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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="Martyn Goodwin" data-source="post: 75963" data-attributes="member: 2433"><p>only slightly off topic - about 15 years back I purchased a brend new Yamaha YP250 motor scooter. The rear tyre only lasted about 1,500 miles till it was toast. The replacement tyre/wheel was dynamically balanced and off I went a short time later one of my riding chums commented about the back wheel of my scooter jumping about like a kangaroo! I was unaware of it I assume because of the high unsprung weight and very compliant rear suspension. On subsequent checking I found the cast aluminium rear wheel (not the tyre) seemed to be out of round; what was actually wrong was that the axle hole in the wheel had been machined off centre. It was replaced under warranty - THREE TIMES. Why 3? well it took that number of replacement wheels till the dealer came up with a wheel (less the tyre) that was a) actually round and b) had the axle hole in the centre.</p><p></p><p>Even with 'modern' bikes from reputable makers it still pays to check the wheels with care.</p><p></p><p>Martyn</p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 75963, member: 2433"] only slightly off topic - about 15 years back I purchased a brend new Yamaha YP250 motor scooter. The rear tyre only lasted about 1,500 miles till it was toast. The replacement tyre/wheel was dynamically balanced and off I went a short time later one of my riding chums commented about the back wheel of my scooter jumping about like a kangaroo! I was unaware of it I assume because of the high unsprung weight and very compliant rear suspension. On subsequent checking I found the cast aluminium rear wheel (not the tyre) seemed to be out of round; what was actually wrong was that the axle hole in the wheel had been machined off centre. It was replaced under warranty - THREE TIMES. Why 3? well it took that number of replacement wheels till the dealer came up with a wheel (less the tyre) that was a) actually round and b) had the axle hole in the centre. Even with 'modern' bikes from reputable makers it still pays to check the wheels with care. Martyn [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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