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DannoXYZ · July 26th, 2019, 07:00 PM

I had couple extra rear shocks laying around, so made comparison:

#1 ‘07 EX500 shock 45014-1365, 312mm length, is exact same as #2 '86-87 1st-gen 250 shock with 0.15mm thicker spring. Not significantly stiffer enough for +90lb bike.

#2 ‘86-87 EX250E 1st-gen shock 45014-1339, 312mm. Both this and EX500 shock have rotating-collar preload-adjuster which also makes it easy to replace spring.

#3 ‘88-07 EX250F pre-gen shock 45014-1406, 315mm, smallest wire-diameter softest spring. Non-adjustable in every way.

#4 ‘08-12 EX250J new-gen shock 45014-0234-37S, 320mm, stiffest stock spring, gets 5-way pre-load adjuster

#5 K-tech Razor-R shock, independent preload & length adjustments (set to 320mm). Also separate rebound & compression adjustment knobs

#6 Ohlins shock from GSX-R1000. Adds about 4-lbs extra weight. Not sure it's any better than Razor-R. Lap-times not any different in practice @ Thunderhill today.

July 26th, 2019, 07:00 PM	#1
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	A shocking tale! I had couple extra rear shocks laying around, so made comparison: #1 ‘07 EX500 shock 45014-1365, 312mm length, is exact same as #2 '86-87 1st-gen 250 shock with 0.15mm thicker spring. Not significantly stiffer enough for +90lb bike. #2 ‘86-87 EX250E 1st-gen shock 45014-1339, 312mm. Both this and EX500 shock have rotating-collar preload-adjuster which also makes it easy to replace spring. #3 ‘88-07 EX250F pre-gen shock 45014-1406, 315mm, smallest wire-diameter softest spring. Non-adjustable in every way. #4 ‘08-12 EX250J new-gen shock 45014-0234-37S, 320mm, stiffest stock spring, gets 5-way pre-load adjuster #5 K-tech Razor-R shock, independent preload & length adjustments (set to 320mm). Also separate rebound & compression adjustment knobs #6 Ohlins shock from GSX-R1000. Adds about 4-lbs extra weight. Not sure it's any better than Razor-R. Lap-times not any different in practice @ Thunderhill today. Last futzed with by DannoXYZ; September 11th, 2019 at 06:31 PM.