Pentora 250 Carb issues

kayzrx8 · 01-07-2024, 05:27 PM

Hi,
I just purchased a pentora 250 and the carb bogs like crazy, when its warmed up it still hesitates but not as bad and has no top end , If i apply the choke while riding partially it has a surge of power and top end and runs normally. This points to the bike running lean . I Reached out to support and they send a new carb, this one now runs good but still lacks the top end. I tried adjusting the needle under the carb but this seems like its a low speed needle as it only affected the take off performance I have an o2 sensor on the bike to monitor the afr. The top end runs very very lean and I am hesitant to ride it like this. Is there a recommended aftermarket carb that anyone recommends?

kayzrx8 · 01-10-2024, 02:31 AM

Anyone ?

**JerryHawk250** · 01-10-2024, 07:43 AM

Replace the main jet with a larger jet to richen it up on the top end.

kayzrx8 · 01-11-2024, 01:02 AM

Thanks for the reply , Is this normal? to have to re-jet a new ATV? Is this common with this 250?

**JerryHawk250** · 01-11-2024, 06:29 AM

Yes, it is common. Just about all the bikes and ATVs come tune lean in order to pass EPA approval.

GypsyR · 01-11-2024, 10:37 AM

I have a different bike but had a jet tuning kit bought and shipped to me before I even received the bike. Thanks to the heads up from multiple members of this forum. And yes, I needed to richen it up.

01-07-2024, 05:27 PM	#1
kayzrx8 Join Date: Jan 2024 Posts: 3	Pentora 250 Carb issues Hi, I just purchased a pentora 250 and the carb bogs like crazy, when its warmed up it still hesitates but not as bad and has no top end , If i apply the choke while riding partially it has a surge of power and top end and runs normally. This points to the bike running lean . I Reached out to support and they send a new carb, this one now runs good but still lacks the top end. I tried adjusting the needle under the carb but this seems like its a low speed needle as it only affected the take off performance I have an o2 sensor on the bike to monitor the afr. The top end runs very very lean and I am hesitant to ride it like this. Is there a recommended aftermarket carb that anyone recommends?
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01-10-2024, 07:43 AM	#3
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	Replace the main jet with a larger jet to richen it up on the top end. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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01-11-2024, 06:29 AM	#5
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,554	Yes, it is common. Just about all the bikes and ATVs come tune lean in order to pass EPA approval. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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01-10-2024, 02:31 AM	#2
kayzrx8 Join Date: Jan 2024 Posts: 3	Anyone ?
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01-11-2024, 01:02 AM	#4
kayzrx8 Join Date: Jan 2024 Posts: 3	Thanks for the reply , Is this normal? to have to re-jet a new ATV? Is this common with this 250?
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01-11-2024, 10:37 AM	#6
GypsyR Join Date: Feb 2023 Location: Upstate SC Posts: 271	I have a different bike but had a jet tuning kit bought and shipped to me before I even received the bike. Thanks to the heads up from multiple members of this forum. And yes, I needed to richen it up.
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