pistons for gs 1100/1150

[j31driver]

I have a gs1150 block that I want to put on my gs1100. What are the biggest pistons that I can put in the stock 1150 sleeves? And where should I get them (part numbers etc.). This is for the street only. Thanks.

[Guest]

Wiseco has a 1229 kit.

[rosco15]

That 1229 is a 20mm pin. You can't use it in a gs1100 motor. I think JE does an 1197 10.5-1 compression piston kit with the 18mm pins. You will need to re-sleeve to go to the 1260 kit.

[j31driver]

I want to stay with the 18mm pin. I think Ray said he knows where to get the 1229 pistons in 18mm size.

[lecroy]

That little street bike motor I have in the basement has a 1150 block. It has Wiseco PN# 4194M07800 pistons. These are 18mm and are 78mm bore.

[Guest]

The 78 mm is a 1260. No doubt that block has been sleeved.

We can put a 1229 kit with 18mm pins in your 1150 block.

Jay

[lecroy]

Did not read his questions carefully. Yes it was sleeved! Plenty of meat left in it.

[j31driver]

Thanks Big Jay