I want to put a 54mm piston into a ATC 90.

[81ATC185S]

For the piston to work I know I will have to bore it, but what piston and cam combo will work?

[Joseph Farrow]

Shortline10 can help you with the Piston kit and Cam. Look him up.

[81ATC185S]

Ok, I sent a pm his way.

[oscarmayer]

If shoreline cannot help, then go to www.tboltusa.com. Vince is s great guy and can help you get what you need even an upgraded alloy cylinder ready for install that cools better, lighter too!!


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[John Tice]

Weather a plated cylinder or an iron bore; we fit the pistons with nearly the same skirt clearance. For iron bore only an additional +.0005”. The specified clearance on a Wiesco box says nothing about differences between iron & plated cylinder bores.

John Tice
503-593-2908 Alternate 541-508-3944
www.smallenginemachineworks.com & www.nwsleeve.com
Turning Custom Cylinder Sleeves Since 1971

[greenhuman]

I think you will find the T Bolt stuff is based on the ATC70 cylinder and will not ft the ATC90. They are a completely different engine design.

[oscarmayer]

I think you will find the T Bolt stuff is based on the ATC70 cylinder and will not ft the ATC90. They are a completely different engine design.

They have different patterns that was why I said he needed to talk to Vince. Not shop on his own.


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