HSD Racing was formed in
the early 1990s. From the beginning, HSD has been developing
Independent Rear Suspension (IRS) for racing.
versions of the IRS Suzuki LT250R
1995 Dirt Wheels / Over The Bars
1996 3&4 Wheel Action Magazine.
4-Wheel ATV Action)
...Three years later
in the June 1999 ATV Sport Magazine you can see how the same LT250R
evolved into a high-speed well handling ATV with advanced zero-roll
the summer of 1999 the IRS quad's zero-roll A-arm suspension received
(2) pairs of PEP ZPS Zero Preload System shocks. Triple rate fronts
-and- Dual rate rears.
August 2000 Internet
write up to date
REAR SUSPENSION (IRS) quad
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