Probably a crazy idea : Micargi Puma GTS with Lifan 250 v-twin

Discussion in 'Motorized Cruiser Bicycles' started by xXNightRiderXx, May 23, 2018.

  1. xXNightRiderXx

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    Hey guys, I know I ain't been active in a while. Been busy on a bunch of other crap. Anyways, I was browsing around amazon a while back, and found the Lifan engine mentioned in the title, and more recently, found the puma for less than $300. Now, I'm mentioning these two items together because I figured that frame would not only fit, but also reliably handle this engine, and this two cylinder monster can also be a self contained power source for lights, having an integrated 12v charging system built into the stator. It has a built in 5 speed tranny, and that, combined with a 38t direct drive sprocket, should make for a pretty badass ride. Everything the bike would need, minus running lights, drive gear, and the engine mount, is there, and ready to use. Has anyone already done this one, or is it still waiting to be tested?
     
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  2. wheelbender6

    wheelbender6 Well-Known Member

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    I would love to see it, but that is an extremely difficult build IMHO. You would need motorcycle brakes to stop it. By the time you finished, it wouldn't resemble a bicycle any more.
     
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  3. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    Waiting for you to make this happen.

    LIFAN 250cc V-Twin Manual Clutch 5 Speed with Electric Start Lifan 250cc v-twin engine w/ 5 speed transmission electronics . This engine puts out about 18 HP. Engine Model: 2V49FMM These engines are complete with 5 speed transmission, electronic. Stop putting a lawnmower engine on that Mini Chopper give your Mini Chopper the authentic look it deserves with a real motorcycle engine. 250cc V-Twin Engine Specs: Type 4 Stroke Twin cylinders, V-Twin, four stroke, air-cooled Displacement (c.c.) 248cc Bore x Stroke (mm) 49.0 x 66.0 Max HP 16.25 HP @ 8,000 rpm Max Torque 13 ftlbs @ 6,000 rpm Compression 10.0:1 Ignition system: CDI (Capacitive Discharge Ignition) Idle 1,300 rpm Starter Kick and Electric Clutch Manual Wet Multiple Plate Transmission Left foot gear-change, five-gear constant meshing Lubrication Pressure splash inner-outer scavenger rotor Voltage 12 Volt
    Length 20.25"
    Width 14.25"
    Height 17.75"
    Weight 95 lbs.
     
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  4. GarageLife714

    GarageLife714 New Member

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    I want this motor for my kit bobber bike. I have 200cc kikker gen2. That 250cc vtwin would fit perfectly (drools).. Sigh...
     
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  5. xXNightRiderXx

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    I've decided against the Puma, and instead im buying a stretch frame so I can pick and choose my components, and I could send the frame in to fit it with a linkage suspension, that way i can slap a nice big air shock on the rear. Mtb components are probably gonna be the best way to go here. When I have the frame modified, I will likely make the dropouts wider and the stays a bit longer so I can put a 26x4.0 tire on it. I will be using spoked wheels, and im goin 10ga with the spokes. All said, I think this bike is gonna run be around $5000 to build, and about another 500 for insurance, titling, and registration.

    As for the suspension design for the rear, I'm gonna keep it simple and stick with a linkage driven single pivot. And, for the night ranger, it will be a floating shock system. You can get all sorts of inspiration for rear suspension from the mtb industry, so take a look. Im also going to be using a fox float shock on the rear, cause why spare the expense, and fox is known for making some really plush shocks.

    The fork will be a rockshox triple tree, with 203mm of travel. Air sprung as well, so this ride will be smooth and plush. In the meantime, I am still working on getting my 8 speed shifter up to sale quality. Redoing the electronics, including adding a 5 3/4" headlight and a loom, just repainted the frame, and now I'm polishing the engine case. The case will be painted with a chrome paint, with a red anodized finish coat, for that candy look. I also made the largest chainring larger, so I should have more torque available to me now.

    Oh, I almost forgot! I will be painting the stretch bike a candy blue, with candy orange accents. Also, I'll be adding forward motorcycle controls behind the bottom bracket, and I will have reserve cranks and pedals stored in the saddle bags.
     
  6. xXNightRiderXx

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    You guys think this frame would work? Just strip off the chrome, weld on what needs to be welded, including mounts for 203mm downhill disc brakes with hydraulic calipers, and then repaint with a chrome paint with a blue clear. I will probably reinforce the stays more than anything, but with some stylish cross bracing connecting it to the seat tube to avoid warping the stays.
    [​IMG]
    I chose that frame because I think it would fit perfectly with the aforementioned motor:
    [​IMG]
    and then there's these wheels, which i will be placing an adapter onto:
    [​IMG]
    and here's the adapter:
    [​IMG]

    Now just comes the part of actually acquiring these parts....starting with the motor, and going down in price from there. I think what I'm going to do with the brake pedal on the forward controls is use it to actuate the clutch. I won't be able to do hydraulic mtb brakes on this bike without doing that. But, as far as mounting the engine....necro, would you be able to help me out with that? I saw the way you mounted that 125cc lifan to your puma, and I found it interesting and ingenious.
     
    #6 xXNightRiderXx, Jan 8, 2019
    Last edited: Jan 9, 2019
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  7. wheelbender6

    wheelbender6 Well-Known Member

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    Any updates? Still plan on using the Lifan vee engine? I love crazy ideas.
     
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  8. indian22

    indian22 Well-Known Member

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    I too like the crazy ideas. V 250 Yamahas have indeed been used on bicycle style frames, the Lifan 250 V is a knockoff of the Virago motor, I have a Lifan as well as an original Yamaha motor that I acquired and plan for use on a board track style bike. I also plan on using a bicycle frame but one that is highly modified. I started a thread (page 3 of board track forum) Old guys V twin and sidecar, but got tied up in other projects. Hope to get back to work on it next summer.

    A good build thread that uses an older version of the 250 V Yamaha with unitized transmission, is the Excelsior V twin (100 mph bike) thread on page 4 of the board track forum, started by Dare devil...it's pretty detailed & has good info. On page three of the same forum, there's a Briggs V twin with CVT build by Veskt that is really detailed & contains excellent information as well.

    I've no idea of your skill level, but even if you are highly advanced these two threads are worth your time. I think your budget sufficient for the task you've set. P.M. me if you have questions. Though I build vintage style the basics are much the same. Neither of these two bikes ended up using stock bicycle frames or wheels and for very good reasons. Dot rated tires wheels and brakes allow you to put it on the highways legally. The neck and fork geometry of a bicycle typically won't track at high speed& this could prove fatal. Frame strength and dimensions are only two of the factors involved & lots of problems to be solved...prior to investing in all the parts.

    Just to be clear neither of my motors are for sale just mentioned so you know I'm invested in finishing a 250 twin one day.

    Best of luck on this very intriguing project.

    Rick C.
     
    #8 indian22, Jan 17, 2019
    Last edited: Jan 17, 2019
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