Primary Chain Sling Pin Bolt. Every bike needs to have a sling pin bolt
under the speedway regulations to prevent damage occurring when
the primary chain breaks. Our bolt has a 6mm hex socket so you can
tighten it using a hex key and a 17mm A/F spanner.
under the speedway regulations to prevent damage occurring when
the primary chain breaks. Our bolt has a 6mm hex socket so you can
tighten it using a hex key and a 17mm A/F spanner.