21 FC250 bogging/cutting out in corners

Craig_Whitfield
I just started having this problem yesterday, it was a very hot day for the UK at 31 degrees c and I did crash but nothing major.

I went back out in the late afternoon and when tipping the bike over in left hand corner it bogged down massively and cut out then going back to the pits if I give it a few revs it would bog down and do the same.

The bike has a vortex ignition and fmf exhaust system, I have thought the power has dropped off slightly lately but maybe over thinking this.

Any advice would be great I’m hoping it’s nothing major.
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FGR01
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FGR01 7/18/2021 6:14am
7/18/2021 6:14am
How many hours? First thought is going to be clogged fuel filters.
Craig_Whitfield 7/18/2021 9:27am
7/18/2021 9:27am
FGR01 wrote:
How many hours? First thought is going to be clogged fuel filters.
Changed it probably 5 hours a go but I’ve got a few spare so might try that
Craig_Whitfield 7/18/2021 9:54am
7/18/2021 9:54am
FGR01 wrote:
How many hours? First thought is going to be clogged fuel filters.
Bikes got 30 hours on it
stone881
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stone881 7/18/2021 12:40pm
7/18/2021 12:40pm
The spark plug caps are notorious for cracking in a crash, I don't know how or why. But that might be what happened to yours if it seems like something electrical.
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Craig_Whitfield 7/18/2021 1:53pm
7/18/2021 1:53pm
stone881 wrote:
The spark plug caps are notorious for cracking in a crash, I don't know how or why. But that might be what happened to yours if...
The spark plug caps are notorious for cracking in a crash, I don't know how or why. But that might be what happened to yours if it seems like something electrical.
Thanks for this, is this just the blue rubber cap ? I would of never thought this but could be a good shout
Moto520
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Moto520 7/18/2021 2:27pm
7/18/2021 2:27pm
Is it doing that only after a long moto or is it a continuous issue?
Craig_Whitfield 7/18/2021 2:37pm
7/18/2021 2:37pm
Moto520 wrote:
Is it doing that only after a long moto or is it a continuous issue?
At the end of a long moto 30 mins, first time it’s done it
183Matt
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183Matt 7/18/2021 4:57pm
7/18/2021 4:57pm
stone881 wrote:
The spark plug caps are notorious for cracking in a crash, I don't know how or why. But that might be what happened to yours if...
The spark plug caps are notorious for cracking in a crash, I don't know how or why. But that might be what happened to yours if it seems like something electrical.
Yep. Happened to me on my 2019 FC 450. Took a while to find it, when the bike finally just wouldn’t run.
Moto520
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Moto520 7/18/2021 7:39pm
7/18/2021 7:39pm
Moto520 wrote:
Is it doing that only after a long moto or is it a continuous issue?
Craig_Whitfield wrote:
At the end of a long moto 30 mins, first time it’s done it
Common. I believe it’s from the gas getting hot but can’t prove it.
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stone881
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stone881 7/19/2021 11:13am
7/19/2021 11:13am
stone881 wrote:
The spark plug caps are notorious for cracking in a crash, I don't know how or why. But that might be what happened to yours if...
The spark plug caps are notorious for cracking in a crash, I don't know how or why. But that might be what happened to yours if it seems like something electrical.
Craig_Whitfield wrote:
Thanks for this, is this just the blue rubber cap ? I would of never thought this but could be a good shout
Yes, just the blue cap, it is about a 30 dollar part and you just unscrew the old one and screw on the new one. 5 minute job.
Rickyisms 7/20/2021 11:27am
7/20/2021 11:27am
Try wrapping the tank with thermal tape. I had a similar problem occur about 45 minutes into harescrambles on my KTM.
yz763
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yz763 5/1/2022 4:46pm
5/1/2022 4:46pm
Did you get this figured out? My 2021 350 SX with a Vortex just started doing this at a hare scramble today. The bike ran great in practice but the whole race it would bog on the low end of third and fourth gear. My first thought is to recalibrate the TPS but I’m not sure.

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