Thursday, 10 April 2014

The dreaded Norton 'pinch bolt crack'

Noticed that the LH fork slider on the ES2 has cracked at the bottom pinch bolt area - not me i hasten to add as I'm well aware that this is a common failure as the pinch bolt can get over tightened. The recommended torque is something like 15ft lbs, and on the Commando I remember putting a washer in as packing so that it couldn't get overtightened.

You don't want to see this crack on your Norton single. I've slackened the bolt off to make the crack wider and more visible for the picture as you had to get up close to see it.
Anyhow, found a place in Lincoln that was willing to repair it - http://www.paintperfectlincoln.co.uk/ - Only around the corner, had a chat with them and they also have a dip tank big enough for bike frames and have done a number of motorcycle jobs in the past, so might give them a try when its time for the Commando frame etc next winter.

Many LH fork legs end up looking like this - ally weld repair.
Fork leg stripped down o.k, nothing to them really and even more basic than the Commando's. Fork oil changed and replaced with Castrol TQF.
Also did oil change on the engine as I wasn't sure when it was last done, but looking in the drained oil tank revealed a fair amount of sludge so off it came for a clean out before refilling with Castrol Classic GP50.
Been meaning to have to take a look at the pipe joints and drain plug as there's been a bit of oil weeping - copper washers I reckon that had been re-used but not annealed. So a quick blast of the washers with the propane torch and the tank's leak free now, so not so many drips on the garage floor now.

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