No Leaks and hub troubles
Time to do a final leak-down test. Most club toolkits have professional leak-down kits. I made my own several years ago from a blood pressure gauge and bungs from a homebrew shop, based upon an article written by Sticky for Scootering. There's no loss of pressure at all at 120 thingamy bobs. At 200 it holds for a good 30 seconds before the bung attached to the pressure gauge gets blown out. That's good enough for me. Note, leak-down testing should be done with the piston at bottom dead centre.
Time to do a final leak-down test. Most club toolkits have professional leak-down kits. I made my own several years ago from a blood pressure gauge and bungs from a homebrew shop, based upon an article written by Sticky for Scootering. There's no loss of pressure at all at 120 thingamy bobs. At 200 it holds for a good 30 seconds before the bung attached to the pressure gauge gets blown out. That's good enough for me. Note, leak-down testing should be done with the piston at bottom dead centre.
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Steve supplied some new hub studs to replace the too long ones I tried to fit before. These are the perfect size. The CASA Octopus hub has eight holes. I need to use the "standard" ones which don't have a recess. I debate with myself whether to use any stud-lock. These studs can be hard to remove, but then again I'll be torqueing the nuts on properly and so shouldn't ever strip them, plus they have decent depth and perfectly sized 12mm heads on them. Right, a small dab of stud-lock it is then, to stop the studs getting unwound instead of the wheel nuts when changing tyres...
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I bought new shoes to go with the new hub. It's interesting to see how these Scootopia shoes have the steel bit built in, rather than separate. Achieves the same end result...The size difference is just an optical illusion by the way.
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Once fitted it's clear they need skimming. They clear but there's virtually no free play on the brake lever.
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Time to fit the chain-casing. Well, so I thought. I put it on with 4 nuts and then, following the AF instructions, I want to turn the wheel to see if the kickstart is ratcheting in first gear. I'm pretty sure it won't. Anyway, I decide to hold the hub on with it's nut, just so I can turn the engine over in first easily (sparkplug removed following the leak-down test). With the nut on the hub is totally locked! And this is with the shoes removed. I can't work out where it's locking, so use an engineers pen to white-out the casing. Hmm, there's the rub!
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I try filing the area, but it doesn't make much difference. Looking at the hub I'm now not sure if the Indian casings are wrong or the CASA hub! Time to leave it so I don't fuck things up...Tomorrow I'll take the hub and shoes in to the brake specialist next to Motorini for skimming...Now it's time for a drink. This is turning in to a marathon build!
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