Picked up the Lifan Xpect - Page 4

TominMO · 10-13-2021, 11:12 PM

Thanx mt77, very useful advice. I'll get on it.

BTW what is that red connector that is not connected to anything?

braindead0 · 10-13-2021, 11:21 PM

Quote:

Originally Posted by TominMO

Thanx mt77, very useful advice. I'll get on it.

BTW what is that red connector that is not connected to anything?

Probably the 'make it run right' connection ;-)

mototech77 · 10-13-2021, 11:36 PM

TominMO: The red connector is the diagnostic port. You can get a Honda 6-pin to OBD2 adapter cable to interface with the ECU (not to be confused with other 6-pin adapters like the KTM’s use). I use an ELM327 clone WiFi adapter with Car Scanner app on my iPhone and it works pretty well so far. I haven’t had as much time to fiddle with it as I’d like, but I’ve been able to do things like verify that the throttle position sensor was zeroed, etc.

Braindead0: Man, I wish that were true! LOL

TominMO · 10-14-2021, 12:27 AM

Wow, thanks again mt77!

TominMO · 10-14-2021, 03:04 PM

Well, long story short, it was apparently removing the evap canister that caused my issues. When I reinstalled it, it started up immediately, no more cranking or giving it gas. Changed the oil, started the bike up to circulate said oil; immediate starting again.

Besides draining from the bottom plug (17mm socket), I also drained the left side where the screen is (24mm or 15/16" socket). I wanted to check blockage. The screen was fine.

(Never did drain the gas BTW; always do the cheap and easy troubleshooting first.)

Went for a short ride (immediate startup again) and it performed perfectly. Even took it up to 8K RPM for a second to check fuel delivery. Also no popping on decel, which it did just a little, after removing the canister.

braindead0 · 10-14-2021, 03:55 PM

Typically evap cans have a vacuum line connected to them, this is so they can 'regurgitate' the collected fuel into the intake... If you removed the evap and didn't cap off the vacuum line, that might explain the issue.

Good that you found the cause! And good job on the troubleshooting...

mototech77 · 10-14-2021, 10:23 PM

Great to hear the positive results! Sure beats having to mess with the fuel tank.

TominMO · 10-15-2021, 08:23 AM

Quote:

Originally Posted by braindead0

Typically evap cans have a vacuum line connected to them, this is so they can 'regurgitate' the collected fuel into the intake... If you removed the evap and didn't cap off the vacuum line, that might explain the issue.

Good that you found the cause! And good job on the troubleshooting...

I had connected the out line from the motor to the line going back in, bypassing the can. I thought this would effectively be the same as plugging it. Apparently not.

TominMO · 10-15-2021, 06:33 PM

17-tooth front sprocket on its way. Already have a better chain for it, and a chainbreaker.

Just bought this box for it:
https://www.amazon.com/Yescom-Motorc...318428&sr=8-12

It has a quick release that just leaves the mounting plate on the bike.

mototech77 · 10-16-2021, 07:22 AM

Nice box. I like the mounting tray setup.

When you put on the 17-tooth sprocket the front cover will be a little tricky to get back on. Will help if you can get it up on a stand and rotate the rear wheel a little to rotate the sprocket and chain to where it will clear. There are rear sprockets available for these bikes too if you want to gear up even higher. It is a bit more involved, but was worth the trouble for me.

TominMO · 10-16-2021, 09:35 AM

Thanks again mt. Helpful info.

Lifan Xpect sprockets available on Amazon below. Do not know about fitment on other brands, but if they are CG motors, I would think they would work.

Front
15 and 17 tooth available: https://www.amazon.com/JT-Sprockets-...78&sr=8-1&th=1
Rear
Lots of options: https://www.amazon.com/JT-Sprockets-...09&sr=8-1&th=1

I suspect any available aftermarket chain is gonna be better than the stock one. Just to be safe, I would not order one that was a lot cheaper than the average. I go with brand names I recognize.

TominMO · 10-16-2021, 09:55 AM

Sprocket ratios

........15..........17
34....2.27.......2.00
35....2.33.......2.06
36....2.40.......2.12
38....2.53.......2.24
39....2.60.......2.29
40....2.67.......2.35
41....2.73.......2.41
42....2.80.......2.47
43....2.87.......2.53
44....2.93.......2.59
45....3.00.......2.65
46....3.07.......2.71 stock
47....3.13.......2.76
50....3.33.......2.94

mototech77 · 10-16-2021, 11:03 AM

The JTR810 series fit the rear hub. Add a decimal for the tooth number. I installed a JTR810.38 and have the original 15t on the front. Initially I had the 17 and 38 installed but the gearing was too tall for the engine’s power band. I’m pretty happy with the 15/38 (2.533), but I may try to go just slightly taller with a 17/41 or 17/42 down the line.

TominMO · 10-16-2021, 11:19 AM

Thanks for straightening me out on the rear hub! I amended my two posts, and the one in the Lifan sprocket sticky too.

My rear sprocket is a 46, and if the front is a 15, that gives a pretty low ratio. The 17 should be an improvement for street. Once riding it, I will decide if I want higher; better top end with a slightly higher 1st gear would be great.

TominMO · 10-16-2021, 12:08 PM

1. How is the durability of the stock sprockets?
2. How long would you expect the JTs to last?

10-13-2021, 11:12 PM	#46
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 2,042	Thanx mt77, very useful advice. I'll get on it. BTW what is that red connector that is not connected to anything? __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	0

10-13-2021, 11:36 PM	#48
mototech77 Join Date: May 2021 Location: Central Florida Posts: 80	TominMO: The red connector is the diagnostic port. You can get a Honda 6-pin to OBD2 adapter cable to interface with the ECU (not to be confused with other 6-pin adapters like the KTM’s use). I use an ELM327 clone WiFi adapter with Car Scanner app on my iPhone and it works pretty well so far. I haven’t had as much time to fiddle with it as I’d like, but I’ve been able to do things like verify that the throttle position sensor was zeroed, etc. Braindead0: Man, I wish that were true! LOL __________________ 2021 Lifan Xpect EFI 2012 DF250rtc 1982 Yamaha Virago XV750 1982 Honda Twinstar CM200
	0

10-14-2021, 12:27 AM	#49
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 2,042	Wow, thanks again mt77! __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	1

10-14-2021, 03:04 PM	#50
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 2,042	Well, long story short, it was apparently removing the evap canister that caused my issues. When I reinstalled it, it started up immediately, no more cranking or giving it gas. Changed the oil, started the bike up to circulate said oil; immediate starting again. Besides draining from the bottom plug (17mm socket), I also drained the left side where the screen is (24mm or 15/16" socket). I wanted to check blockage. The screen was fine. (Never did drain the gas BTW; always do the cheap and easy troubleshooting first.) Went for a short ride (immediate startup again) and it performed perfectly. Even took it up to 8K RPM for a second to check fuel delivery. Also no popping on decel, which it did just a little, after removing the canister. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	1

10-14-2021, 10:23 PM	#52
mototech77 Join Date: May 2021 Location: Central Florida Posts: 80	Great to hear the positive results! Sure beats having to mess with the fuel tank. __________________ 2021 Lifan Xpect EFI 2012 DF250rtc 1982 Yamaha Virago XV750 1982 Honda Twinstar CM200
	0

10-14-2021, 03:55 PM	#51
braindead0 Join Date: Jun 2007 Location: Reno, NV Posts: 89	Typically evap cans have a vacuum line connected to them, this is so they can 'regurgitate' the collected fuel into the intake... If you removed the evap and didn't cap off the vacuum line, that might explain the issue. Good that you found the cause! And good job on the troubleshooting...
	0

10-15-2021, 06:33 PM	#54
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 2,042	17-tooth front sprocket on its way. Already have a better chain for it, and a chainbreaker. Just bought this box for it: https://www.amazon.com/Yescom-Motorc...318428&sr=8-12 It has a quick release that just leaves the mounting plate on the bike. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	0

10-16-2021, 07:22 AM	#55
mototech77 Join Date: May 2021 Location: Central Florida Posts: 80	Nice box. I like the mounting tray setup. When you put on the 17-tooth sprocket the front cover will be a little tricky to get back on. Will help if you can get it up on a stand and rotate the rear wheel a little to rotate the sprocket and chain to where it will clear. There are rear sprockets available for these bikes too if you want to gear up even higher. It is a bit more involved, but was worth the trouble for me. __________________ 2021 Lifan Xpect EFI 2012 DF250rtc 1982 Yamaha Virago XV750 1982 Honda Twinstar CM200
	1

10-16-2021, 09:35 AM	#56
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 2,042	Thanks again mt. Helpful info. Lifan Xpect sprockets available on Amazon below. Do not know about fitment on other brands, but if they are CG motors, I would think they would work. Front 15 and 17 tooth available: https://www.amazon.com/JT-Sprockets-...78&sr=8-1&th=1 Rear Lots of options: https://www.amazon.com/JT-Sprockets-...09&sr=8-1&th=1 I suspect any available aftermarket chain is gonna be better than the stock one. Just to be safe, I would not order one that was a lot cheaper than the average. I go with brand names I recognize. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself Last edited by TominMO; 10-16-2021 at 11:12 AM.
	1

10-16-2021, 09:55 AM	#57
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 2,042	Sprocket ratios ........15..........17 34....2.27.......2.00 35....2.33.......2.06 36....2.40.......2.12 38....2.53.......2.24 39....2.60.......2.29 40....2.67.......2.35 41....2.73.......2.41 42....2.80.......2.47 43....2.87.......2.53 44....2.93.......2.59 45....3.00.......2.65 46....3.07.......2.71 stock 47....3.13.......2.76 50....3.33.......2.94 __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself Last edited by TominMO; 05-17-2022 at 04:18 PM.
	0

10-16-2021, 11:03 AM	#58
mototech77 Join Date: May 2021 Location: Central Florida Posts: 80	The JTR810 series fit the rear hub. Add a decimal for the tooth number. I installed a JTR810.38 and have the original 15t on the front. Initially I had the 17 and 38 installed but the gearing was too tall for the engine’s power band. I’m pretty happy with the 15/38 (2.533), but I may try to go just slightly taller with a 17/41 or 17/42 down the line. __________________ 2021 Lifan Xpect EFI 2012 DF250rtc 1982 Yamaha Virago XV750 1982 Honda Twinstar CM200
	0

10-16-2021, 11:19 AM	#59
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 2,042	Thanks for straightening me out on the rear hub! I amended my two posts, and the one in the Lifan sprocket sticky too. My rear sprocket is a 46, and if the front is a 15, that gives a pretty low ratio. The 17 should be an improvement for street. Once riding it, I will decide if I want higher; better top end with a slightly higher 1st gear would be great. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	0

10-16-2021, 12:08 PM	#60
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 2,042	1. How is the durability of the stock sprockets? 2. How long would you expect the JTs to last? __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	0