jJE 1260 Piston kit-gsgkd 1100

[oldgsgkd]

Goooday from Australia, I've had this gkd for many years and really enjoyed it ,opened up the airbox,took off the muffler
gave better mpg -[the noise was not illegal unless you went over 4000rpm ] and has a nice crackle -picked up about 30%
more power -intro

I bought a 1260 je piston kit ,not realising US called my gs as 4 valve ,in Australia a gsx is a 4 valve

can this flat top piston set 128324 be used in the 2 valve engine without piston clearancing
can the stock sleeve handle the 1260 over bore ,already 1200

I've got /had many gsxr's and know nearly everything there is to learn on gixxer.com -oilers 6000 posts -old gsxr
but this site would have more knowledge on the gs's

thanks, Ken

 

[rapidray]

No and no. You need to get 2 valve pistons or will have no compression. The block will REQUIRE sleeving to go to a 78mm bore.
Ray.

 

[GregT]

On the plus side, there's a market locally for the kit among the Post Classic race guys....

 

[oldgsgkd]

Thanks fellas, I just had a look and found the JE sleeve kit too , it's been packed away

 

[oldgsgkd]

well I did the maths, this is what I originally wondered - even though the 4v pistons have no dome
because of increased capacity, with zero deck .76mm copper 78mm bore gasket works out to 9.89 :1
even has the same pin size, I ran this combo through a engine analyzer program about 9 years ago
with the cam I got and I remembered it showed about 140 engine hp -can't remember the torque
so case strip for machining for sleeves, fit bigger sleeves to barrel, head is ported