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Post by t5vinny on Aug 6, 2017 20:32:11 GMT
Hopefully buying a primmy 125 but the engine fitted is a 50 special with a polini 112 4 speed. The guy tells me that it will be quicker than a standard primmy 125 engine. Being a total novice to smallframes i was wondering what to expect from it. I will look for a 125 engine later to build something a bit more special.
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Post by me on Aug 7, 2017 9:01:08 GMT
very odd. A 125 block downed to a 50/112 - a good set up 112 would almost be as quick as a well set up standard 125. To convert the 112 back to a 125 really would only involve a crank swap and maybe primaries. All 125s and 50's were fitted with the same gearbox (4 speed).
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Post by gav on Aug 7, 2017 9:01:59 GMT
It's a small up grade to make a 50 a bit quicker you can upgrade that engine to a 130 quite cheap
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Post by t5vinny on Aug 7, 2017 9:11:34 GMT
Thanks so no worries really. Hopefully get some more pics today and buy it.
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Post by t5vinny on Aug 7, 2017 9:13:45 GMT
Sorry just re read your replies. I meant it had a 50 engine fitted with a 112 kit. Are the 50 casing the same just crank.gearing and cc different.
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Post by gav on Aug 7, 2017 9:27:42 GMT
Yes just swap the bits over Item number272452809442 eBay
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Post by t5vinny on Aug 7, 2017 9:36:49 GMT
Thanks gav
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