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GPZ pistons in GS1000

  • Thread starter Thread starter runrx02
  • Start date Start date
R

runrx02

Guest
Anyone have any knowledge of using GPZ1100 (1983-1984) overbore pistons in a GS1000? From what I can gather they are 8 valve engines with 18mm wrist pins.
Wiseco makes 75mm and 78mm. the 75mm would bring me to 1145cc and the 78 (if even possible) 1239cc.

Anyone know if this has been done?
 
Check the pin to crown distance & the location & depth of the valve pockets. If the GPz measurement is the same as the stock GS1000 piston's, you should be ok.

Terry
 
Hi

With the original sylinder sleeves you should not go over 73.5 mm.
They will be to thin.(73.5 mm is 1100 ccm)
 
What Einar said! You would have to see if re- sleeving is possible.

Terry
 
well over at dragbike.com they said the domes and pockets are different. so i'll either have JE or arias custom make a set, or just go with the 1100cc kit from wiseco.
thanks for all your help.
 
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