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  • 5,000 to 8,000 rpm has a lush feeling.... (YOSHIMURA: ST-1M Camshaft)
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【YOSHIMURA】ST-1M Camshaft Review
ST-1M Camshaft YOSHIMURA
YOSHIMURA
ST-1M Camshaft

Fits: HONDA Super Cub C125, HONDA Monkey125, HONDA GROM, HONDA GROM

Japanese Webike user
4/5

5,000 to 8,000 rpm has a lush feeling.

I have driven about 3,000 kilometers since the replacement, and the torque is very comfortable, and I enjoy it, even though it is natural that the engine life is getting shorter because I have to turn the engine so often. I can't drive on highways, but the Grom handles most of my long-distance touring. I have changed the Sprocket and tried various Final settings, but have not been able to find the best one yet.

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Other reviews
ST-1M Camshaft
YOSHIMURA
ST-1M Camshaft
Japanese Webike user
3/5

Effects that can be felt.

After running about 1,000 km, the camshaft has been stable from 6,000 rpm to 8,000 rpm, and it is like Yoshimura's. With the standard camshaft, the rpm was unstable, but it can keep 8,000 rpm all the time, especially on a steep uphill. The standard camshaft could only run about 50 km/h, but with the new camshaft, it can run about 70 km/h. View detail

ST-1M Camshaft
YOSHIMURA
ST-1M Camshaft
Japanese Webike user
2/5

Screw accuracy is low.

The Camshaft SprocketM8 Bolt's screw groove was not precise enough when installed, so I purchased an M8Tap separately and managed to clean the screw groove and install the bolt. View detail