How to adjust the valve clearance of Suzuki GS125?

1 Answers
MarleyRose
07/29/25 3:41pm
Here are the methods for adjusting the valve clearance of Suzuki GS125: 1. Adjusting the valve timing: For the GS125, align the T mark on the magneto with the arrow on the magneto cover. At this point, the O mark on the timing sprocket should be aligned with the top of the cylinder head. Behind the black circular cover on the left side of the camshaft, there are two "–" marks, which should be parallel to the plane of the cylinder head cover. Additionally, the two cams on the camshaft should be pointing diagonally downward at this time, indicating that the timing is correctly aligned. 2. Valve clearance: The valve clearance should also be adjusted at this time. The valve clearance for the GS125 is 0.08–0.13 mm, with the exhaust valve clearance slightly larger than the intake valve clearance. The valve clearance should not be too small, as it may cause air leakage, not only affecting power but also increasing wear on the valve rocker arms and camshaft.
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