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Harley-Davidson 124R Upgrade
Even More Power!
Words: Chip Kastelnik Photos: Mikey Van Senus
Jul 8th, 2015
Bumping up a 120R crate motor to a 124R.
Speed Spotlight - The 106 Package for Harley-Davidson Twin Cam motor
Speed’s Performance Plus Engine Upgrade
Jan 27th, 2015
Darn near twice the horsepower and torque in a day, without taking the engine out of the frame. No complicated or expensive machine work required, all done with…