250 cc kit for lifan engine

hunter · 10-14-2007, 01:12 AM

I saw a kit on here earlier from 200 cc to 250 i can't seem to find it going through the posts can anyone help me out? thanks

red2003 · 10-14-2007, 08:09 AM

Nope, you didn't see that here. No such kit exists as far as I know. Never heard of it.

hunter · 10-14-2007, 02:12 PM

It was on here not sure if it was for the lifan 200 cc engine or not but i haven't hallucinated in a long time so i'm pretty sure i saw it

knothead · 10-14-2007, 06:36 PM

Just going from 200cc to 250cc would pretty much be a waste of time and money. I think the 200cc engine would really come alive if the compession was raised to 10.5 or 11 to 1, add to that better flow (carb and exaust) and a bit of advance on the cam, I'd guess you could push 20hp or more with a good tune. Once I get my TDM in tune, I plan on executing these mods on my Lifan. The good thing about it would be the minimum outlay for parts (locate a stock 30mm carb and an ebay pipe) and the machine work would only entail either machining the head or cylinder base (and figuring out how to degree the cam, if possible).
Compression is where the power comes from. I've seen a Honda Civic SOHC turning close to 140hp on a similar setup, that's up from a stock rating of 98hp. (that's with a stock cam that had been degreed, a slightly larger TB and a good exauhst... but he did swap pistons to get around 12.3:1 compression!.)

ambassador · 10-14-2007, 08:26 PM

Pretty sure no one makes a 250 kit for China bikes... There was or is a guy from the Phillipines that was fabricating parts but they were for the Lifan 200cc street bikes...

hunter · 10-14-2007, 09:29 PM

now that i think about it

fastguy · 11-06-2007, 07:47 PM

dont put too mutch compression !

i cant start my 500 cause it has way 2 mutch compression i sprained my leg lol

10-14-2007, 01:12 AM	#1
hunter Join Date: Jan 2007 Posts: 101	250 cc kit for lifan engine I saw a kit on here earlier from 200 cc to 250 i can't seem to find it going through the posts can anyone help me out? thanks
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10-14-2007, 08:09 AM	#2
red2003 Join Date: Jan 2007 Location: Northern Vermont, USA Posts: 1,271	Nope, you didn't see that here. No such kit exists as far as I know. Never heard of it. __________________ First Chinabike: 2006 Roketa RSX200E Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP!
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10-14-2007, 02:12 PM	#3
hunter Join Date: Jan 2007 Posts: 101	saw it just wish i would have put it on my favorites It was on here not sure if it was for the lifan 200 cc engine or not but i haven't hallucinated in a long time so i'm pretty sure i saw it
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10-14-2007, 08:26 PM	#5
ambassador Join Date: Jan 2007 Location: Bradenton, Florida Posts: 1,200	Pretty sure no one makes a 250 kit for China bikes... There was or is a guy from the Phillipines that was fabricating parts but they were for the Lifan 200cc street bikes... __________________ 06 Lifan 200 GY-5
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10-14-2007, 09:29 PM	#6
hunter Join Date: Jan 2007 Posts: 101	maybe it was the street bike deal now that i think about it
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10-14-2007, 06:36 PM	#4
knothead Join Date: May 2007 Location: In the land of the busted up ricebowl Posts: 815	Just going from 200cc to 250cc would pretty much be a waste of time and money. I think the 200cc engine would really come alive if the compession was raised to 10.5 or 11 to 1, add to that better flow (carb and exaust) and a bit of advance on the cam, I'd guess you could push 20hp or more with a good tune. Once I get my TDM in tune, I plan on executing these mods on my Lifan. The good thing about it would be the minimum outlay for parts (locate a stock 30mm carb and an ebay pipe) and the machine work would only entail either machining the head or cylinder base (and figuring out how to degree the cam, if possible). Compression is where the power comes from. I've seen a Honda Civic SOHC turning close to 140hp on a similar setup, that's up from a stock rating of 98hp. (that's with a stock cam that had been degreed, a slightly larger TB and a good exauhst... but he did swap pistons to get around 12.3:1 compression!.)
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11-06-2007, 07:47 PM	#7
fastguy Join Date: Nov 2007 Posts: 42	dont put too mutch compression ! i cant start my 500 cause it has way 2 mutch compression i sprained my leg lol
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