Terrible motor swap idea kz440

wrote:

Since i need new pistons, why not go 615cc? Right? Im on a tight budget so wiseco is not an option right now. I see these cruzin images pistons that seem to be well regarded on a budget but I'm wondering since this is a 1985 gpz550, it has 10:1 stock compression ratio. The heads and pistons are different for this bike compared to all other kz/gpz550s so I dont know how other pistons will affect this. Will 615cc pistons from cruzin images for the 1981-1983 gpz550 work well?
 

The Ebay Cruzin Image 615cc pistons look to be the same design as what you took out of that engine.

 

I believe the kit is just mislabeled as to what year it fits.
 

That's so funny! I just took a screenshot of the pistons to ask if they have the same dome shape as mine.. I just sent a message to cruzin image to ask if those pistons will work on my gpz550.

Cruzin image got back to me and said this: "Thank you for your question. Regarding the KZ550 PISTONS KIT, the pistons and rings are different between the 1981–1983 models and the 1984 and later models.
Therefore, the pistons kit that I sell does not fit the 1985 model.

Best regards,
Mitsuo" 

I understand how the pistons would be different but not the rings. Curious on what you guys think.

wrote:

Cruzin image got back to me and said this: "Thank you for your question. Regarding the KZ550 PISTONS KIT, the pistons and rings are different between the 1981–1983 models and the 1984 and later models.
Therefore, the pistons kit that I sell does not fit the 1985 model.

Best regards,
Mitsuo" 

I understand how the pistons would be different but not the rings. Curious on what you guys think.

 

You should have asked them specifically if the photo of the piston kit is EXACTLY what you would receive if you bought them.

You do realize your asking a Chinese guy, who may not fully understand your inquiry (I have nothing against Chinese people) I worked directly with and for Chinese people for 6 years, so I know what I am talking about... You may have to ask the same question a few different way till it sinks in. You have to remember they are always thinking in Chinese and not in English.

I know that may sound bad but in no way it is meant racial in any way.
 

I understand what you are saying. It's possible that some of the specifics could be lost in the translation. I sent them a response with pictures showing that these pistons look very similar to mine and whatnot. I hope they understand what point I'm trying to get across.

That Company may be selling kits for dozens of different sizes and makes of engines so in some cases they are NOT experts in all makes or know what fits what. It could also be some sort of typo mistake, I have seen plenty of that on Ebay with sellers unknowingly identifying items happily to my benefit

If worse comes to worse you could order it, its not like its a $800 kit that could not be recouped in some way. Plus if they say its for a certain year and its not, would you not be covered under Ebay's buyer protection plan? for misrepresenting a item fitment??

I think that I'll just send it on the piston kit and if they dont clear the head, I'll get a different head if worse comes to worst. Only problem from my understanding is getting the carbs to fit.