08-28-2021, 02:36 AM | #16 | |
Join Date: May 2020
Location: San Antonio, Texas
Posts: 62
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Quote:
Also I would reset fuel trims (d/c ECU for a bit) since you've made mechanical adjustments to the engine.
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CSC RX4 2020 |
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08-29-2021, 10:13 PM | #17 |
Join Date: Oct 2020
Posts: 5
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Did you ever adjust the valves?
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08-29-2021, 11:54 PM | #18 | |
Join Date: Jul 2021
Posts: 15
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Quote:
I've noticed the same things with my 2021 X-Pect. It will be idling like a top, then suddenly just stall out like I hit the kill switch or something no warning at all. Other times it's idling fine and I'll grab a bit of throttle in preparation for takeoff, but it will instantly stall out instead of revving up.
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2021 Lifan X-Pect |
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09-21-2021, 08:03 PM | #19 | |
Join Date: May 2021
Location: Central Florida
Posts: 80
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Quote:
Last edited by mototech77; 09-21-2021 at 08:09 PM. Reason: Forgot last detail |
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09-21-2021, 08:05 PM | #20 |
Join Date: May 2021
Location: Central Florida
Posts: 80
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Yes, and I will probably recheck again before long based on other users’ experiences. This is a must on these bikes out of the box. Not the best manufacturing quality control
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09-21-2021, 08:06 PM | #21 | |
Join Date: May 2021
Location: Central Florida
Posts: 80
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09-25-2021, 05:32 PM | #22 |
Join Date: May 2021
Location: Central Florida
Posts: 80
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As of the last ride, since adjusting the air bypass valve to increase idle speed, I did not have any more stalling issues at warmup or thereafter (fingers crossed). The idle is a little higher than I’d like it to be (about 1900), but it beats all the stalling.
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2021 Lifan Xpect EFI 2012 DF250rtc 1982 Yamaha Virago XV750 1982 Honda Twinstar CM200 |
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09-25-2021, 06:37 PM | #23 |
Join Date: Feb 2021
Location: Northeast
Posts: 934
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Can you tell us where that bypass valve is?
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2020 Lifan x-pect |
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09-28-2021, 09:55 PM | #24 |
Join Date: May 2021
Location: Central Florida
Posts: 80
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It’s the big flathead screw on the right side of the throttle body. Unlike a carburetor that would adjust the butterfly opening (this screw is on the left side), the air bypass simply allows more or less air to circumvent the throttle plate while leaving the TPS in the same zeroed position. Adjust counterclockwise to increase flow.
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2021 Lifan Xpect EFI 2012 DF250rtc 1982 Yamaha Virago XV750 1982 Honda Twinstar CM200 |
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10-25-2023, 08:09 PM | #25 |
Join Date: Oct 2023
Posts: 46
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I realize this is an old thread but my 2023 x Pect is starting to have the same issue.
The spec plate on the side of the bike says 1500 +/- 100 rpm. Ithe bike idles steady when warmed up and doesn't skip a beat. When it's cold it is stally. I had the bike idling at about 1700 RPMs. Never had a stall issue until I adjusted it back down to 1500rpms. At 1500 it stalled once right after start up and once with a throttle crack. Might go back to 1700. Valves at 0.06mm Spark plug at 0.65mm 15w40 rotella jaso 2 certified Has anyone else messed around with it? |
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