CMS-Japanese Motorcycle Supply Parts


Fork Spring Lengths, Limits, Part Numbers, New Alternatives - Honda CX500, GL500, CX650, GL650


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A work in progress! These numbers are all from the relevant parts fiches and factory service manuals, but some look wrong - we will attempt to correct what we can when we get more info.

Please double check any linked products prior to purchase in case of an errant link - Amazon in particular seem to like throwing up lots of non-relevant results...

You may have to scroll to the right to see the rest of the columns for new alternatives depending on your screen size.

Year Model Fork Diameter Long Spring No. Long Spring Lengths
(normal, limit)		 Short Spring No. Short Spring Lengths
(normal, limit)		 New: Progressive New: Racetech
1978, 79 CX500
33mm
 51402-415-003 461.7mm, 449.5mm 51401-415-003 98.2mm, 90.1mm
11-1109
eBay, AMA
1979, 80 CX500 Custom
33mm
 51402-415-003 461.7mm, 449.5mm 51401-415-003 98.2mm, 90.1mm
11-1109
eBay, AMA
1980 CX500 Deluxe (USA)
33mm
 51402-415-003 461.7mm, 449.5mm 51401-415-003 98.2mm, 90.1mm
11-1109
eBay, AMA
N/A
1981 CX500 Deluxe (USA)
33mm
 51401-470-751 565.2mm, 556.6mm
N/A
N/A
N/A
1981-82 CX500 Custom (USA)
35mm
 51402-449-751 503.1mm, 495.1mm 51401-449-751 100.7mm, 96.7mm
11-1108
eBay, AMA
FRSP S2341
FRSP S2534
1981-82 CX500 Custom (AU)
33mm
 51402-449-711
?
 51401-449-711
?
All Years CX400 Sports
37mm
 51401-MC5-611 458.9mm, 449.7mm 51402-MA6-003 <-- Spacer, not spring
All Years CX500 Sports
37mm
 51401-MC5-611 458.9mm, 449.7mm 51402-MA6-003 <-- Spacer, not spring
All Years CX500 Turbo
37mm
 51401-MC7-003 469.1mm, 455.0mm 51402-MA0-771 <-- Spacer, not spring
11-1100
eBay, AMA
FRSP S2938
All Years GL500, GL500I
35mm
 51402-MA1-003 508.1mm, 493.0mm 51401-449-751 100.7mm, 97.7mm
11-1111
eBay, AMA
FRSP S2341
FRSP S2534
All Years GL650, GL650I
37mm
 51402-ME2-003 466.9mm, 451.8mm 51401-ME2-003 123.6mm, 120.6mm
11-1100
eBay, AMA
FRSP S2938
All Years CX650 Custom
39mm
 51401-ME8-003 498.3mm, 483.4mm 51402-ME9-003 <-- Spacer, not spring
All Years CX650 Eurosport
37mm
 51401-MG0-003 480.5mm, 470.9mm
N/A
N/A
FRSP S2938
All Years CX650 Turbo
37mm
 51402-ME7-003 571.4mm, 560.0mm
N/A
N/A
11-1100
eBay, AMA


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