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Makotosun

RT1 1970 barrel/jug piston and head

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Replied by Drac56 on topic RT1 1970 barrel/jug piston and head

Not sure on the pics you’re referring to but if 2.5 is the number yall think is best.  I will jot this down when mine all comes together.  The 3.4 came from the Yami Service Bulletin 235.. 

Cheers Guys.. 

drive.google.com/file/d/1hnZYm7FNdqyyZ3b...SZ/view?usp=drivesdk
17 Jun 2026 21:16 #21

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  • Tinker man
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Replied by Tinker man on topic RT1 1970 barrel/jug piston and head

Thanks for all the input. If the ports look right when I compare my original and the second set up I bought I will use them as much better condition

Still odd no capacity marked on the barrel/jug

Thanks all

Ian
I love taking stuff to bits - putting back together is another thing altogether.
18 Jun 2026 00:23 #22

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Replied by RT325 on topic RT1 1970 barrel/jug piston and head

Not sure what they were smoking in that service bulletin @3.4, but I want some to try lol. 250's are 3.2 with shorter stroke.
18 Jun 2026 15:00 #23

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