Joined: 2/22/2016

Location: Escondido, CA USA

10/19/2017 3:53 PM

Thanks for the response. I finally had some time last night and did find some corrosion on the connector from the start button to the wiring harness behind the numbe plate. Not sure if this is it or not. The part that I still find puzzleing is he bike would crank but not start. So the button is working

Thanks again for suggestion.

Geno

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2021 Gas Gas EX450 - AEO CV’s, Pro Circuit Exhaust, RE clamps, Pro Taper bars, Vortex ECU, Dubya Haan/DID wheels (oh, and a map switch)

Paw Paw

Vital MX member Paw Paw 31735 Paw Paw /images/default/avatar/c50.png https://www.vitalmx.com/community/Paw-Paw,31735/all 12/24/11 1 683

Posts: 684

Joined: 12/24/2011

Location: Benton, LA USA

10/19/2017 6:42 PM

Remember that the start button also starts the fuel pump. It can crank over the engine and not start the fuel pump.

Paw Paw

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IceMan446

Vital MX member IceMan446 18573 IceMan446 https://p.vitalmx.com/photos/users/18573/avatar/c50_s780_03_011_1400602115.jpg?1400601799 https://www.vitalmx.com/community/IceMan446,18573/all 01/10/10 1 https://www.vitalmx.com/community/IceMan446,18573/setup 74 4537 10

Posts: 4611

Joined: 1/10/2010

Location: Sacramento, CA USA

10/22/2017 6:11 PM

my stock battery lasted 12 hours.

Went with the WPS bigger battery and battery box, has been fine ever since.

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CarlinoJoeVideo

Vital MX member CarlinoJoeVideo 41118 CarlinoJoeVideo https://p.vitalmx.com/photos/users/41118/avatar/c50_jessy1_1471467436.jpg?1471466703 https://www.vitalmx.com/community/CarlinoJoeVideo,41118/all 11/30/13 17 53 https://www.vitalmx.com/community/CarlinoJoeVideo,41118/setup 130 6585 53 5 2

Posts: 6715

Joined: 11/30/2013

Location: Portland/Los Angeles, CA USA

10/22/2017 8:36 PM

I just saw this online:
Photo

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prida28

Vital MX member prida28 51126 prida28 https://p.vitalmx.com/photos/users/51126/avatar/c50_F47AE651_D8EA_45EB_A8EA_9C4100B5D8A3_1620404369.jpg?1620404312 https://www.vitalmx.com/community/prida28,51126/all 02/22/16 12 2 26

Posts: 28

Joined: 2/22/2016

Location: Escondido, CA USA

10/22/2017 10:20 PM
Edited Date/Time: 10/22/2017 10:21 PM

CarlinoJoeVideo wrote:

I just saw this online:
Photo

Thanks. I definitely think it’s battery. It only seems to have problem when the bike is warm.

Going to throw charger on this week and see if next ride is any better.

Anybody know if the ktm kit fits the Husqvarna subframe? I thought they where a little different.

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2021 Gas Gas EX450 - AEO CV’s, Pro Circuit Exhaust, RE clamps, Pro Taper bars, Vortex ECU, Dubya Haan/DID wheels (oh, and a map switch)

Hcallz5

Vital MX member Hcallz5 40143 Hcallz5 https://p.vitalmx.com/photos/users/40143/avatar/c50_unnamed_1472013346.jpg?1472012471 https://www.vitalmx.com/community/Hcallz5,40143/all 08/20/13 6 1724

Posts: 1730

Joined: 8/20/2013

Location: UT, USA

10/23/2017 8:28 PM

Before you go to start the bike tap the starter for just a split second, you'll hear the fuel pump kick on for about 3 seconds then shut off. Wait until you hear the fuel pump shut off and press the starter normally. This will ensure you've got proper fuel pressure at the injector when starting.

Also may want to check your TPS, some bikes comes a bit lean from the factory and have trouble starting because of it.

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10' 200 XC-w
96' XR600r

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