118cc lifan build

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#1
Hey guys first post on here I was intrigued by the idea of using a lifan 4mhp engine and was wondering if anyone knows anything about it. Is it a Honda clone? Can racing parts be used in it? (Gx120 parts) I already know it is a 0.75 in or 3/4 shaft. It may be possible to use the 79cc transmissions, the cnc plates have slotted holes but a 3/4 centrifugal clutch would be used in place of the 5/8 it would be in between power bigger than the old 99cc predator but not as big as the 212s.
 

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#2
I have 1 coming for next bike. I was looking at using a cvt, but then I'd have to go with a jack shaft too or a HUGE rear sprocket to get an acceptable gear ratio. a chain drive for 79cc predator will fit. everyone is making Honda clones, but the bore and stroke are slightly bigger than the 79, 99cc cousins. other than shrouds and tank, it looks like so many others
LifanPowerUSA has some tech pdf's if you poke around their site a bit, incl a lot of dimensions and stuff ads don't mention. mine is LF160F-AQ
I'm gonna love the low end pull the 118cc will give. 2x more than HS 49cc haha.

Home Depot is where I got mine for, $139 +tax. I'll update as I piece it into my frame
 

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#3
Cool I wanted to build one with this motor might end up selling the old 79cc to get some money back because somehow it has spark again when it didn't before. Might re use the transmission plate and get a 3/4 gopowersports clutch. Hopefully it can actually move without pedaling unlike the 79cc. 40mph though?
 

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#4
20180811_080441.jpg 20180811_080330.jpg
got the engine but forgot to look online for a coupon. throttle was locked tight, so I had to loosen up the pivot bolt a lot.
gawd the tank is huge! pretty sure I'll toss it. maybe someone wants it? holds 4L. even LifanPowerUSA didn't have accurate spec on it. they say .9gal 3.4L,,,
custom length header coming soon too

let's build some powerful bikes haha
 

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#5
View attachment 83232 View attachment 83233
got the engine but forgot to look online for a coupon. throttle was locked tight, so I had to loosen up the pivot bolt a lot.
gawd the tank is huge! pretty sure I'll toss it. maybe someone wants it? holds 4L. even LifanPowerUSA didn't have accurate spec on it. they say .9gal 3.4L,,,
custom length header coming soon too

let's build some powerful bikes haha
I would keep the tank as a spare you never know if you're going to need one. Or you could sell it to some kid that wants to build a gokart for like $10 or something. I would get one of the 3L tanks. I recommend using a micargi predator bike. It should have plenty of room in the frame it is a stretched beach cruiser.
 

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#6
IDK, I keep looking at moped tanks or maybe an under the rack type. keep us posted on how your project comes along! I'll try not to hijack your thread hehe
 
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#7
IDK, I keep looking at moped tanks or maybe an under the rack type. keep us posted on how your project comes along! I'll try not to hijack your thread hehe
Don't worry about it I don't plan on building a bike with the 118 yet. I have a 2 stroke on the bike now. Rode it around the yard and down the driveway. Got no pedals though. I just hate to spend alot on something that breaks often. Makes me want to just buy a road legal moped or scooter that doesn't look ugly lol. Atleast I wouldn't be fixing things after every ride. The lifan is only $40 more than a 79 so it seems like a better choice pay 40 more and get a whole hp more.
 

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#8
ever change your mind about how you want a bike to be? I have the trans and centrifugal clutch coming today, but yesterday I decided I want one of the real clutches from 3dmotorsport. but I'm not going about this in a normal way lol. I'll have the engine/drivetrain done before even settled on what frame. I found this sweet custom chopper bike looks like it's begging for a motor. lemme see if I can put a pic
 



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#11
getting closer, but looks like this will be an over winter project. I can't squeeze the 118 into a Hyper cruiser even with a short head without cutting and welding.
20180823_184700.jpg
 


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#13
still puzzling on a frame bcs I got a Hyper cruiser then discovered I have to move the seatpost back 1.8"
I'm currently prepping throttle linkage, exhaust and velocity stack for electroplating (pics soon!)
also waiting on Zoom forks but having trouble with a stem. no idea what size, length to get and they're like $30+. I'd hate to go wrong. all I know is I have 1-1/8 threadless.
 

CrazyDan

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#14
Just figure out how tall your headset is and how tall your head tube is, add them together and thats the minimum length your steerer tube has to be. Threadless makes it a little easier if you go too long.
 

Spare_Parts

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#15
still puzzling on a frame bcs I got a Hyper cruiser then discovered I have to move the seatpost back 1.8"
I'm currently prepping throttle linkage, exhaust and velocity stack for electroplating (pics soon!)
also waiting on Zoom forks but having trouble with a stem. no idea what size, length to get and they're like $30+. I'd hate to go wrong. all I know is I have 1-1/8 threadless.
If you have the same hyper I do it's 1" threaded.
 

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#16
still puzzling on a frame bcs I got a Hyper cruiser then discovered I have to move the seatpost back 1.8"
I'm currently prepping throttle linkage, exhaust and velocity stack for electroplating (pics soon!)
also waiting on Zoom forks but having trouble with a stem. no idea what size, length to get and they're like $30+. I'd hate to go wrong. all I know is I have 1-1/8 threadless.
Something like that happened with me I ordered a 1 1/8 front fork but the bike had a threaded 1 inch fork. I ended up getting a threadless rock shox knockoff for like $70 with suspension and a disc brake mount. Didn't fit the gasbike disc brake caliper though.
 

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#17
the ones I ordered and headset are 1-1/8, id of head tube is only abt 31.5mm IIRC so I was planning to mill off a few thou from the bearing cups to make them fit. seems straightforward to me, even making a spacer from something I have laying around. but the headset may not have enough material to safely remove ~.040 tho. sigh. I really wanted to use this frame and fork but maybe just easier to save it and just get something else. keepyas posted! too many irons in the fire... I have a steampunk build like nobody's seen before too. Sshhh! top secret lol
 



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