The rear loop of the frame is different. I believe the D's (SR's) is shorter as the two grab rails are shorter as well. The mounting tabs from the B & C rear tailpiece are not present on the D (SR) either.
Also the SR's will be diffrenrt than the B models, as in the SR uses a disc brake in back and has the mount for the rear master cylinder (as does a C model) but the B having a drum back brake doesn't need the mount.
Rob
CANADA
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1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R
2005 z750s
