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30/06/2014: Yamaha Past Masters race bike fuel tank

The Yamaha Past Masters series is designed to keep old two stroke bikes from the 1980s and 1990s racing. The bikes are all ridden as they were designed to be ridden, which does mean that on occasion things break.

Even more insidious is the onset of rust in fuel tanks, which is a universal problem, clogging fuel lines with debris and even when meticulous filtration is applied, causing engine seizures as two strokes are fairly sensitive to lack of fuel, especially as it carries their vital lubricant.

The rider of this bike was at his wits’ end when we suggested a simple solution. Our answer was to cut the bottom out of the rotten old steel tank, fabricate a ten litre alloy tank to sit underneath, then simply bolt the old one on as a cover to keep the bike’s silhouette in keeping with the regulations and spirit of the class.

Simple! With the cover in place now, nobody would ever know it wasn’t a standard tank, and the rider is as pleased as punch as he has lovely clean fuel flowing into his carbs.

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