Rear upper suspension shaft

[yamyrider]

Hey, I am working on a 2007 Apex and the rear suspension upper shaft where it bolts to the sled chassis is stripped. I want to re-tap the hole and wondering if someone knows what size tap needs to be used. There is a solid shaft with the 2 upper idler wheels and bolts to chassis. The shaft needs to be re-taped. Thanks.

 

[74Nitro]

10 x 1.25