Question about 2003 Yamaha YZ 125
In a 125, because of the high rpm's the engine is running, you should stick to a full synthetic 2 stroke oil at 32:1.
For gas, you should be running premium or at least 91/92 octane. This helps prevent pinging which can cause serious engine problems like trashing your piston, rings, cylinder.
Run tire pressure somewhere between 12-14 lbs.
Let me know,if needed further assistance.
Hope i helped you.
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Posted on Apr 25, 2010
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Posted on Jan 02, 2017
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