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The stock compression ratio for a 2003 Yamaha YZ85 is approximately 8.6:1.

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1y ago

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How fast is a 2003 yz85?

My friend bought a brand new 2003 YZ 85 and on the spec list it said that the stock speed was 66 mph


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A stock Yz85 is capeble 0f 64 mph. With proper upgrades, 70 mph can be achieved.


What is a 2003 YZ85?

2003 yz85 is a 2stroke motor cross bike with a 85cc motor or 85 cubic capacity engine you have to mix oil and fuel together


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2 stroke


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What is the spark plug gap on a 2003 YZ85?

The gap should be from .020"-.024"


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The stock sprocket sizes for the 2004 Yamaha YZ85 are typically a 13-tooth front sprocket and a 48-tooth rear sprocket. These sizes are designed to balance acceleration and top speed for the bike's performance. Always consult the owner's manual or a professional for specific tuning needs or modifications.


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