KPM 200 Resource thread

[KPMRider]

The rear sprocket on the 2021 KPM200 has 49teeth on 428 chain, and is off set (dinner plate shaped) so I couldn't find any other sprockets that I could safely switch to.

Front sprocket is 16 teeth on 428 chain, this front sprocket has a 20mm shaft hole with 2 bolts and a small gold ring.

The chain is 428 chain 128 links long, if you buy a replacement go with the o-rings

I have switched to a 17t-428 on the front sprocket. It made the bike a lot easier to ride on lower gears and didn't suffer too much power loss at high speed. I'm a light rider so it may not work as well for heavier riders.

STOCK:
Front sprocket: 16t-428 (20mm shaft)
Rear sprocket: 49t-428
Chain: 428 128links
Final gear ratio: 3.0625:1
Top speed: 75 (under ideal road conditions)
Mpg: 89mpg (checked on odometer myself)

With 17t front tooth:
Front sprocket: 17t-428 (20mm shaft)
Rear sprocket: 49t-428
Chain: 428 128 links
Final gear ratio: 2.8823:1
Top speed: 82 (under ideal road conditions)
Mpg: 109mpg (checked on the odometer myself)

I also tried with a 18 tooth front tooth but my chain wasn't long enough so if you want to try that you may want more than 128 links on your chain.

I would advise against going with the 18t because I feel like it would make the bike gutless at high speeds.

I am currently trying to get a hold of a new 165ML-E motor (from the 2021 lifan KPM200) and the manufacturer says the only way to get replacement parts and motors is by having a lifan dealer order one for you. I'll send more info as I get it.

NICHE 428 Drive Chain 128 Links O-Ring With Connecting Master Link for Motorcycle ATV Dirt Bike https://a.co/d/1NeeKfq

WEIYINGSI Sprocket Front 428-17T... https://www.amazon.com/dp/B010UQKODQ...p_mob_ap_share

E3 Spark Plugs E3.38 Premium Powersports Spark Plug w/ DiamondFIRE Technology (Pack of 1) https://a.co/d/3DdWKFT

[dr99miller]

Fantastic info, thank you! I've been feeling the ratio is a tiny bit too short and a one up front would be great.

[KPM]

Originally Posted by KPMRider

I have switched to a 17t-428 on the front sprocket. It made the bike a lot easier to ride on lower gears and didn't suffer too much power loss at high speed. I'm a light rider so it may not work as well for heavier riders.

Based on this info, I also switched.

I agree 100% that it's easier to ride in lower gears. Lost about 2-3 MPH at top end going slight uphill, BUT it also less buzzy up there. IMO the 17T sprocket is what the bike should have from the factory.

[KPM]

Toying with my exhaust, measured everything in hopes of helping others in the future.

Stock OEM black exhaust:
Pre-cat pipe size: 35mm OD
Cat area pipe size: 44mm OD
Post cat pipe size: 35mm

Replacement Stainless manifold from Aliexpress, eBay, Amazon, etc.
Front header pipe: 36mm ID, 38mm OD
Rear header pipe (slides over Front header pipe): 48mm ID, 51mm OD.

[Falkon45]

https://www.chinahao.com/Product/594234035150/

Here's the 45t rear sprocket I went with. It came with a new 16t front sprocket and O-ring chain. I opted not to use the o-ring chain, and went with a standard chain.

Also, total came up to $76 after shipping.

[KPMRider]

I have the 2021 kpm200, I love this bike and it has done really well for me so far. However Kansas summers are no joke, it had a heat index of 105 today and the bike kept flashing it's temp light at me.

I treated the issue very seriously, I flushed out the stock antifreeze and put in engine ice, I changed the oil to 20w50 mobile one, I tried to find a thermostat in town but had to just order one on AliExpress, I also have an oil cooler on the way. The thermostat is set to open at 60° Celsius so I don't think I'm going to be able to find one that opens at a lower temperature.

My issue is that when I am writing at high speed on a really hot day my temperature light seems to flash at me, it must only be over 10 by a few degrees because when I idle down it goes away. I have also only seen this on extremely hot days so far. On a decent day I'm able to get on the highway and full throttle as long as I want.

Does anyone have any ideas that may help me with this issue?

[Falkon45]

I've never experienced overheating in my bike. I'm at 5100 miles now. Have you checked for any signs of BHG? When you added or changed the coolant, did you properly burp the radiators?

Going to 20-50 might not help. Might actually make things worse.

[KPMRider]

Ordered a few things to help me get a better idea of what the water temperature is doing.

I ordered a inline temperature sensor adapter 18mm and a tempature sensor kit. I plan on splicing into the hose that goes into the cylinder head near the thermostat. Links below:

Acouto Motorcycle Digital Thermometer Instrument Water Temperature Meter Gauge Ultru Thin Universal LED Motorcycle Digital Coolant Temperature Gauge Kit DC 12V Blue Light https://a.co/d/5ZGwbJ5

Dynoracing Water Temp Gauge Radiator Temperature Water Temp Joint Pipe Sensor Hose Adapter (18MM, Black, 1) https://a.co/d/cqnrdWj

[Teklock]

Originally Posted by KPMRider

Ordered a few things to help me get a better idea of what the water temperature is doing.

I ordered a inline temperature sensor adapter 18mm and a tempature sensor kit. I plan on splicing into the hose that goes into the cylinder head near the thermostat. Links below:

Acouto Motorcycle Digital Thermometer Instrument Water Temperature Meter Gauge Ultru Thin Universal LED Motorcycle Digital Coolant Temperature Gauge Kit DC 12V Blue Light https://a.co/d/5ZGwbJ5

Dynoracing Water Temp Gauge Radiator Temperature Water Temp Joint Pipe Sensor Hose Adapter (18MM, Black, 1) https://a.co/d/cqnrdWj

You can get that information and more with something like HUD ECU hacker and an ODBII interface (like a J2534 adapter). I would not start hacking into the plumbing of your bike, but that's me.

https://netcult.ch/elmue/HUD%20ECU%2...r/#Charityware

[KPMRider]

I tried changing the gearing back to original sprocket and everything, I'm back to stock. And I for the life of me can not explain this overheating issue

[Teklock]

Originally Posted by KPMRider

I tried changing the gearing back to original sprocket and everything, I'm back to stock. And I for the life of me can not explain this overheating issue

You can try replacing the sensor, but I doubt that is the issue. It is very cheap though....

https://www.engtb.com/item/taobao/644951214242.html

[KPMRider]

Ok I'm now convinced that these motorcycles are complete garbage. I've officially tried everything to fix this heat issue. Added oil cooler, flushed antifreeze, replaced thermostat, tested water temp sensor, changed the gearing, swapped spark plug, checked head gasket, wrapped the exhaust, switched to water wetter, inspected water pump, relocated the antifreeze reservoir to make room for a second fan, wired both fans to a switch to keep them powered all the time, replaced the antifreeze hoses with harder lines to prevent collapsing, changed the oil, burped the radiator a ton.

Good luck with these bikes guys but I would avoid ever owning a lifan motorcycle again. There is no information, there are no parts, there is no support from dealers or manufacturers.

Selling this bike and it can be someone else's problem. This is what I deserve for buying a bike that was made by 9 year old slaves.

[Teklock]

Did you view or retrieve the ECU data? The data will tell you why it's doing what it's doing.

[Falkon45]

Originally Posted by KPMRider

Ok I'm now convinced that these motorcycles are complete garbage. I've officially tried everything to fix this heat issue. Added oil cooler, flushed antifreeze, replaced thermostat, tested water temp sensor, changed the gearing, swapped spark plug, checked head gasket, wrapped the exhaust, switched to water wetter, inspected water pump, relocated the antifreeze reservoir to make room for a second fan, wired both fans to a switch to keep them powered all the time, replaced the antifreeze hoses with harder lines to prevent collapsing, changed the oil, burped the radiator a ton.

Good luck with these bikes guys but I would avoid ever owning a lifan motorcycle again. There is no information, there are no parts, there is no support from dealers or manufacturers.

Selling this bike and it can be someone else's problem. This is what I deserve for buying a bike that was made by 9 year old slaves.

I'm sorry you feel that way. So far, your bike is the only one reported to have heat issues. Like I said, I haven't had anything like that, and I have a 2020 with 5k miles on it. Who did you buy from again?

If you didn't buy from venom motorsports, contact them anyway, and see if they've encountered that problem.

[herbie]

Originally Posted by KPMRider

Ok I'm now convinced that these motorcycles are complete garbage. I've officially tried everything to fix this heat issue. Added oil cooler, flushed antifreeze, replaced thermostat, tested water temp sensor, changed the gearing, swapped spark plug, checked head gasket, wrapped the exhaust, switched to water wetter, inspected water pump, relocated the antifreeze reservoir to make room for a second fan, wired both fans to a switch to keep them powered all the time, replaced the antifreeze hoses with harder lines to prevent collapsing, changed the oil, burped the radiator a ton.

Good luck with these bikes guys but I would avoid ever owning a lifan motorcycle again. There is no information, there are no parts, there is no support from dealers or manufacturers.

Selling this bike and it can be someone else's problem. This is what I deserve for buying a bike that was made by 9 year old slaves.

Oh my goodness! I think you've done your due diligence on the cooling system for sure. If it were mine, I would check the valve clearance just to make sure it's in spec, weird things happen when the valves are too tight or too loose. I can hear the frustration and it's understandable!