Need a bit of input please!?

Carl Walichnowski

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Jul 2, 2016
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Okay this is what I need. I need to know the minimal space needed in order for my new engine to fit on a bike. I own a SkyHawk GT5A 66cc motor. I followed the suggested dimensions I read prior to my purchase of the engine & I went ahead and purchased a bike based off of that & after a lot of bitching & cursing I sadly realized the engine wouldn't fit. I'm returning the bike & getting a new one today (undecided on a cruiser or mountain bike) but I need some help from you guys & gals first. I'm including pics of my motor, the suggested dimensions & the bike I'm returning, hope that helps. Also if some input can be given please give the needed dimensions in inches. Thanks everyone!
 
Can you put a piece of cardboard box against the side of the engine and draw around it, cut it out, then take the cardboard cutout with you when you buy the bike or would that be too indiscreet?
 
Can you put a piece of cardboard box against the side of the engine and draw around it, cut it out, then take the cardboard cutout with you when you buy the bike or would that be too indiscreet?
I thought of something similar but my issue was I wanted to reframe from putting the engine together. The previous frame fit way to snug, everything fit except the spark plug wire, another 1 1/2" & I would of cleared it.
 
That's a huffy fortress, I've personally worked on that exact bike for an individual and a 66cc does fit. In fact we used that bracket that let's you use the engine on a wide down tube so that takes even more room away, what do you mean by it not fitting? Like the front bolts don't go past the frame or what? Please explain it further because I know beyond any doubt that the engine will fit.
 
Additionally the person who attempted to put the motor on decided not to mount the front part of the engine, he figured because the bolts wouldn't go past the frame (they aren't far enough part to get past the tube) that he would just let it go. Luckily he didn't use it before bringing it over to us and we caught that he didn't use a bracket for wide tubes. After that fix he's been rolling around for at least a month now without issues
 
I thought of something similar but my issue was I wanted to reframe from putting the engine together. The previous frame fit way to snug, everything fit except the spark plug wire, another 1 1/2" & I would of cleared it.
So get the next largest size of that bike? Or turn the head around so the plug faces forward.. which doesn't make all that much difference to the running of the engine as far as is written in this forum.
 
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