CG125cc

Ed 81
Ed 81 Posts: 200
edited June 2007 in The Crudcatcher
Would any one be able to explain a whining noise coming from the engine after being reved high for say 1-2mins. I bought it with 230miles on clock and have been riding it easy for about 5-600 miles but seeing as its a cg125 it needs to be thrashed to get any where. The noise appears when its been ridden full throttle in top gear and am de-accelerating (the noise is in tune with engine braking) I have been told posabley a cam problem. The bikes only done 1500 miles. Any ideas any one?

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