Full Suspension & Big Engine Challenge

ZnsaneRyder · #1 01-11-2009, 09:13 AM

This is a challenge to build the ultimate MB. Power, speed, strength, and ability to run over things, and go off road and in water and be the ultimate 2-wheeled vehicle.

It does NOT matter where you put your engine, but you have to have the full-suspension working, because of the hard city and offroad use it may endure.

The catch, is that you gotta be bigger than 43cc.

49cc-80cc, or more. Reasons are engine weight & horsepower needed to take you anywhere offroad, and still have the speed to use on the road.

I'm starting off being in the process of building a 79cc 2.5HP bike. 4-Stroke to be able to use any gas I find, no need for fuel & oil mix. I may consider a 2-stroke as well, but I'm sticking with this engine for now. It weighs 24lbs, which hopefully wont be too heavy rack-mounted with a clutch and sprockets. Harbor Freight Tools - Quality Tools at the Lowest Prices

I'm using a Staton 24-inch Plastic Tuff Wheel, but putting it on a 26 inch bike and will modify the brakes. It's the strongest big wheel without spokes that I could find for bicycles.
Motorized Bicycles Detail Page

If you have any input, or want to enter the Challenge with a full-suspension bicycle of your own, that would be great!

Andyinchville1 · #2 01-11-2009, 10:27 AM

HI,

This sounds like a very interesting thread!

When I get some more time I am will try to make more progress on my build (the bike itself is together but the engine kit / shifter kit is not installed:

Bike is an Older GT LTS Team edition frame (full suspension), Black with red anodized parts.

I took all the other components (brakes, wheels, seat Rock shox etc..) off another mountain bike I bouhgt just for this build (FWIW, and this may help others out there in their builds, it was cheaper to buy an entire bike to pirate parts off of than to buy all the parts to build up a bare frame separately)...

I will be running one of Blue Collar's "80" cc engines and I will be running Jim and Pablo's shift kit Modified with our Red Anodized Super Sprockets.

The engine will be stock (at least initially), but I will run one of our Power Pipes....

I am going to tinker when it gets a tad warmer!

Looking forward to seeing all the pics tin this thread!

Andrew

industrialphreak · #3 01-12-2009, 10:37 AM

What about recumbent trike based velomobiles?
what do we win?

rsmith · #4 01-12-2009, 03:37 PM

I'll be up for this. A hardcore full sus is what I need for the trails near me. Finding a suitbale frame could be tricky though. The GT looks a good option. Rob

trackfodder · #5 01-12-2009, 07:09 PM

You can buy 5-1/2 hp for $129. Their 6-1/2 goes off sale for $129 after tomorrow

ZnsaneRyder · #6 02-02-2009, 03:23 AM

I've been too busy & broke to work on the bike, but I've been getting a few parts for the planned build. I'm going to use the same bicycle I use now for my trailer, but make a rack-mount for the new engine.

I'd love to use my 6.5, but it's just way too massive to put on a bicycle, so I'm sticking with the 79cc 2.5HP 4-stroke engine.

I already have a #40-chain 10T clutch, and some #40 chain, and a 48T freewheel sprocket for the jackshaft. I need to get a hub for my 48T sprocket and a 24T solid sprocket for my rear plastic wheel, and need to build the rack.

It's a work in progress, may be slow, but patience is the key, as I do plan on making this a main source of transportation, and HAVE to have off-road capability.

I'll keep you posted.

mabman · #7 02-02-2009, 07:06 AM

Project M85 - Ultralight Freeride MotorCycle

Easy Rider · #8 02-02-2009, 11:21 AM

The M85 is a sweet bike but it's considered a motorcycle because it isn't pedal assisted.

NunyaBidness · #9 02-02-2009, 11:53 AM

The M85 has been one of the inspirations behind an idea I have been thinking on. I would like to build a frame that my 69cc chinese motor would mount in, it would be full suspension with disc brakes, a jackshaft that powered the pedal crank with a free wheel and lets me use the 6 speed bike cassette.
ahh
dreams are big sometimes

trackfodder · #10 02-02-2009, 12:50 PM

USE the 6.5. I am using a 5.5 Jiang Dong like HFT sells by another name. It does just fine with #41 chain. The bike is Monark. I am using a 3 speed hub tranny for a jackshaft. With a biggy you can use the governor for cruise control. It's nice not to have to screw around with throttle setting on hills etc. Mine ran 42 with the governor at 3100 I have since changed carbs and gone to a straight pipe. KW