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| Model | Pump Cover No. | Pipe No. |
|---|---|---|
| CX500, all years GL500, all variants/years |
19221-415-000 | 19504-415-000 |
| GL650 CX650E CX650C |
19221-ME2-000 | 19504-ME2-000 |
| CX500 Turbo CX650 Turbo |
19222-ME7-000 | 19504-MC7-000 |
As far as using a 650 water pump cover on a 500 motor goes, the different parts actually have different impellers to match; see here. You may be able to replace the impeller/water pump cover in one go with the different model but changing the cooling system like that may have unintended consequences; pending further information we would recommend sticking to what came from the factory for your model.
We're working on getting comparative photos on these - stay tuned!
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