Description
Get your rotating weight down. This titanium jack shaft for the Driven JRX saves roughly 8 ounces over the standard shaft, and it saves it in the single best place on a Jr. Sprint to remove weight – the rotating driveline.
Rotating weight costs you twice: once to accelerate it and again every time you have to slow it. On a short Jr. Sprint track with constant acceleration off the corner, taking half a pound out of the driveline is worth more than the same weight removed from a body panel. Titanium is what makes that possible without giving up strength.
It also makes installation noticeably easier – the shaft is machined to precise tolerances so it slides into the mount and locates correctly instead of fighting you on the bench. Direct fit for the Driven JRX Jr. Sprint motor mount system. Order it alongside your sprocket hub and axle spacers if you are refreshing the whole driveline.
