79cc Not Fitting Inside Frame

[SnazzyCazzy]

Hey guys, newbie here.

I recently purchased a 79cc 4-stroke engine kit to put inside a mountain bike. I got halfway done assembling everything and then did a dry fit inside the frame and realized it wouldn't fit. I'm afraid gasbike won't accept a return at this point so I was wondering if it's possible to mount the engine on a bracket above the rear wheel, something such as:
https://www.amazon.com/BoG-Products-Guaranteed-Satisfaction-Durability/dp/B01EQQGJSA
I would then run the chain from the transmission vertically to the sprocket to drive the wheel.

Please let me know if you think this would work.

Thanks!

 

[MotoMagz]

https://motorbicycling.com/threads/lifan-rear-rack-mount-new-rack-no-weld.26364/ If this isn’t your thing maybe try removing gas tank and air box to get motor to fit in frame.

 

[Greg58]

That rack will probably twist under motor torque, sorry the engine didn’t fit in your frame but the simplest thing would be to change to a cruiser frame. You can move most everything from the mountain bike.

 

[xXNightRiderXx]

Alternatively, you could also search for an older mountain bike, preferably pre y2k. Those bikes from the early days of mountain biking are steel tubed beasts, and can take a beating, and have geometry similar to a road bike. Swap the wheels out though, because those single walls cannot handle the strain. Mtb double wall rims with 9mm qr mtb hubs will, especially the new ones.