The SOHC/4 World Tour is in under way.
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Where have all old ported heads from the 70-80's gone? It must be many collecting dust and no longer used waiting for a seat and valve job.
Quote from: PeWe on November 02, 2018, 09:54:05 amWhere have all old ported heads from the 70-80's gone? It must be many collecting dust and no longer used waiting for a seat and valve job.I think so... I have at least two heads for every bike I own. XD... but I just saw this: https://www.ebay.co.uk/itm/Oversized-Intake-Valves-Honda-Four-CB-750-K-SOHC-69-77-34mm/273093318769?_trkparms=aid%3D444000%26algo%3DSOI.DEFAULT%26ao%3D1%26asc%3D20170221122447%26meid%3D013483a1238346a380b88bcdd3d85638%26pid%3D100752%26rk%3D5%26rkt%3D6%26sd%3D273093320079%26itm%3D273093318769&_trksid=p2047675.c100752.m1982If it's possible to install 34mm valves in the K/f1 heads, then why did they go through all the trouble for the F2 head? I'm porting my f1 head for RS34 and am installing these 34mm valves, and then I will just run my current "cheap" 836cc flattops instead of expensive pistons.
Quote from: Ilja on November 22, 2018, 02:32:34 pmQuote from: PeWe on November 02, 2018, 09:54:05 amWhere have all old ported heads from the 70-80's gone? It must be many collecting dust and no longer used waiting for a seat and valve job.I think so... I have at least two heads for every bike I own. XD... but I just saw this: https://www.ebay.co.uk/itm/Oversized-Intake-Valves-Honda-Four-CB-750-K-SOHC-69-77-34mm/273093318769?_trkparms=aid%3D444000%26algo%3DSOI.DEFAULT%26ao%3D1%26asc%3D20170221122447%26meid%3D013483a1238346a380b88bcdd3d85638%26pid%3D100752%26rk%3D5%26rkt%3D6%26sd%3D273093320079%26itm%3D273093318769&_trksid=p2047675.c100752.m1982If it's possible to install 34mm valves in the K/f1 heads, then why did they go through all the trouble for the F2 head? I'm porting my f1 head for RS34 and am installing these 34mm valves, and then I will just run my current "cheap" 836cc flattops instead of expensive pistons. Those 34mm ebay valves won't work in the f2 head....they are to long and keeper groove is different.