YS91ST ring work in a YS91SR?

beans07 · 06-19-2012, 08:34 AM

Hi just wondering if the YS91ST ring will fit in the YS91SR engines?

I can't find any SR rings instock in Australia, but there is ST rings available.

mchammer · 06-22-2012, 01:16 AM

Dont think so, the sr has a longer stroke than the st so being the same displacement the ring is smaller on the sr.

06-19-2012, 08:34 AM	#1
beans07 Registered Users Join Date: Nov 2006 Location: Vic, Australia	YS91ST ring work in a YS91SR? Hi just wondering if the YS91ST ring will fit in the YS91SR engines? I can't find any SR rings instock in Australia, but there is ST rings available. __________________ Synergy E7 ~ Logo600SX + 600SE ~ Synergy E5 ~ Synergy N5C ~ Mini Protos ~ Futaba 14SG

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06-22-2012, 01:16 AM	#2
mchammer Registered Users Join Date: May 2009 Location: California, USA	Dont think so, the sr has a longer stroke than the st so being the same displacement the ring is smaller on the sr.