Details
Standard size of idle mix screw thread is M7 x 0.75
When the M7 screw thread is damaged, it can be enlarged to M8 x 0.75.
Drill size is 8 - 0.75 = 7.25 mm.
Drilling and cutting the M8 screw thread should be left to a specialist: the new screw thread must be perfectly aligned with the bore in the carburetor housing.
Only half of this over-size idle mix screw has M8 x 0.75, so the original M7 jam nut, sleeve and cap are maintained.
Idle mix screw thread repair - YouTube
A 7.2 mm drill and M8 x 0.75 mm tap can be found here: M8drill-tap
Additional Information
| Main Group | 13 Fuel system |
|---|---|
| Part Number | 0039181.M8 |
| Part Number | 13110039181.M8 |
| Motorcycle Model | R26, R27, R51/3, R67, R67/2, R67/3, R68, R50, R50/2, R50S, R60, R60/2, R69, R69S |
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