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Cruzinimage pistons and rings

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Bryanj:
Genuine Honda were made by Art

Oddjob:
I'm not sure if the rings Cruzinimage were using a few years ago are the same as what they are using now.. The image of the new rings fitted down the bore prior to fitting showed them stamped with the oversize number not an R.

Saying that, aren't Honda ones stamped with a T, meaning Top?. Like an orientation marking not a manufacturers marking?

As for no reports of problems with the pistons/rings fitted by members, would there really be any yet? They don't seize or do anything that would make you suspect them, the rings just wear fast according to what I'm reading, we don't really do THAT many miles on our bikes these days so the problem may not show for a few years, the first thing would be a drop in performance as the compression went down, as the bikes recently had a rebore etc that last thing you'd suspect would be that, you'd go through everything else. After some more miles had passed maybe they'd start to allow oil to be burned, so a little blue smoke maybe, we'd suspect valve stems seals etc before we'd suspect the rings.

I was very hesitant to promote fitting Cruzinimage in the past, like a lot of ex mechanics we don't like aftermarket parts, they tend not to fit well and be of poor quality, however after reading so many members who had fitted them or had them fitted by others on their behalf I came to the conclusion that they must be ok. I'm not saying now that they are not, I'm just saying reports out on the web are saying they might not be as good as we first thought, it might also explain the defensive attitude that Cruzinimage exhibits to criticism, after a few complaints you tend to get very defensive.

I'll not say where I'm reading this yet Ash, let's see if there may be some truth in it first, I have reasons for not linking it in, most notably because some members will get really upset over some of the other posts and I don't want to do that.

Nurse Julie:
Ah yes, I've recently read Mike Nixons Cycle Project myths and tips on the CB350. He was saying it was common knowledge the Cruzinimage big bore kits for the CB350/4 had soft piston rings, leading to probably wearing out the rings resulting in oil burning within a few hundred miles of fitting. So yes, that's a known problem. We never fit big bore kits to our own engines or any customers.

Bryanj:
The reports i have seen on the US site were all 350 four which have the smallest bore size of all the fours and have the tightest tolerance piston to bore.
Most, if not all the reports have eventually concluded that the machinists doing the work did not work to Honda specs because in their opinion it was too tight and would sieze, a fact disproved by a later, understanding, machinist.
Now i have never even seen a 350 four in person, let alone worked on one but the 400 is bad enough and requires a smaller boring bar than i have making me wonder if these US machinists were simly honing out the metal and not boring properly.

Just my own thoughts with no certain proof

Sesman:
I'll not say where I'm reading this yet Ash, let's see if there may be some truth in it first, I have reasons for not linking it in, most notably because some members will get really upset over some of the other posts and I don't want to do

Send the link, I need a little stimulus….

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