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Which 65mm pistons for a big bore?

  • Thread starter Thread starter 5hrine
  • Start date Start date
5

5hrine

Guest
I have a gs 550 and am intending to put the top end from a gs 650 on to get 673cc. But then I thought why not try for a 740cc with Wiseco pistons. I am not sure that Wiseco make the GS650 big bore kit any more, but I saw they were 65mm to get to 740cc. Are there any other manufactures who do a GS650 big bore kit, or are there other stock 65mm pistons that can be used with the GS650 top end ? I hoped someone would have some answers.
 
Hey shrine,

wisco does make the big note kits again. I was able to get a few other guys on here to do a group buy on Pistons. We already got the Pistons now so you will need to get a froup together and get at least 12 Pistons. If you follow this link you will have all the information you need.
http://www.thegsresources.com/_foru...ial-Group-Purchase-Wiseco-GS650-741cc-pistons

i could also send you the official print for the pistons. I had to sign off on it after they took a 3-d scan of my 650 head. When they started the process, they only had the hand drawings for a print. Ha ha the 3-d scan of the head confirmed the shape and size of the dome.

here is the link to my project so far.

http://www.thegsresources.com/_foru...S550T-to-740-build-(aka-the-shaniqua-project)
 
Last edited:
Hi Ace07

Your build looks great. i have one other party interested in some wiseco 65mm pistons, so just one more set to go and the official print would be really helpful, thanks
 
Suzukian said:
I think it would be easier to source a 750 engine and graft it to your frame. Probably would costs tons less, especially if you value your time, and you will have a more solid engine. IMHO.
Click to expand...

Five year old thread back from the dead..
Don't think you will get a reply from 5HRINE.
He's no longer a member..
 
Suzukian said:
I think it would be easier to source a 750 engine and graft it to your frame. Probably would costs tons less, especially if you value your time, and you will have a more solid engine. IMHO.

There's a 90 Suzuki GSX 750 GSX750 F Katana engine motor

on EBAY right now for $279.44, with a video of it running:
Click to expand...


A GS750 engine would be a poor choice if a GS650 top end was available, the 650 head and piston design is vastly superior, and the 750/1000/1100 engines are substantially heavier and substantiallly wider, detracting drastically from cornering ability.
A GSXR750 engine on the other hand...:GB_bonesrock:
A much more compact and potent engine!
 
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