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CB750 / Nissin Caliper - Repair or replacement options?
« on: August 31, 2013, 03:52:22 PM »
Hi,
Right so I got myself in a bit of a mess when trying to bleed my rear brake as I was loosing a lot of pressure - it just wasn't breaking unless I pumped the brake at least 20 times.
The top part of the bleed nipple was broken and whilst trying to get out the remainder of the hollow screw with an easy-out, the easy-out broke staying stuck in the hollow screw. I tried to drill it out, using titanium drill bits but it didn't do much good and if anything I've now made a bad situation worse.
I spoke to a Nissin specialist who told me that basically the only way to do anything about it now would be to go to a spark erosion specialist - but he said they're expensive and would easily cost the price of a caliper - which is my other option.
Now this particular model of Nissin caliper (the stock one of my 77 CB750, I believe it's the 9V3 model) is not easy to come by. There are a few kicking about on ebay but I doubt that they would come in very good shape.
So I have a few questions:
- Has anyone used a spark erosion specialist and could share their experience (and perhaps details, particularly if they're in the London area)
- Has anyone replaced an identical caliper and if so with what.
I'm really looking for some input as I've been using only my front brake for the past few weeks and I really can't keep this up much longer!
Thanks!
Right so I got myself in a bit of a mess when trying to bleed my rear brake as I was loosing a lot of pressure - it just wasn't breaking unless I pumped the brake at least 20 times.
The top part of the bleed nipple was broken and whilst trying to get out the remainder of the hollow screw with an easy-out, the easy-out broke staying stuck in the hollow screw. I tried to drill it out, using titanium drill bits but it didn't do much good and if anything I've now made a bad situation worse.
I spoke to a Nissin specialist who told me that basically the only way to do anything about it now would be to go to a spark erosion specialist - but he said they're expensive and would easily cost the price of a caliper - which is my other option.
Now this particular model of Nissin caliper (the stock one of my 77 CB750, I believe it's the 9V3 model) is not easy to come by. There are a few kicking about on ebay but I doubt that they would come in very good shape.
So I have a few questions:
- Has anyone used a spark erosion specialist and could share their experience (and perhaps details, particularly if they're in the London area)
- Has anyone replaced an identical caliper and if so with what.
I'm really looking for some input as I've been using only my front brake for the past few weeks and I really can't keep this up much longer!
Thanks!