Damaged radiators are never easy to repair, even by professionals. The results can be patchy and quite often lead to more leaks later, or worse, blockages!
Lime scale deposits are also difficult to remove and reduce the efficiency of the radiator markedly.
Sometimes the best option is simply to renew the radiator, and although expensive costs a lot less than the damage caused by an overheating engine.
Replacing all the ancillary parts at the same time would allow the radiator to function perfectly, and would also improve the eye-appeal factor!
Related engine coolant parts you may wish to consider:
The more new replacement parts used the more effective the cooling system will be.
Add as many items as you wish to the same shopping cart, new hose-clips 90467100399046708021 and fasteners 97007050129581106012 for example, and still only pay the same single fixed price shipping cost.
Please note: this component may have other applications in the Yamaha model range.