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Suzuki M18a s-1 vs s-2 heads

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03 Nov 2019 18:18 - 03 Nov 2019 18:19 #215326 by Zapnologica
Good day,

I managed to get my hands on two m18a import motors, and while busy cleaning them up I noticed that their tappet covers were slightly different, this lead to me finding that the two heads had different part numbers.

The one was:
  • S-1
  • Other
  • S-2

See images attached.

I would like to know if anyone knows what the difference is? I can't seem to find anything on the net?
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Last edit: 03 Nov 2019 18:19 by Zapnologica.

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03 Nov 2019 20:22 #215332 by jackonlyjack
Not much known about the m18's in the UK
only member in the UK is Riccy with one fitted
Are both engines identical or is one vvt/none vvt

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03 Nov 2019 21:18 - 03 Nov 2019 21:19 #215335 by Riccy
Replied by Riccy on topic Suzuki M18a s-1 vs s-2 heads
Interesting find there! Where are they imported from?

My M18 has the S2 mark and is VVT (has a bulge on the front of the LHS rocker cover around the timing chain). I have no idea what the S2 mark means though.


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Last edit: 03 Nov 2019 21:19 by Riccy.

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03 Nov 2019 22:22 - 03 Nov 2019 22:24 #215337 by mlines
Replied by mlines on topic Suzuki M18a s-1 vs s-2 heads
I can only find one head listed - but I note it is tagged as variation 2

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Last edit: 03 Nov 2019 22:24 by mlines.

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04 Nov 2019 04:14 #215341 by Zapnologica
Thanks for your responses, yes they are both vvt versions.

I have asked some people here in SA who has done the conversion and theirs say S-1.

I am assuming then that it's just a newer version of motor? No power or performance increases?

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