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RC51's front brake master cylinder p/n ?

Old 12-14-2009, 06:59 PM
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RC51's front brake master cylinder p/n ?

sourcing RC51 front calipers and master cylinder for my '97 vtr 1000f.
found the calipers (year info pending).

trying to identify the correct master cylinder p/n to procure
and a source if anyone has one (used).
ebay stuff seems to be thrashed or misrepresented based on people's comments.

i recall seeing a reference to an online source for p/n's today during my hours of reading the forums here. but for life of me didn't record it.

all a bit fuzzy now.... help ?

RC51 front brake master cylinder p/n ?

I believe the calipers are rc51 calipers p/n 45150-MCF-D31 .

would year pertain to effectivity for my '97 ?
recall the 97-04 VTR's are pretty much the same for components.

any assistance greatly appreciated,

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Old 12-14-2009, 08:14 PM
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Hey James, Pm'd you again.'s microfiche will give you any part #'s you need. They show the same part #'s for all years for the RC51 for both the calipers and m/c.
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Old 12-14-2009, 08:26 PM
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SP-1s used a larger MC and calipers (same as 929) while the SP-2s used slightly smaller MC and caliper piston sizes (thought they look outwardly the same); same set-up as the 954.
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Old 12-15-2009, 10:52 AM
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Front Brake MC/Callliper size differences

Here is what I found in respective year mfgr repair manuals for the bikes.

From all the forum research I have done, I presume the improvements for the front brakes are increasing the size of the MC & Calliper pistons (RC51's more surface area) over the smaller diameter (RTV/VTR's) used on the early years mfgr.

Caliper OD 33.878 (1.338) and 31.948 (1.2578)
Master cylinder ID 19.05 (.750)

Caliper OD 30.148 (1.1869) and 26.918 (1.0598)
Master cylinder ID 14.00 (.5512)

So as an improvement to my '97 vtr I am sourcing the RC51 (SP1 / SP2)MC/Calliper's with larger dimensions.
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