JerryHawk250's Lifan KPX250 - Page 32

IdahoRider · 01-29-2023, 01:27 PM

Quote:

Originally Posted by joefj1200

Notes on a Shinko 705 4.10-18 rear tire mounted on a KPX 250:

~0.8" smaller diameter than stock, so lowers the rear of the bike ~0.4".
~0.4" narrower than stock.
Weighs a significant ~2.2 lbs. less.

6000 RPM in 6th gear, ~60 MPH with stock tire
6000 RPM in 6th gear with, ~54 MPH with Shinko 705

Cost $83.16 delivered. I mounted and balanced it myself. Took 1.25 oz. to balance.

Feels pretty good in the first test ride...

More to come...

I'll be curious to hear how well they work, the tread pattern is so similar to stock.

kyle · 01-29-2023, 02:12 PM

Quote:

Originally Posted by joefj1200

Notes on a Shinko 705 4.10-18 rear tire mounted on a KPX 250:

~0.8" smaller diameter than stock, so lowers the rear of the bike ~0.4".
~0.4" narrower than stock.
Weighs a significant ~2.2 lbs. less.

6000 RPM in 6th gear, ~60 MPH with stock tire
6000 RPM in 6th gear with, ~54 MPH with Shinko 705

Cost $83.16 delivered. I mounted and balanced it myself. Took 1.25 oz. to balance.

Feels pretty good in the first test ride...

More to come...

Great info, mind if I share on kpx250com?

joefj1200 · 01-29-2023, 03:01 PM

Quote:

Originally Posted by kyle

Great info, mind if I share on kpx250com?

I don't mind at all.

joefj1200 · 01-29-2023, 03:03 PM

Added 20mm bar risers, primarily to make room to slide the forks up in the triples...

I ordered these from Amazon, $16.88 delivered. They fit great:

https://www.amazon.com/dp/B07TWFH33Y?ref=ppx_yo2ov_dt_b_product_details&th=1

joefj1200 · 01-29-2023, 07:32 PM

Quick street ride with the new Shinko 705 4.10-18 rear, with the front forks slid up in the triples ~0.400":

The differences are subtle but noticeable. Some small positive changes, minimal cost, and no downsides, at least for how I'll be using the bike.

What was I trying to accomplish? To lower the seat height slightly to make it more friendly for shorter, less experienced riders, without major cost, and fully reversible. What did I accomplish?

* Lowered the seat height and center of mass almost 1/2". My wife claims she can't tell the difference, but I can tell she can handle it a little better at a stop.
* reduced the rear tire weight by over 2lbs. The bike should accelerate incrementally faster, and less unsprung weight improves compliance over bumps.
* raised the bars relative to the seat by 20mm. Should be more comfortable for me when standing on the pegs.
* Effectively lowered the gearing for better or worse.

Cost me a total of $100.04, and my time to install the tire and bar risers.

Potential downsides, at least in theory:

* I lost 1/2" of ground clearance. I can afford that. I ride 90% street, 10% gravel roads.
* I lost some small amount of cornering clearance. If I start dragging pegs I'll consider that problem when I get to it. Then it might be time for stiffer springs.
* Rear tire is slightly narrower. Anywhere I was going to go on the stock tire, I can go on this one...
* Effectively lowered the gearing for better or worse.

Riding the bike on the street it feels ever so slightly lower, but also maybe more "planted". It maybe feels a little less clumsy at slow speeds and going into slow corners. It feels great going into 50-60 MPH corners. I think it will feel better for gravel roads, and the kind of light trail riding I'll do on the bike. It's definitely feels better for street riding.

The main thing I notice is the lower gearing as a result of the smaller diameter rear wheel. I have a 14-tooth sprocket I'll install this week and see where that gets me. I can pick up a slightly smaller rear sprocket if I'm then geared too tall...

So at this point, I'm totally happy with the results. YMMV...

Attached photo of my bike with the new rear tire and lowered front.

joefj1200 · 02-01-2023, 04:21 PM

Quote:

Originally Posted by joefj1200

Notes on a Shinko 705 4.10-18 rear tire mounted on a KPX 250:

~0.8" smaller diameter than stock, so lowers the rear of the bike ~0.4".
~0.4" narrower than stock.
Weighs a significant ~2.2 lbs. less.

6000 RPM in 6th gear, ~60 MPH with stock tire
6000 RPM in 6th gear with, ~54 MPH with Shinko 705

Cost $83.16 delivered. I mounted and balanced it myself. Took 1.25 oz. to balance.

Feels pretty good in the first test ride...

More to come...

Swapped in the 14 tooth front sprocket and went for a quick ride. I was surprised to find it's still geared slightly shorter than stock.

6000 RPM in 6th gear, ~60 MPH with stock tire and front sprocket
6000 RPM in 6th gear, ~54 MPH with Shinko 705 and front sprocket
6000 RPM in 6th gear, ~58 MPH with Shinko 705 and 14-tooth rear sprocket.

IdahoRider · 02-22-2023, 01:18 PM

Quote:

Originally Posted by JerryHawk250

I just sent them an email asking about it. Just waiting on a replay.

Did you ever get a response from Venom? (When you inquired about replacement air filters)

**JerryHawk250** · 02-22-2023, 01:23 PM

Quote:

Originally Posted by IdahoRider

Did you ever get a response from Venom? (When you inquired about replacement air filters)

Oh i guess i didn't post it. lol You can request for the air filters from Vemon or contact American Lifan direct. contact@americanlifan.com
American Lifan does have them in stock.

IdahoRider · 02-22-2023, 02:03 PM

Thanks!

IdahoRider · 03-01-2023, 03:41 PM

Quote:

Originally Posted by JerryHawk250

Venom motorsports doesn't have the filters listed on there site yet. You can call them to order though.

Venom just quoted me $49.99 + Free shipping. Pretty spendy for a China bike. May look into making a foam filter by removing the paper from the stock filter and replacing it with foam when the time comes. Mine still looks good after 2800 miles.

TominMO · 03-01-2023, 03:49 PM

Quote:

Originally Posted by IdahoRider

Venom just quoted me $49.99 + Free shipping. Pretty spendy for a China bike. May look into making a foam filter by removing the paper from the stock filter and replacing it with foam when the time comes. Mine still looks good after 2800 miles.

You can also extend the life of a paper filter by vacuuming it with the crevice attachment to get between the pleats. Did that to my car's engine and cabin air filters and they look almost new.

**JerryHawk250** · 03-01-2023, 04:18 PM

Quote:

Originally Posted by IdahoRider

Venom just quoted me $49.99 + Free shipping. Pretty spendy for a China bike. May look into making a foam filter by removing the paper from the stock filter and replacing it with foam when the time comes. Mine still looks good after 2800 miles.

You can order direct from American Lifan for about half that price.

Zapkin · 03-14-2023, 01:18 PM

I am curious if anyone has compared the EFI components on the KPX to those of the XPect. I was wondering if they are similar.

Jay93 · 03-26-2023, 07:32 PM

Hey guys! So due to a questionable $35 lever set I now need a new clutch cable. Felt a bit of a grinding in my lever and discovered about three quarters of the braided steel clutch cable had sheared clean through, so fun! Does anyone know how to disconnect the clutch cable from the transmission end? I’ve been looking at it and I’m afraid to get access I’ll need to remove the exhaust. Any input from anyone is greatly appreciated!! 5700mi on my kpx so far and running smooth as butter!

**JerryHawk250** · 03-27-2023, 10:44 AM

Yeah, it's pretty tight quarters. More than likely you will have to remove the header pipe.

02-22-2023, 02:03 PM	#474
IdahoRider Join Date: Aug 2022 Posts: 174	Thanks! __________________ 2022 Lifan KPX 250
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03-27-2023, 10:44 AM	#480
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,562	Yeah, it's pretty tight quarters. More than likely you will have to remove the header pipe. __________________ 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
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03-14-2023, 01:18 PM	#478
Zapkin Join Date: Sep 2022 Location: Ohio Valley Posts: 686	I am curious if anyone has compared the EFI components on the KPX to those of the XPect. I was wondering if they are similar.
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03-26-2023, 07:32 PM	#479
Jay93 Join Date: Sep 2022 Posts: 43	Hey guys! So due to a questionable $35 lever set I now need a new clutch cable. Felt a bit of a grinding in my lever and discovered about three quarters of the braided steel clutch cable had sheared clean through, so fun! Does anyone know how to disconnect the clutch cable from the transmission end? I’ve been looking at it and I’m afraid to get access I’ll need to remove the exhaust. Any input from anyone is greatly appreciated!! 5700mi on my kpx so far and running smooth as butter!
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