fantic240motor Posted February 14, 2015 Report Share Posted February 14, 2015 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. Quote Link to comment Share on other sites More sharing options...
fantic240motor Posted February 14, 2015 Author Report Share Posted February 14, 2015 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. Quote Link to comment Share on other sites More sharing options...
hewson Posted February 14, 2015 Report Share Posted February 14, 2015 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 ... 1 Quote Link to comment Share on other sites More sharing options...
furse Posted February 14, 2015 Report Share Posted February 14, 2015 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 1 Quote Link to comment Share on other sites More sharing options...
fantic240motor Posted February 14, 2015 Author Report Share Posted February 14, 2015 What tooth front and rear sprockets do you run furse? Quote Link to comment Share on other sites More sharing options...
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