Anyone Know How To Fit An Engine To A BMX?

[D.Mills]

Ive seen bmx's with engines on youtube so i was wondering does anyone know how i could do it and what engine?
Rep for best answer =D

[L.Bo]

Lawnmower and duct-tape?

[Marcelwk]

Lawnmower and duct-tape?
You.. Idiot!:D

[ant1h3ro]

just buy a dirt bike?


damn that was easy!

[Valvecap]

maybe a chainsaw engine, and mod some things, so you have to push a pedal/something else and the chain starts engaging.maybe you need to take some links out. Post some pics when it works

[D.Mills]

^ Need more detail =]

[Valvecap]

allright, i will try my best.
step 1: Get an old but still working chainsaw. Get the engine and chain out.
step 2.install the chainsaw between the downtube and seattube.
step 3.get a pipe or something like that, and put it where your spindle should be.
step 4: Try to fit some kind of pedal on the pipe. Try to connect the engine to this pedal
Step 5:attach the chain to your driver. Don't slam your wheels!maybe the axle will break the dropouts. I also hope you have seatstay brakes for this step.
Step 6. Hope that your bike doesn't explode, get some pics, vids and try a triple backflip

[AaronBMX]

it's easy:
use this instead of your sprocket:

feed it once a day

[Valvecap]

^^ what happens when i put nitro in his food??

[AaronBMX]

don't do it, XTC is better.

[D.Mills]

Ill be using valve caps steps. Think it would be illegal to bike around with the engine on. Like race around with it ? I live in UK.

[band aid]

Threads like these are why I no longer come to bmx-forum so much.

[Lemontime]

No, Things like these are why the dumbing down of man-kind is being accelerated..

To OP:
GTFO. Pedal harder..

[bdcain]

this is 20 in front and 18 in rearhttp://www.bsecanada.com/products/PH-05.htm

[jc6711]

it's easy:
use this instead of your sprocket:

feed it once a day

your probaly gonna need a rebuild every 15 hours of riding though. And probaly a new top end every 25.

[Matrix]

Pocket bike engine will fit in a BMX frame. But, you better know how-to weld.

[jc6711]

You could run with out a clutch, and just like pedal to get it started.

[PhoenixBMX]

Threads like these are why I no longer come to bmx-forum so much.
and how is deciding to put an engine on a [hopefully old and spare] bmx any more stupid and pointless than female-ing your axles?

anyway, i've seen it done. the dude even set up the throttle cable with a brake lever. [chainsaw engine, they have a centrifugal (??) clutch] but the main problem was that you couldnt sit still and idle..it would be moving forward as soon as u started it. this was years ago, i never got to ride it.
it would help if you have access to a welder i guess.
go nuts!


just realised this thread is pretty old..

[mohammad]

Ive seen bmx's with engines on youtube so i was wondering does anyone know how i could do it and what engine?
Rep for best answer =D
:prost::prost::prost::prost::prost::prost:
well a snowmobile engine is the easiest thing to fit on something; just four bolts, but also you need a platform attached to your frame

GOOD LUCK PAL!!

[jc6711]

a snowmobile engine would not be the easiest thing to put in there.

[JustinE]

You got to be a idiot to put a snow mobile engine, most of those things are twin- two strokes or triples. Also, they weigh insanely alot. Your gearing is gonna be all ****ed to even go anywhere. No handling also.

Put a god dam Go-Ped engine in it, if anything. A g24RC is fine, built for racing. Plenty to get you to 30-35mph easily.

[jc6711]

or like some 65 two stroke motor from the mini dirtbikes.

[CrazeD]

Chainsaw engines work best. They have a centrifugal clutch which means it doesn't engage until a certain amount of RPM, so it shouldn't take off right away. They're also small, cheap, and should have sufficient power.