New Lfan Xpect 200 bucking

Freedumb4U · 08-18-2024, 03:41 AM

Hi,

Just got a new 2024 lifan xpect 200. From the get go, as soon as the engine got warm, the CEL would flash on/off and it would buck with the flashing. I contacted Lifan and they sent a new Air Temp Sensor. Installed and now it is worse. Didn't even warm up and it died and won't restart.

I have adjusted valves and plug gap from measurements found here on China Riders, so that shouldn't be the issue.

The good news is the CEL is on constant now and I have a 6 pin adapter for OB2. Bad news is my kids have my OB2 reader. Will update when I can read code. Just looking for somewhere next to start looking in the meantime. O2 sensor?

BTW, what sensor is this in the attached Pic? At first I thought it was the air temperature sensor, but realized when I got the new one it was not. I have taken that off and I'm just wondering if I might have messed something up. Thanks!

Freedumb4U · 08-18-2024, 06:26 AM

Update

So I found out the Pic I posted was a Throttle Position sensor and I had not tensioned it correctly. Oops. Now it runs, except for a buzzing noise that seems to be from the gas tank. I read there is a hose/nozzle that is causing that. Any suggestions on how to fix or do you just live with it?

Thanks!

Thumper · 08-18-2024, 09:00 AM

Fuel pump? On the KPX, the fuel pump is visible under the left side of the tank where the hose connection to the throttle body (fuel) and the power connection (12V) are easy to disconnect when removing the tank.

The fuel pump turns on when you turn the ignition on, even before you press the starter. Is that what's buzzing? That is normal, though it isn't usually very loud.

ProDigit · 08-18-2024, 01:48 PM

Yup. The only buzzing you should hear, is the fuel pump priming, which is like 3 to 4 seconds or so.

mark hall · 09-05-2024, 12:05 PM

if it's like the KPX250, they start out pretty weak idle, not much torque.. slip the clutch more than you'd like. Over like 300 miles, it picked up.. and wow.. at least 25% more power than new. I also bumped the idle speed screw just a smidge on the EFI throttle body, and now the idle torque is even better w/o much affect on the idle speed. You're mileage Will vary. Lifan's quality seems to be very good.

Davidmk123 · 08-19-2024, 10:24 AM

take a long screwdriver and slightly bend the overflow tube away from gas tank wall. seems to be a common problem with Xpect

Freedumb4U · 08-20-2024, 04:39 PM

"take a long screwdriver and slightly bend the overflow tube away from gas tank wall. seems to be a common problem with Xpect"

I think this is the correct answer. Is the Overflow tube on the inside of the tank or outside? Thanks!

Also, has anybody had a problem getting insurance for the Xpect? Progressive covers just about anything, but they won't cover this bike in Virginia. Thanks again for the input.

JFOlivier · 08-20-2024, 06:42 PM

Progressive has been covering my Expect for a number of years now and I am in the Northern Neck of Virginia.

Freedumb4U · 08-21-2024, 11:54 PM

They covered my KP mini, but not my Xpect. I went with Foremost. Not as good coverage, but only $95/year. Hope that helps in the future.

Davidmk123 · 08-22-2024, 09:43 AM

i am using Progressive in Fl. 75.00 annual for 10,000. actually is not required in Fl.

08-18-2024, 03:41 AM	#1
Freedumb4U Join Date: Aug 2024 Location: SW Virginia Posts: 4	New Lfan Xpect 200 bucking Hi, Just got a new 2024 lifan xpect 200. From the get go, as soon as the engine got warm, the CEL would flash on/off and it would buck with the flashing. I contacted Lifan and they sent a new Air Temp Sensor. Installed and now it is worse. Didn't even warm up and it died and won't restart. I have adjusted valves and plug gap from measurements found here on China Riders, so that shouldn't be the issue. The good news is the CEL is on constant now and I have a 6 pin adapter for OB2. Bad news is my kids have my OB2 reader. Will update when I can read code. Just looking for somewhere next to start looking in the meantime. O2 sensor? BTW, what sensor is this in the attached Pic? At first I thought it was the air temperature sensor, but realized when I got the new one it was not. I have taken that off and I'm just wondering if I might have messed something up. Thanks! Attached Thumbnails
	0

08-18-2024, 09:00 AM	#3
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,764	Fuel pump? On the KPX, the fuel pump is visible under the left side of the tank where the hose connection to the throttle body (fuel) and the power connection (12V) are easy to disconnect when removing the tank. The fuel pump turns on when you turn the ignition on, even before you press the starter. Is that what's buzzing? That is normal, though it isn't usually very loud. __________________ No matter where you go, there you are Last edited by Thumper; 08-18-2024 at 09:48 AM.
	2

08-18-2024, 01:48 PM	#4
ProDigit Join Date: Aug 2013 Location: FL Posts: 376	Yup. The only buzzing you should hear, is the fuel pump priming, which is like 3 to 4 seconds or so. __________________
	1

08-18-2024, 06:26 AM	#2
Freedumb4U Join Date: Aug 2024 Location: SW Virginia Posts: 4	Update So I found out the Pic I posted was a Throttle Position sensor and I had not tensioned it correctly. Oops. Now it runs, except for a buzzing noise that seems to be from the gas tank. I read there is a hose/nozzle that is causing that. Any suggestions on how to fix or do you just live with it? Thanks!
	0

09-05-2024, 12:05 PM	#5
mark hall Join Date: Sep 2024 Location: Annapolis Posts: 18	if it's like the KPX250, they start out pretty weak idle, not much torque.. slip the clutch more than you'd like. Over like 300 miles, it picked up.. and wow.. at least 25% more power than new. I also bumped the idle speed screw just a smidge on the EFI throttle body, and now the idle torque is even better w/o much affect on the idle speed. You're mileage Will vary. Lifan's quality seems to be very good.
	1

08-19-2024, 10:24 AM	#6
Davidmk123 Join Date: Jan 2021 Location: Tampa FL Posts: 18	take a long screwdriver and slightly bend the overflow tube away from gas tank wall. seems to be a common problem with Xpect
	2

08-20-2024, 04:39 PM	#7
Freedumb4U Join Date: Aug 2024 Location: SW Virginia Posts: 4	"take a long screwdriver and slightly bend the overflow tube away from gas tank wall. seems to be a common problem with Xpect" I think this is the correct answer. Is the Overflow tube on the inside of the tank or outside? Thanks! Also, has anybody had a problem getting insurance for the Xpect? Progressive covers just about anything, but they won't cover this bike in Virginia. Thanks again for the input.
	1

08-20-2024, 06:42 PM	#8
JFOlivier Join Date: Nov 2020 Location: Northern Neck of Virginia. Posts: 165	Progressive has been covering my Expect for a number of years now and I am in the Northern Neck of Virginia.
	1

08-21-2024, 11:54 PM	#9
Freedumb4U Join Date: Aug 2024 Location: SW Virginia Posts: 4	They covered my KP mini, but not my Xpect. I went with Foremost. Not as good coverage, but only $95/year. Hope that helps in the future.
	0

08-22-2024, 09:43 AM	#10
Davidmk123 Join Date: Jan 2021 Location: Tampa FL Posts: 18	i am using Progressive in Fl. 75.00 annual for 10,000. actually is not required in Fl.
	0