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 "SLEEPER"  MEANS AFTER THIS KIT IS INSTALLED NOBODY CAN TELL YOUR ENGINE IS NOT JUST STOCK

FITS :

ALL S90 CM91 CL90 SL90

CT90K0 TO CT90K4

ATC90'S WITH A ENGINE SERIAL NUMBER'S SMALLER THAN 1113934 OR ABOUT 1971 AND OLDER

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Hey Jack,

I just wanted to give you a status update. I have about 250 miles on the 120cc kit, it's great fun.

If someone is in Denver or similar elevation and they want to use the stock carb with the altitude adjuster, the best settings are:

35 pilot jet 72 main jet needle on middle shim 1.5 turns out on the air screw

I can get over 50mph on the flats and I'm 260lbs. Larger jets run too rich at my altitude and the engine's hot enough I wouldn't go leaner. I understand the 22mm carb will breathe easier but at my weight 50mph is spooky enough and I have other bikes for pure speed. The CT geometry seems happiest at 40mph and your kit's given it outstanding grunt for such a little bike.

Thanks again for creating such a cool kit for the bike!

- Eric N


"DIY" OLD TYPE OHC90 HEAD/CYL 120cc "SLEEPER" STROKER CRANK CORE KIT READ FITMENT CAREFULLY (273L/253K/313i/296N) 273L/253K/313i/296NRegular price: $149.95Sale price: $129.99

PLEASE CLICK AND READ THIS BEFORE BUYING
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PLEASE CLICK AND READ THIS BEFORE BUYING


CRANK PIN INSTALL INSTRUCTIONS


PIN ARROW POINTS UP


BOTTOM END ROD CLEARANCE/GAP .004"


RING INSTALATION SEE PIC / PISTON TO CYLINDER CLEARANCE .001" TO .002"


THE CHARACTER SIDES FACE TO THE TOP OF THE PISTON DOME


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