SOHC.co.uk Forums > CB750
Surprise 812 Yoshi Pistons - but will they work for me
rem1859:
Thanks for some useful information.
I wasn't looking for a big bore, and was genuinely surprised to find these pistons in the engine. The PO of the engine made quite a few mistakes in building this engine, but who am I to criticise!
I was, and secretly still am, hoping to find rings and get barrels bored to suit, but I am not willing to throw money into a pit.
It seems a shame that what appear to be a lightly used set of pistons are destined to be desk art!
Not to worry.
Oddjob:
Sell them. Someone will buy them, let them have the problems and use the money to buy a decent set of barrels.
philward:
Have you considered going for a Cruzinimage 836 piston kit? I have been running one on my K2 (3000 miles) and my cr750 rep (few hundred miles only). Standard compression and quality is recommended on this forum. Cheap too - ebay link -https://www.ebay.co.uk/itm/165430559105?hash=item26846e0181:g:W4gAAOSwibph5MJM
Engineers on here will rightly say its boring standard liners to limit but if you are not racing, it should be fine (especially with the limited mileage our type of bikes get)
Much improved bottom end torque over standard is a bonus.
You wouldn't need to buy another set of barrels AND new piston/rings/head gasket
Just a suggestion
rem1859:
The last two comments may be the best road ahead.
Sell the ones I've got, and go for a 836 set.
I will definately consider that if I reach a dead end with the rings for my existing pistons.
philward:
Maybe Andy at https://good-bits.co.uk/ may be able to point you in the right direction with regard to sourcing Yoshi rings - he races Honda 750's
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