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Goped Bigfoot Build Thread (It's almost a car.. :D)

22K views 23 replies 5 participants last post by  acedeuce802 
#1 ·
So I recently acquired this Goped Bigfoot. I bought it used with a few upgrades. It came with the stock G23LH motor, with a CY29CC Big Bore kit (35mm big bore/2mm stroker crank), Sikk Torque expansion pipe, Mad Dog brakes (drilled rotors, with mechanical calipers/pads), new handle bars/steering stem, new billet deck, 3rd bearing support, and lockout. I have found out that 2 mm stroker cranks are not good, 1mm are optimal, and stock are just about as good as the 1mm. So, I replaced the crank with a stock g230RC crank. It pulls HARD now, and tops out at 27.5 mph, which means the engine is spinning at 14,800 rpm. When I had the crank case apart, I noticed that the previous owner had done some porting in the transfer ports, so that was an interesting surprise. In the mail, I have new tires and a new spindle on the way. The tires have a tread pattern similar to a Toyo R1R (http://www.davesmotors.com/s.nl/c.885035/n.1/it.A/id.2720/.f). The spindle will be larger, thus having a higher top end, and less acceleration. I figure that since I pull wheelie's all the time, without meaning to, I have the extra power to pull a larger spindle. If I'm still able to reach the 3rd power band, and hit the max rpm, I'll be looking at a 33 mph top speed. On to the pictures!


IMG_6728 by acedeuce802, on Flickr

IMG_6731 by acedeuce802, on Flickr

IMG_6725 by acedeuce802, on Flickr

IMG_6726 by acedeuce802, on Flickr

IMG_6724 by acedeuce802, on Flickr
 
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#9 ·
Soooo I screwed up a wheel today. I'm not exactly sure how it was done, but somehow there was added stress/friction on the rear wheel, when it was put back together. Every time I'd get up to full speed, the rear end would start fish tailing like crazy. I took a look at it, and the bearing had heat up so much that it melted through the plastic wheel. I ordered a used magnesium wheel with new bearings for $25!
 
#12 ·
[quote author=acedeuce802 link=topic=196101.msg4110757#msg4110757 date=1316051598]
Soooo I screwed up a wheel today. I'm not exactly sure how it was done, but somehow there was added stress/friction on the rear wheel, when it was put back together. Every time I'd get up to full speed, the rear end would start fish tailing like crazy. I took a look at it, and the bearing had heat up so much that it melted through the plastic wheel. I ordered a used magnesium wheel with new bearings for $25!
[/quote]
Probably because your pumping so much power to the tires and it wasn't made for those kinds of speed :lol: 20mph...too fast....LOL
 
#18 ·
Got a new wheel, put on my new tires, and went for a 10 mile ride today. It developed a small air leak (probably at the carb) that is causing a high end bog. It was fun riding around the street's of Ann Arbor, keeping up with cars :lol: I found out that I get somewhere around 50 miles per gallon!
 
#21 ·
Just dyno'd the 'ped today on an ATV dyno we have at the shop. Wasn't able to log the curve, but it made a peak power of 3.3 horse!!!! I'd guess at somewhere around 16,000-17,000 rpm. 3.3 hp is freaking crazy for a 27cc motor!!
 
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