SOHC.co.uk Forums > CB350/400

Cylinder bore assessment

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daz-j:
Thank you for the advice, I'm thinking my preference is probably to go for the rebore option, but nothing is straightforward at the moment – there’s only one engine machine shop that I know of locally, they seem to be well regarded but unfortunately are closed due to Covid.  Others further afield do seem to be open though, will have to give it some thought.

Regarding a new set of pistons, is a rebore to suit 0.5mm oversized pistons the standard practice?  I’ve seen Cruzinimage recommended on here before, but didn’t realise until today that they’re US based, unless there’s a UK outlet I'm missing? 

Nurse Julie:
Cruzinimage are in Japan. Extremely easy to deal with and buy from. If you can't find someone more local to do a rebore, we (That's Graham, Trigger) do rebores etc and 90% of the engines are sent to us and returned via courier, so it's all very easy really.

daz-j:

--- Quote from: Oddjob on March 03, 2021, 07:13:28 PM ---Found these but seems damned expensive to me, no idea how much Cruzin charge for the same amount.
https://www.ebay.co.uk/itm/Honda-CB400-Four-Piston-Rings-Bolts-Kit-Original-0-25/254706583305?hash=item3b4db20709:g:MC8AAOSwV6VfTgYW

--- End quote ---

Hi thanks for the link but crikey - £427.33 - damned expensive indeed, struggle to justify that I'm afraid.  The Cruzin +0.5mm set are priced at $100.00, I assumed that was US Dollars but not sure now that Julie has pointed out it's a Japanese business.

philward:
I've had 2 sets of pistons (for 750) and a set of rings for the 500 - luckily never paid import duty so far!

paul G:

--- Quote from: Nurse Julie on March 03, 2021, 06:51:10 PM ---Cruzinimage are in Japan. Extremely easy to deal with and buy from. If you can't find someone more local to do a rebore, we (That's Graham, Trigger) do rebores etc and 90% of the engines are sent to us and returned via courier, so it's all very easy really.

--- End quote ---

Trigger is recommended and will do a superb job.
Don't ask to many questions at Cruzinimage or you will suffer the consequences ;D

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