February 14, 201511 yr I have a 125 Pro FM237 forward kick for my next project and am considering sizing up the barrel and piston to a 200 when I go through the engine. I would love to hear from anyone who has done this first hand on either the Fantic or a Minarelli rear kick engine. What other than the barrel, piston and carb will need changing? Will the 125 flywheel be heavy enough? I haven't ridden a 125 yet and wonder if the 3hp increase is really worth it, especially if the 125 barrel is in good condition.
February 14, 201511 yr Author Nice one shazsfan. Excellent answer thanks a million. I did wonder about the extra flywheel weight as I'd heard the Mike Hann 200's had them added. I'll stick with the 125 item. I have a new PHBL 25 BS and a stock air box as well as a 240 exhaust and tail pipe. Cheers.
February 14, 201511 yr I had a 1983 Fantic 125 pro twinshock forward kick bike with Densi ignition , it had a 1.492 kg flywheel , i played around with different engine parts over the years , and at one time had a 205 (156cc) mono engine in it , motoplat ignition flywheel weighed 1.601 kg , so extra weight not really needed . Bike gone now , but i think i ended up with a 51- 52 tooth rear (428) sprocket .... Best handling bike i ever had ...
February 14, 201511 yr Mine runs 125 flywheel, bigger airbox, straight through silencer, 26mm dellorto carb, they've got plenty of go and a slightly better than the 200 minarreli
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