road bike or moutain bike

If your trek 820 is full size and have plenty of room in the v-frame middle part,than yes if will fit fine and be great to motorized.

The trek 820 is a mountain bike.
 
i am not installing it in the frame, i bought a staton 33.5 cc robin subru 4 stoke motor, staton set up rack mounted? is this a good set up? have u herd of it?
 
I have heard of it and i know nothing about it, im sure its easy to install and that it probally is a good kit. And i bet it can go on almost any bike. Sounds like a good setup and you can use regular gas without mixing oil.

But it was too much money for me as i bought a 48cc 2-stroke inframe kit for $185 and put it on a $99 Scwhinn del mar cruiser bike.
 
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