Old Yoshimura 816cc Big Bore piston kit for GSX750ES has a ring missing

[rapidray]

My bad! In that case, a GSXR oil cooled motor is NOT difficult to install!!! Ray.

[GSX750ES junky]

Mentioning reliability...
Are there any statistics on Wiseco kit vs. Suzuki stock kit ?
Power output/Torque/Millage ?

[rapidray]

A forged piston will outlast a stock, cast piston due to superior manufacturing process & material. It will also take MUCH more abuse & make more power. I still think you would be money ahead to go with a GSXR or Katana motor. You can buy an oil cooled 750 Katana ENTIRE bike for less than what it will cost you to do your engine! Ray.

[GSX750ES junky]

Ray,
I don't live in the US. I used to but not anymore
In Israel a whole R750 oil cooled motor is more expensive than a second wife

[GSX750ES junky]

I bought the Yoshimura 816cc Big Bore kit for my GSX750ES.
A friend told me that 26 years old connecting rods will not hold for long against the force generated by the new big bore kit, therefor I should go ahead and replace them too.
1. Should I do that ? Should I just replace the rods bearings ?
2. Should I go for the stock rods or should I prefer non Suzuki kits if there are any ?
3. Where do I stop ? In terms of value/$ should I replace the crank too ?

[TeamDar]

I wouldn't listen to that friend anymore. The stock rods are plenty strong for the bore increase. If the bearings are good....run em.

[GSX750ES junky]

I wouldn't listen to that friend anymore. The stock rods are plenty strong for the bore increase. If the bearings are good....run em.

He's a childhood friend ;-) ...
I'm not saying that the increase from a stock 90HP to 95HP should cause a problem. I'm asking whether rods that worked fine with a 26 years old engine producing.... let's say 70HP would suddenly fail with a not only new but also over-sized pistons producing, lets say...95HP ?

[Nessism]

Your rods will be fine. If you want to be really careful you could take apart the bottom end of the engine and inspect the crank/rod bearings to make sure there are no lurking problems.