MOTORCYCLE - VALVE SPRINGS

Model Engine /Part Nº	Type/Material/Application	O.D.	I.D.	Seat Press.	Open Press.	Rate Inch	Coil Bind	Max Net Lift
ARTIC CAT DVX 400 (2004-2008) - QUAD -
S10130	Single Spring - Special Alloy	20.32 mm	14.23 mm	35 lbs	128 lbs	234 lbs	21.21 mm	11.45 mm
	Endurance Application			@33.45mm	@23.35mm
This Spring requires Ferrea Titanium Retainer # E11103 and Ferrea Spring Seat Locator #SL1112.
(Discard OEM Spring Seat Locator)
BUELL XB9 (2002 - 2003)
S10065	Outer w/Damper	1.490	1.076	130 lbs	325 lbs	390 lbs	1.020	.650
	Special Alloy			@1.700	@1.200
	Hi-Performance Spring
This Spring requires Ferrea Titanium Retainer # E11040 and Factory supplied Spring Seat Locator
HARLEY DAVIDSON - EVOLUTION (1984-1998)
S10052	Dual w/Damper - Chro Silicon	1.005	.730	135 lbs	395 lbs	400 lbs	1.160	.650
	Hydraulic & Solid	1.53	1.110	@1.875	1.225
This Spring requires Ferrea Titanium Retainer #E11029 and Ferrea Spring Seat Locator #SL1024
(Discard OEM Spring Seat Locator)
S10053	Dual w/Damper	1.025	.740	215 lbs	550 lbs	460 lbs	1.170	.700
	Chrome Silicon-Roller	1.550	1.135	@1.950	1.27
This Spring requires Ferrea Titanium Retainer #E11028 and Ferrea Spring Seat Locator #SL1024
(Discard OEM Spring Seat Locator)
S10054	Dual w/Damper	1.005	.725	175 lbs	350 lbs	320 lbs	1.160	.600
	Chrome Silicon-Roller	1.440	1.065	@1.810	1.26
This Spring requires Ferrea Titanium Retainer #E11027 and Ferrea Spring Seat Locator #SL1024
(Discard OEM Spring Seat Locator)
HARLEY DAVIDSON - VRSCA V ROD (2002-2003)
S10096	Dual Spring	.819	.625	80 lbs	205 lbs	317 lbs	.790	.550
	Special Alloy	1.103	.819	@1.338	@.945
This Spring requires Ferrea Titanium Retainer # E11041 and Factory supplied Spring Seat Locator
HONDA CRF 250R (2004-2005) - MOTOCROSS -
S10105	Single Spring - Special Alloy	18.10 mm	11.50 mm	50 lbs	165 lbs	292 lbs	27.5 mm	10 mm
	Endurance Application			@39.8mm	@29.8mm
	(EXHAUST - 2 pieces)
This spring requires Ferrea Titanium Retainers #E11071 (EXH) and Ferrea Spring Seat Locators #SL1058 (EXH)
Spring pressures are measured with Ferrea Spring Seat Locator #SL1058 (EXH). (Discard OEM Spring Seat Locator)
S10106	Single Spring - Special Alloy	18.50 mm	13.0 mm	40 lbs	95 lbs	139 lbs	23 mm	10 mm
	Endurance Application			@35.13mm	@25.13mm
	(INTAKE - 2 pieces)
This spring requires Ferrea Titanium Retainers #E11072 (INT) and Ferrea Spring Seat Locators #SL1059 (INT)
Spring pressures are measured with Ferrea Spring Seat Locator #SL1059 (INT). (Discard OEM Spring Seat Locator)
TECH NOTE: Ferrea Pro Springs are designed with progressive wound coils. Assemble stacked coils end of spring
at the bottom on top of spring seat locator.
HONDA CRF 450 (2002-2004) - MOTOCROSS -
S10085	Single Spring	21.50 mm	15.10 mm	75 lbs	155 lbs	203 lbs	25 mm	10 mm
	Special Alloy			@37 mm	@ 27 mm
	Endurance Application
This Spring requires Ferrea Titanium Retainers #E11054 (EXH) and #E11055 (INT)
and Ferrea Spring Seat Locators #SL1043 (EXH) and #SL1042 (INT)
Spring pressures are measured with Ferrea Spring Seat Locator # SL1043 (EXH)
(Discard OEM Spring Seat Locator)
KAWASAKI KLX 400 (2001-2008) - MOTOCROSS -
KAWASAKI KFX 400 (2001-2008) - QUAD -
S10130	Single Spring-Special Alloy	20.32 mm	14.23 mm	35 lbs	128 lbs	234 lbs	21.21 mm	11.45 mm
	Endurance Application			@33.45mm	@23.35mm
This Spring requires Ferrea Titanium Retainer # E11103 and Ferrea Spring Seat Locator #SL1112.
(Discard OEM Spring Seat Locator)
PRO STOCK MOTORCYCLE
S10063	Dual Spring	.890	.650	150 lbs	450 lbs	462 lbs	.710	.650
	Special Alloy	1.215	.890	@1.400	@.750
	Maximum Retainer step .075
SUZUKI DRZ 400 (2000-2007) - MOTOCROSS -
SUZUKI LTZ 400 (2000-2007) - QUAD -
S10130	Single Spring-Special Alloy	20.32 mm	14.23 mm	35 lbs	128 lbs	234 lbs	21.21 mm	11.45 mm
	Endurance Application			@33.45mm	@23.35mm
This Spring requires Ferrea Titanium Retainer # E11103 and Ferrea Spring Seat Locator #SL1112.
(Discard OEM Spring Seat Locator)
YAMAHA YZF450 - (2003-2009) - MOTOCROSS - 5 VALVE ENGINE -
YAMAHA YZF450 - (2004-2009) - QUAD - 5 VALVE ENGINE -
S10119	Single Spring-Special Alloy	18.30 mm	13.3 mm	38 lbs	85 lbs	119 lbs	17.2 mm	11 mm
	Endurance Application			@29.5mm	@19.5mm
This Spring requires Ferrea Titanium Retainers #E11090 (EXH), E11091 (INT) and Ferrea Spring Seat Locator #SL1097.
(Discard OEM Spring Seat Locator)
TECH NOTE: Ferrea Seat Locators must be installed, during assembly, BEFORE VALVE SEALS.

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