Thread: Lifan 250GY-2 Big Bore Kit?
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#1 Lifan 250GY-2 Big Bore Kit?08-03-2015, 02:51 PM
Hi,
Would anyone on the forums know which big bore kit would fit on a Lifan 250GY-2?
The engine model is 173FMM, it's been mentioned before on these forums so perhaps someone knows.
I would also gladly accept any other suggestion about increasing the horsepower. The bike currently has around 19hp, and after months of usage it's starting to feel a bit "sluggish", at least for a 250.
Thanks!
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#2 Re: Lifan 250GY-2 Big Bore Kit?08-03-2015, 08:32 PM
As far as I know the 173FMM is lifans version of a Yamaha YBR250/XT250 motor, here is one website that claims to have a big bore for it, http://www.xlitemoto.com/products_de...3c3c7bd84.html
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#3 Re: Lifan 250GY-2 Big Bore Kit?08-06-2015, 04:15 PM
I checked the website, the offer sounds nice, although it's a bit more expensive than anticipated :D
Is there any way to confirm that the engine is indeed from the Yamaha YBR250/XT250? I don't want to spend like $250 and end up with a useless big bore kit.Last edited by Rockhorn; 08-06-2015 at 04:44 PM.
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#4 Re: Lifan 250GY-2 Big Bore Kit?08-06-2015, 04:45 PMI checked the website, the offer sounds nice, although it's not as much as I wanted :D
Is there any way to confirm that the engine is indeed from the Yamaha YBR250/XT250? I don't want to spend like $250 and end up with a useless big bore kit.
Here are 2 pictures for you 1 of the engine and 1 of the engine dimensions.
Maybe just ask the big bore kit guys will it fit a Lifan 173FMM ?
lifan2.jpg
lifan1.jpg"Arguing on the Internet is like running in the Special Olympics, even if you win you're still retarded"
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#5 Re: Lifan 250GY-2 Big Bore Kit?08-06-2015, 04:48 PM
I would suggest the same..
You could ask the people selling the kit, if they do not know I cannot imagine who would, other than an Engineer at Lifan or somebody that has the Lifan engine and utilized their YBR250 Yamaha Big Bore kit on it. If your serious then I imagine the people at Xlite should be interested in your plans, it makes their kit viable to sell to others that have the Lifan 173FMM engine.
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#6 Re: Lifan 250GY-2 Big Bore Kit?08-06-2015, 04:56 PM
The bolts are different, the Lifan has two where the Yamaha has four.
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#7 Re: Lifan 250GY-2 Big Bore Kit?08-07-2015, 08:25 AM
Looking on Taobao just now found a company who sell replacement Lifan heads for your engine with some better details of the head, it could help you
The bolts are different, the Lifan has two where the Yamaha has four.
zxz.jpg
zxz3.jpg
zxz2.jpg
zxz1.jpg
Link to site ....https://item.taobao.com/item.htm?spm...ucket=9#detail"Arguing on the Internet is like running in the Special Olympics, even if you win you're still retarded"
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#8 Re: Lifan 250GY-2 Big Bore Kit?
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