UMA adjustable sprocket AAC R125 - MT125 V2 - XSR125

The UMA AAC adjustable timing sprocket allows you to adjust the ignition timing within a range of + or - 5 degrees, which is also more practical for catching up or occasionally setting a timing phase shift.
It is specially designed for Yamaha VVA UMA camshafts, Cardinals and certain other models with a 2-pin centring attachment.
Supplied with a decompression cam for easier starting with engines above 125cc.

LAB Fast125 technical tip:
- As a general rule, to improve power at low revs, advance the ignition timing, or delay it to shift power towards high revs.
- First set the timing on the marks and as originally set.
- Tighten the 3 screws to 0.45Nm + Loctite 248

Please look at the vehicle table below to see the possible assembly.

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