If you are resealing and rebuilding your original fuel tap then you should also replace these too ????. They are the best available and fit inside the casting body of the tap.
Yamaha TZR125 TZR 125 TZR 150 Lock Set Ignition Barrel Key Petrol Cap UK
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Motorbike Cylinder Kit For TZR125 For TZR 125 DT125R TDR125 1991-2006 Motorcycle Parts 3MB00 56mm Engine Cylinder Kit Piston Gasket Ring Set
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Yamaha TZR125 DT125 R Haynes Manual 1987 to 1990 TZR125 DT125 R 124cc