RX3 engine modification technical data

jpms · 05-02-2021, 01:18 PM

Hi everyone ,now here is a little project I would like to try , maybe there are some Quad Race guys that have tried my idea,
1.Question take the NC250 cc water cooled engine ,
2. Replace the 82m piston with a NC450cc 92m piston and Cylinder.
Question .
Will the NC250 cylinder have enough material to machine to 92m.
Or would the NC450 fit the holding studs without machining the Engine crank cases.
3. I understand the NC450 Conrod stroke is longer but I did not want to change the engine stroke .
4. I have done some calculations in my head and belive the the big end bearing are the same size in the 250cc and 450cc . But not sure on small end bearing size .
Ok guys let’s see the info roll in kind Teagarden Joe in the U.K.

05-02-2021, 01:18 PM	#1
jpms Join Date: Aug 2017 Posts: 9	RX3 engine modification technical data Hi everyone ,now here is a little project I would like to try , maybe there are some Quad Race guys that have tried my idea, 1.Question take the NC250 cc water cooled engine , 2. Replace the 82m piston with a NC450cc 92m piston and Cylinder. Question . Will the NC250 cylinder have enough material to machine to 92m. Or would the NC450 fit the holding studs without machining the Engine crank cases. 3. I understand the NC450 Conrod stroke is longer but I did not want to change the engine stroke . 4. I have done some calculations in my head and belive the the big end bearing are the same size in the 250cc and 450cc . But not sure on small end bearing size . Ok guys let’s see the info roll in kind Teagarden Joe in the U.K.
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