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08-19-2020, 06:56 PM | #1 |
Join Date: Aug 2019
Location: Indiana
Posts: 176
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What perfomance parts if any are available for the lifan 200cc fml 163 engine
So I'm looking in to hoping up my engine in my lifan xpect looking for mostly cams and higher compression piston opptions I also plan on porting the head. the engine in the xpect is the fml 163 also known as the cg200 and from my reading the engine has been around for quite a while the engine has a bore/stroke 63.5 mm x 62.2 mm and a 9:1 compression ratio. I know all this probbly wount amount to much but it's impossible for me to leave anything stock its the tinkerer in me. Now I know the fule injection will be the biggest obstacle in all this but I'm determined to figure something out.
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Current Bikes 2019 Lifan Xpect 2016 Harley Davidson Roadster Last edited by ss27gogeta; 08-20-2020 at 06:16 AM. |
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08-20-2020, 10:29 AM | #3 |
Join Date: Aug 2019
Location: Indiana
Posts: 176
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So I've been scouring the internet and have came accrost a few things it seems back in the late 70s to mid 80s honda had some engines with 63.5mm bores but the stroke is not the same as my engine would any 63.5 mm piston work in my engine despite the diffrent stroke or do both have to be the same.
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08-20-2020, 11:10 AM | #4 |
Join Date: Mar 2010
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Most any mod that fits the 167FMM will work on the 163FML including carb upgrades, pipes, etc... I bet the cam and 4' key may work also.
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08-20-2020, 11:55 AM | #5 |
Join Date: Nov 2017
Location: Marseille, France -> Conakry, Guinea
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You really need a piston designed for the engine that you have. Honestly, you could get a little more with a high compression piston (though you could also just deck the head, too, but you're better off getting the key that 2LZ mentioned, you could get a cam like Megadan, and you could port/get the head ported.
Pistons theoretically don't need to have the same stroke to work, but there are other variables, like wristpin diameter, compression height, height above the wrist pin, combustion chamber/dome shape. All of those factors mean you can't just buy any old piston. |
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08-20-2020, 12:42 PM | #6 | |
Join Date: Aug 2019
Location: Indiana
Posts: 176
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Quote:
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08-20-2020, 03:05 PM | #7 |
Join Date: Jan 2020
Location: Lesotho
Posts: 105
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http://chinariders.net/showthread.php?t=26972
That's the link to the thread about the 4 degree advance key for the flywheel. |
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04-29-2021, 06:28 PM | #8 |
Join Date: Apr 2021
Posts: 10
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Hello all, I wanted to ask if anyone here has added the CG250 jug and piston to the 163FML Lifan 200cc motor? I was thinking if it would work give myself a 50cc boost. I have to probably change the piston and rings anyways.
Thanks M |
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04-29-2021, 08:13 PM | #9 |
Join Date: Aug 2020
Location: Australia
Posts: 1,434
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It's not a direct swap of parts. So no you can't just interchange all the parts. Rods and wrist pins etc.
It would be cheaper to just get a complete CG250 167 engine than try and modify a 163. Though if you're after performance a CB250 single cylinder might be a better option. |
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04-29-2021, 08:17 PM | #10 |
Join Date: Feb 2021
Posts: 10
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Athena 240cc big bore kit fits this bike
Here’s a link https://www.crfsonly.com/catalog/pro...oducts_id/6625
Last edited by LifanXpectRider; 04-29-2021 at 08:18 PM. Reason: Typo in title |
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04-30-2021, 12:01 AM | #11 |
Join Date: Apr 2021
Posts: 10
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Ok I'm gonna be cheap then.
https://a.aliexpress.com/_m0Z91RR Would that work if I were to just replace the piston and rings or could is there a better replacement like a Honda or Yamaha piston? Thanks M Last edited by Murphy; 04-30-2021 at 12:02 AM. Reason: Correction |
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04-30-2021, 04:25 AM | #12 | |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,109
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Quote:
To the OP As others have stated, pretty much every mod the CG250 uses the CG200 can also use. The cam I have will work, the exhausts will work, etc. The CG250 and 200 actually make basically the same horsepower, but the 200 revs out better where the 250 falls on its face, but the 250 has a bit more torque in the low end. You could also add a CG250 cylinder and piston, but as somebody else noted there are other variables at work than just the bore size. For one, the engine cases may need to be machined to accept the cylinder as the outer diameter of the sleeve is likely larger. This would require a full tear down of the engine to do so. If it were me and power was my goal, the larger bore would be last on my list. Bang for the buck, a cam is actually the best option. The cam I have basically enhances the current power curve the motor already has. There are other cam options geared toward better mid range and top end power as well, but may require some minor machine work to the head valve pockets for valve overlap clearances. Combine a cam with a proper ported head and a freed up exhaust system and it will feel like a different bike.
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04-30-2021, 11:11 AM | #13 |
Join Date: Dec 2016
Location: Argentina
Posts: 756
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The CG 200 alongside the CG 175 are the "unpopular" ones, so not as many parts as the ones for the 230, 150, 125.
The top end of a CG230 is not a "plug and play". It can be done and depending on how you work it out, you may need a new crankshaft too. 99% of the CG200 i have seen the wristpin diameter is 15mm. 99% of the CG230 i have seen the wristpin diameter is 16mm. Just to name one difference. The top speed of the stock CG200 is similar to the top speed of a CG230. The difference is that the 230 has a bit more torque. Before you even try to get an oversized piston, mod everything else and compare it to a stock cg230 |
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04-30-2021, 07:27 PM | #14 |
Join Date: Apr 2021
Posts: 10
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So would this work as a replacement part? The Piston and rings for a CG200 for my Lifan 163FML
https://a.aliexpress.com/_m0Z91RR |
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04-30-2021, 08:22 PM | #15 |
Join Date: Aug 2020
Location: Australia
Posts: 1,434
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It should be correct but the only way to be sure is to inspect and measure the original parts before making any order.
Also be aware most of the piston replacements are the same online but the ring gaps can vary depending on the advertised bike model* |
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