Help with a GT 550

[ErnieGS1100EZ]

Hello all,
I know this is a GS site but I have run out of places to go.
I have a 76 GT 550 in the shop with a blown center piston. This was caused by pre ignition. The trouble I am having is I can't seem to find one that is not part of an overbore kit. I would rather not go that route.

IF anyone can point me in the right direction, I would greatly apreciate it.

Happy Holidays to all.

Ernie

[195suz]

Ernie
Call paul miller @ 860 828 1771 He deals in old nos suzuki stuff .

[Kris V]

Ernie, I had the same thing happen to mine,it is because the front tire blocks off the air flow at high speeds. Once you get a piston kit put in change your center plug to a cooler rating along with making it a little rich on the center carb. Do one at a time for best effect. this is how I fixed my problem after two center pistons with nickel size holes in them.\\/

[ErnieGS1100EZ]

Hi guys,
I checked the jets and the right ones are installed according to the repair manual. I'll dedinately call Paul Miller and see if he has anything for me. I will change the plug and definately reset the timing.
Thanks for the help.
Ernie