So I've been building what I call a ScooteRRockeT out of a 1981 Suzuki FA50. It has the same rake angle and wheelbase as a Honda RS125 track bike (and I may adapt RS125 bodywork to it one day). By my calculations I should be able to hit 70mph fully topped out. The list of mods is as follows:
FRAME MODS:
-Flipped forks in frame, removed gas/oil tank/battery pod, flipped frame upside down
-Modified engine pivot mount on frame to be upper monoshock mount
-Custom bracketry to connect frame to engine and also mount seat
-Gas/Oil tank/battery pod hung under frame in usual gas tank position behind steering stem
-Relocated ignition coil mount
-Custom linkage from center stand to bracketry to create central monoshock system with much more suspension travel than stock
-Flipped and shortened handlebars with all controls swapped L to R
ENGINE MODS:
-Cast Iron 60cc kit decked 1.5mm (milled off the top)
-5 base gaskets to fully expose all ports at BDC
-Cylinder head milled flush with cooling fins for higher compression
-No head gasket
-FZ50 downdraft intake welded to FA50 reed flange
-Inserted Y in oil feed line to feed oil both into the downdraft intake from the FZ50 and also directly to the right side engine bearing on the FA50 cases
-Boyeson FA50 dual stage power reeds
-FZ50 14mm Mikuni VM round slide carb up-jetted to account for big bore kit and pipe
-MLM FA50 techno EDM circuit pipe
-FZ50 crankshaft (the woodruff key location for the primary clutch is different from the FA50 crank. Running the FZ50 primary clutch was the only reason for this swap)
TRANSMISSION MODS:
-FZ50 primary clutch with Malossi red springs
-FZ50 secondary shaft with one-way bearing and 2speed clutch
-FZ50 longer kickstart shaft
-KEPT FA50 FINAL DRIVE GEAR (24:56 instead of FZ50 17:62)
-FZ50 transmission cover
-1" taller 2.75-14 tires instead of the stock 2.25-14s
-EBC grooved brake shoes
According to the Moped Wiki here on the FZ50 it is capable of reaching 40mph with a stock tire size and the engine mods that I have done. Using the FA50 final drive gears and installing the taller 2.75-14 tire gives a 1.75x gearing advantage which is how I am calculating a top speed of 70mph.
Here is a pic from a couple years ago when I was just starting the project and getting a feel for the idea. More pics to come as the project nears completion. Thanks for looking!
-InventorBrent
