what are the differences from the mc100, 101, a,b,c,d?

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Dean Richards
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Joined: Sat Jul 24, 2010 1:31 pm
Vintage Karting items owned: Rupp Chapparall
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what are the differences from the mc100, 101, a,b,c,d?

Post by Dean Richards » Mon Mar 06, 2017 10:45 pm

Hey all, just acquired what I think is at least a Mc 100 from a swap meet and I am looking for information that tells the difference between all these. I know Mcbobaust use to have that info posted, but the site is gone. Thought I had all that info somewhere, but cannot find it. Any help is appreciated. Thanks, Dean.

REAR
Posts: 1221
Joined: Sat Jun 16, 2007 10:19 am

Re: what are the differences from the mc100, 101, a,b,c,d?

Post by REAR » Tue Mar 07, 2017 7:08 am

Dean,

No expert on Mc engines. This might answer a few questions. There were port changes, carb differences, side cover differences, crankshaft PTO dimensions and threads and a host of other small changes within the letter designations also.

Perhaps someone more knowledgeable could break down the exact engine model differences.

Model - Bore Stroke Displacement
MC2 - 2.165 x 1.635 = 6.05
MC5 - 2.125 x 1.375 = 4.9
MC6 - 2.125 x 1.500 = 5.3
MC7 - 2.165 x 1.635 = 6.05
MC8 & 9 - 2.165 x 1.635 = 6.05
MC10 - 2.125 x 1.500 = 5.3
MC20 - 2.125 x 1.635 = 5.8
MC30 - 2.165 x 1.635 = 6.05
MC40 & 45 - 2.165 x 1.635 = 6.05
MC70 - 2.217 x 1.835 = 7.08
MC75 - 2.250 x 1.835 = 7.29
MC49 - 2.125 x 1.375 = 4.9
MC90,91,2,3 - 2.165 x 1.635 = 6.05
MC100 - 2.250 x 1.835 = 7.29
MC101 - 2.280 x 1.835 = 7.5

R.E.A.R.

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