My 2020 Lifan x-pect 250 Thread - Page 2

Boatguy · 03-11-2021, 08:54 PM

Quote:

Originally Posted by JerryHawk250

Get a smaller rear sprocket for a higher gear ratio.

I’m ok with the lower top speed. I want it to stay geared down for the trails.

I just have to plan out my routes up avoid high speed roads.

culcune · 03-11-2021, 10:12 PM

Quote:

Originally Posted by JerryHawk250

Get a smaller rear sprocket for a higher gear ratio.

The front is 15. A switch to a 17 should get this bike into the mid-60s to 70mph. Rear is 46 stock, and not sure if there is an easy to find replacement. I am not sure if these use the common XL185 rear hub allowing for numerous rear sprocket options. I know the front sprocket is the common Honda dirt bike (XR250?) one found all over Ebay or Amazon.

Boatguy · 03-12-2021, 02:21 AM

Quote:

Originally Posted by culcune

The front is 15. A switch to a 17 should get this bike into the mid-60s to 70mph. Rear is 46 stock, and not sure if there is an easy to find replacement. I am not sure if these use the common XL185 rear hub allowing for numerous rear sprocket options. I know the front sprocket is the common Honda dirt bike (XR250?) one found all over Ebay or Amazon.

At the sacrifice of my low end ability off road though. I’d like to keep the off road abilities intact.

I’d say it could have used a 6th gear.

There’s definitely plenty of power to get to 60-70 but it’s ok. I want that low end hill climbing and trail riding power of first gear.

**JerryHawk250** · 03-12-2021, 07:45 AM

You will be surprised that you won't lose much low end grunt with the 17 tooth on front and will be happier with the lower rpm's on top end cruising 55-60 mph. Even on my Hawk with the 17/40 combo my bike performed well off road trail riding.

Boatguy · 03-12-2021, 08:27 AM

Quote:

Originally Posted by JerryHawk250

You will be surprised that you won't lose much low end grunt with the 17 tooth on front and will be happier with the lower rpm's on top end cruising 55-60 mph. Even on my Hawk with the 17/40 combo my bike performed well off road trail riding.

Really??

I guess I can see the logic in that. Maybe the high rpm slow speed stuff off road would be less affected by a gear ratio change than the top end high speed stuff.

It makes sense that if I’m turning 5000rpm while the rear wheel is turning at a speed to move the bike 10mph, if I change the gear(chain) ratio from 3:1 to 2.7:1, that would make the bike turn at 4500rpm for the same 10mph. Not a huge difference.

Yet at high speed, say I’m turning 7000rpm to go 50mph. That’s about what I got yesterday. That was at the stock 3:1 front to rear sprocket ratio. If I change it to 2.7:1 (going to the 17 tooth), that would give me 55mph at 7000 rpm. A little more respectable. If I wind it out more after break in, I can do 60 to 65 For short times.

Ok, point taken, everyone. Thanks for the advice.

Guess that brings me to the question: where do you get compatible parts?

**JerryHawk250** · 03-12-2021, 08:34 AM

Quote:

Originally Posted by Boatguy

Guess that brings me to the question: where do you get compatible parts?

Now that a good question. All three of my bikes use the same sprocket. Maybe one of the other X-pect owners have that information for you. Take some measurements of the shaft and spline count.

JFOlivier · 03-12-2021, 10:12 AM

With the 17 drive sprocket on my Lifan I can cruise at 45 MPH at about 5000 Rpm

Boatguy · 03-12-2021, 01:20 PM

Quote:

Originally Posted by JFOlivier

With the 17 drive sprocket on my Lifan I can cruise at 45 MPH at about 5000 Rpm

Where did you get the compatible 17?

JFOlivier · 03-12-2021, 04:30 PM

I think I got it from Amazon, it goes by JTF1264.17 I do not remember the price except that it was quite cheap. It goes on quite easily, you have to move the back wheel forewardto get the chain on and it is a bit of a fiddle to get the cover back on as there is not a lot of clearance around the 17 tooth sprocket once installed.

Boatguy · 03-12-2021, 04:59 PM

Quote:

Originally Posted by JFOlivier

I think I got it from Amazon, it goes by JTF1264.17 I do not remember the price except that it was quite cheap. It goes on quite easily, you have to move the back wheel forewardto get the chain on and it is a bit of a fiddle to get the cover back on as there is not a lot of clearance around the 17 tooth sprocket once installed.

Wow!!! Awesome post! Thank you very much!

I easily found it.

Boatguy · 03-14-2021, 04:48 PM

I think I’m going to stick with the stock sprockets after all.

50 was good enough around here. The roads are pretty clear and have 4 lanes total. So, people just passed me in the passing lane if they came up behind me in the big/busy road.

And I had a BLAST in some really difficult terrain I found where it was so technical, I could have almost used an even lower gear. It was the kind of stuff you probably wouldn’t even walk through. But trucking through it in 1st in the bike was really fun and challenging. So I need that slow first gear I think. To have it, I’ll deal with the slower top end.

What the bike really needs is a 6th gear for top end. But it’s good enough.

ikeus685 · 03-18-2021, 04:06 PM

[QUOTE=Boatguy;355152]What about these tires??

They handle just fine. Road or trail.

But can I trust them to not go flat?

What I've found is Mr Tuffy puncture resistant strips.. go for the items for fat tire bicycles.. Not cheap but offering the best results.
Found on ebay and amazon.
Positioned between the tube and tire.
All tire are puncture proof.. until exposed to sharp and penetrating objects!

Boatguy · 03-18-2021, 07:53 PM

Trip is next week!! Toys are arriving!!!

culcune · 03-18-2021, 11:56 PM

I know Florida is a big state, but do you know if you are near this guy? He is quite active on Youtube. He posted this 2 weeks ago and he is discussing sprockets for his X-Pect.

Boatguy · 03-19-2021, 04:44 AM

Look at him go! 70mph at near 8000RPM. Redlining the bike. That’s not at all sustainable if you like your engine lol.

You can’t drive down a highway for hours at redline.

I’m kinda nearby to him actually. I remember he’s by lake Okeechobee. Probably an hour away by car.

The thing is, if he’s doing 70 on the top end, he’s lost the bottom slow crawl stuff I find important and turned the bike into a road bike. I like technical single track. Places you can barely walk through but that you can conquer with the bike. That’s all first gear stuff. I also like old dirt roads you can’t go more than like 30mph on. I don’t want to lose that.

What the bike REALLY needs is a better, wide range transmission. Like this Yamaha. Read half way down the article for the top speed. It has another gear which is what these bikes actually need.

https://www.topspeed.com/motorcycles...-ar165070.html

If there is a way to add a gear to the transmission I’d be down. But I don’t want to change my 2st gear crawling speed and torque.

03-12-2021, 07:45 AM	#19
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,578	You will be surprised that you won't lose much low end grunt with the 17 tooth on front and will be happier with the lower rpm's on top end cruising 55-60 mph. Even on my Hawk with the 17/40 combo my bike performed well off road trail riding. __________________ 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
	0

03-18-2021, 04:06 PM	#27
ikeus685 Join Date: Sep 2019 Location: Coastal Oregon Posts: 154	Flat proofing??? [QUOTE=Boatguy;355152]What about these tires?? They handle just fine. Road or trail. But can I trust them to not go flat? What I've found is Mr Tuffy puncture resistant strips.. go for the items for fat tire bicycles.. Not cheap but offering the best results. Found on ebay and amazon. Positioned between the tube and tire. All tire are puncture proof.. until exposed to sharp and penetrating objects!
	1

03-18-2021, 11:56 PM	#29
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	I know Florida is a big state, but do you know if you are near this guy? He is quite active on Youtube. He posted this 2 weeks ago and he is discussing sprockets for his X-Pect. __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	0

03-19-2021, 04:44 AM	#30
Boatguy Join Date: Feb 2021 Location: Northeast Posts: 929	Look at him go! 70mph at near 8000RPM. Redlining the bike. That’s not at all sustainable if you like your engine lol. You can’t drive down a highway for hours at redline. I’m kinda nearby to him actually. I remember he’s by lake Okeechobee. Probably an hour away by car. The thing is, if he’s doing 70 on the top end, he’s lost the bottom slow crawl stuff I find important and turned the bike into a road bike. I like technical single track. Places you can barely walk through but that you can conquer with the bike. That’s all first gear stuff. I also like old dirt roads you can’t go more than like 30mph on. I don’t want to lose that. What the bike REALLY needs is a better, wide range transmission. Like this Yamaha. Read half way down the article for the top speed. It has another gear which is what these bikes actually need. https://www.topspeed.com/motorcycles...-ar165070.html If there is a way to add a gear to the transmission I’d be down. But I don’t want to change my 2st gear crawling speed and torque. __________________ 2020 Lifan x-pect
	0

03-12-2021, 10:12 AM	#22
JFOlivier Join Date: Nov 2020 Location: Northern Neck of Virginia. Posts: 164	With the 17 drive sprocket on my Lifan I can cruise at 45 MPH at about 5000 Rpm
	1

03-12-2021, 04:30 PM	#24
JFOlivier Join Date: Nov 2020 Location: Northern Neck of Virginia. Posts: 164	I think I got it from Amazon, it goes by JTF1264.17 I do not remember the price except that it was quite cheap. It goes on quite easily, you have to move the back wheel forewardto get the chain on and it is a bit of a fiddle to get the cover back on as there is not a lot of clearance around the 17 tooth sprocket once installed.
	1

03-14-2021, 04:48 PM	#26
Boatguy Join Date: Feb 2021 Location: Northeast Posts: 929	I think I’m going to stick with the stock sprockets after all. 50 was good enough around here. The roads are pretty clear and have 4 lanes total. So, people just passed me in the passing lane if they came up behind me in the big/busy road. And I had a BLAST in some really difficult terrain I found where it was so technical, I could have almost used an even lower gear. It was the kind of stuff you probably wouldn’t even walk through. But trucking through it in 1st in the bike was really fun and challenging. So I need that slow first gear I think. To have it, I’ll deal with the slower top end. What the bike really needs is a 6th gear for top end. But it’s good enough.
	2