Removed the carbs from the Fazer to give them a good clean and fit the servicing kit. Spent a not insignificant amount of time putting them back in, only to find that I'd forgotten to attach the throttle cables. I'm too young to be going senile so it could only have been blind stupidity.
Removed the carbs again while swearing excessively and then went looking for one of the cats to kick.
On one of my frequent foray's into gsxr engines (for tuning) I spent a day putting a hot and quite expensive engine together only to spot a barrel oil jet in the parts tub just after I had buttoned down the rocker cover
With no jet in there I wouldn't get the correct oil pressure which would result in a loud and expensive bang in a very short time, so off we go again ripping it all down again only to eventually find the jet just where is should be, followed by the realisation that I had rooted through another tub of spares for something else and this must have dropped out
much swearing and another Cometic head gasket sorted it but not for a few days until i could face doing it all again
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Mate building a 1260 gsx engine in his spare time at work, Falicon crank, balanced and peened rods, undercut gears decked and ported etc etc all of which cost thousands of pounds in parts alone never mind man hours , just as he buttoned it up another mate said "what are those bits in the box ?" (couple of washers and a gear selector)
My previously happy engine building mate went from zero to ballistic in 0.2 seconds flat and I moved swiftly away
A while later after peeling the engine builder off the ceiling the other mate admitted he had thrown the spare bits in the box for a laugh