S1 and S2 flywheels what is the difference

Technical advice Q&A

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phoenix
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#1 S1 and S2 flywheels what is the difference

Post by phoenix » Wed Aug 20, 2025 11:23 am

AS in the heading can anyone tell me the difference i.e. dimensions of both. Thanks
S1 4.2 RHD Bryan

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mgcjag
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#2 Re: S1 and S2 flywheels what is the difference

Post by mgcjag » Wed Aug 20, 2025 2:30 pm

4.2s are the same...3.8 has less teeth(104).....Steve
Steve
69 S2 2+2 (sold) ..Realm C type replica, 1960 xk150fhc

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david muir
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#3 Re: S1 and S2 flywheels what is the difference

Post by david muir » Wed Aug 20, 2025 3:28 pm

3.8 weighs 18lbs, think 4.2 is heavier.
1964 3.8 FHC

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