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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.