Tiada makes a long rod stroke in 8mm. The difference is that it will come with a longer cylinder so no spacer is needed. The long rod used with the correct piston will not create any side wall pressure. I have the 6mm long rod stroke in mine with a 63mm bore and have yet to have a problem after 5 years. The trick is that with their setup you are not raising the sleeve up out of the case by using a spacer so the piston rides in the bore just like the stock does. Take your time and it will last a good while.
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