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Dirt Bike Brands - Other
2003 KTM triple clamp failures
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[QUOTE="dkmccarty5, post: 419149, member: 19677"] The KTM oem lower triple clamp is perhaps an aluminum "equiaxed sand casting". The cooling/solidification in this casting process is somewhat random - and results in a random grain pattern. Looking at some of the photos that have been posted the cracks are eminating from the stem hole - which could indicate a tolerancing issue between the stem diameter and the triple clamp hole diameter. The crack perhaps developed when the stem was pressed in. Once a crack has started in an equiaxed casting, it will typically follow the grain boundaries - and in the case of equiaxed castings, the crack will propagate along the boundaries until the part fails. Since the grain boundaries are small - and plentiful - it doesn't take much for the crack to grow - and the part to ultimately fail. We would all be wise to heed the KTM warning - and not ride the bike until it's fixed. KTM will be expeditious in a remedy. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
2003 KTM triple clamp failures
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