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Yamaha's iconic Blue Spot calipers are a great set of stoppers and are often bought second hand from breakers to upgrade the brakes on older bikes such as the FJ1200, onto which they bolt straight on.
The problem is that people don't change their brake fluid as often as they should and these brakes suffer from corrosion. When corrosion gets behind the seals, they are forced against the pistons seizing them. As these calipers can't be split you can't use a standard piston removal tool so you are stuffed. When the calipers were made they were line bored and plugs inserted, which are secured in place with the 'blue spot' nuts for which there are no tools available. Yamaha claim in their manuals that they can't be taken out and death will be the reward for those who try :)
In reality they can be taken out with this tool and a 22mm socket/ring spanner. This British made tool from Laser Tools is machined from aluminium so that it is less likely to mark the soft 'blue spot' nuts.
There is an 'O' ring sealing the plug behind the blue nut, which Yamaha do not supply, but we can! The cynical amongst you might think that Yamaha are better off selling a whole new caliper, but we couldn't possibly comment! We must however emphasize that these are NOT standard 'O' rings. Standard 'O' rings are not compatible with DOT 4 brake fluid; use them and Yamaha's warning might be brought home. Once the plugs are out it is easy to drive out the outer seized pistons with a drift and the inner ones can be removed with a professional brake piston removal tool. If the pistons are well stuck you might need a collet style tool. Gently warming the caliper with a heat gun will help as will liberal use of ACF50.
- Regular price
- £23.25
Yamaha's iconic Blue Spot calipers are a great set of stoppers and are often bought second hand from breakers to upgrade the brakes on older bikes such as the FJ1200, onto which they bolt straight on.
The problem is that people don't change their brake fluid as often as they should and these brakes suffer from corrosion. When corrosion gets behind the seals, they are forced against the pistons seizing them. As these calipers can't be split you can't use a standard piston removal tool so you are stuffed. When the calipers were made they were line bored and plugs inserted, which are secured in place with the 'blue spot' nuts for which there are no tools available. Yamaha claim in their manuals that they can't be taken out and death will be the reward for those who try :)
In reality they can be taken out with this tool and a 22mm socket/ring spanner. This British made tool from Laser Tools is machined from aluminium so that it is less likely to mark the soft 'blue spot' nuts.
There is an 'O' ring sealing the plug behind the blue nut, which Yamaha do not supply, but we can! The cynical amongst you might think that Yamaha are better off selling a whole new caliper, but we couldn't possibly comment! We must however emphasize that these are NOT standard 'O' rings. Standard 'O' rings are not compatible with DOT 4 brake fluid; use them and Yamaha's warning might be brought home. Once the plugs are out it is easy to drive out the outer seized pistons with a drift and the inner ones can be removed with a professional brake piston removal tool. If the pistons are well stuck you might need a collet style tool. Gently warming the caliper with a heat gun will help as will liberal use of ACF50.
- Regular price
- £23.25
Let customers speak for us
Love this item ,I've already used it & I'm sure it'll be my go to kit
Fantastic bit of kit, great price, very handy to have small enough to keep in the top box.
Well pleased thanks
Very good quick delivery as usual and nice sweets
Worked a treat, but some millimetre graduation marks on the tube would be useful.
It is very easy to use and understand, and I say this because I've no experience with electrics, and it's safe to use. I was also impressed with the build quality.
excellent value.- fits in the tiny space under my seat - brilliant service as usual from BikersToolBox
An extremely useful addition to my toolkit
It's a very neat little set, seems well made, 6 point sockets are a good thing. It's a pity that there wasn't a 14mm socket, rather than the very small ones. It took me a little while to work out how to release sockets from the ratchet head, press the little button, doh... Which raises an issue with the ratchet mechanism. If you are using the tool in the T handle mode, as a screwdriver for example, it is not possible to change the ratchet direction without releasing the Roto Lock clamp and angling the ratchet head to access the direction change control on the rear of the head. Neither does it seem possible to lock the ratchet in a middle position. Unless I am being particularly dense, of course.
These soft jaws are brilliant because they be fitted and removed very easily.
No damage or marking of parts and they grip very well indeed.
Highly recommended
Great tool, so easy to use and a perfect crimp every time. Should have bought this tool years ago. Well worth the money
Always brilliant, just when you think all is lost "Bikers Tool Box" saves the day. Thanks.
exactly what I wanted No more stripped out screw heads Will be using them shortly
Bloody good piece of kit, expensive because I had it shipped to france, but worth it, plus I got another sticker and some sweeties 😃 would recommend
