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HxPaul wrote:I have a ScootRS inboard disc with sintered pads and thicker cable,set up as reverse pull.Fantastic brake,I have used it for a few years and never let me down.
Storkfoot wrote:HxPaul wrote:I have a ScootRS inboard disc with sintered pads and thicker cable,set up as reverse pull.Fantastic brake,I have used it for a few years and never let me down.
Thanks but I recall reading a post from a lad who had loads of issues sorting a ScootRS one out whereas the two original ones that I have set up have been very straightforward.
dave999 wrote:but they are cast aluminium alloy that has been stressed for 40 - 60 years....
Aluminium wheels used on race cars have their useful life measured in no. of race miles completed or no. of sets of tyres worn out...
i.e a set of Cast slot mag alloys on a 60s or 70s saloon car (race car) would be used for 10 12 sets of tyres then scrapped... (circuit racing rather than sprints/drag)
no such thing for street use...its not stressing them like race use, but most vehicles of the 50s to 80s were designed with the idea that they would last 5 of 6 years... not 50+
now i think if alloy front hubs, disc or drum, on lambrettas were failing due to stress fractures we'd know,it would be in the press, but i wouldn't want to be the first to find out.
old alloy really should be stripped and penetrant dye checked before you trust it with your life.
on a scooter with 3 times the original HP and pads that sometimes work way better than they did in the old days
The originals have lasted really well and there doesn't seem to be a problem... who's to say if the modern replacement parts will last as long...
BUT there does seem to be the odd problem with rear hubs, hence the series 2/spanish hub price differential.
a new replacement part from errr one of 2 places i guess.... SPAQ or mr Sacchi that potentially needs a modicum of re work to make it work right might be safer in the long run than spending the same on a collection of 50+ year old parts.
my view is based on race cars with alloy wheels and gearbox bellhousings that have been know to explode at speed. i don't have lambretta on the road with a disc brake....so might be a moot point....but 50 year old ally is ally....its not modern forged heat treated or hypereutectic aluminium alloy. its a soup of mainly aluminium cooked up at the lowest cost for a mass produced vehicle. perfect quality casting on day 1 will have degraded somewhat by day 22,000
maybe old back plate and actuator hardware, with new hub is the way to go... provided the disk pins and wheel studs are in the right place
dave
Storkfoot wrote: Where do you stop ?
steveg wrote:Storkfoot wrote: Where do you stop ?
I guess that depends n how reliable your brakes are
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