Easy way to fix speedo with GSXR front

The problem I have is I got Braking Wave discs fitted to the front, they have ten rivets so the four magnets will be out of alignment unlike Chris' OEM discs above which have eight rivets.

Depending on the year of bike will depend how many magnets you need, Curvy's and early Pointy's need four magnets while the later (think it starts at K6) will need eight magnets.

Northwind's bike


I have not tried mine yet, I have not rigged up the sensor, but Northys bike above has the rivets glued to the rear disc. As you can see they are not evenly spaced, but one full rotation send four (or eight depending on model) pulses.

As to its accuracy with uneven magnets I can not comment yet.

Originally Posted by Stu

I was always trying to work with the 5 brake disc bolts (front & rear) & never got a smooth readout.

Thats because it was five, not four or eight.

Originally Posted by Dangerous Dave

The problem I have is I got Braking Wave discs fitted to the front, they have ten rivets so the four magnets will be out of alignment unlike Chris' OEM discs above which have eight rivets.

Depending on the year of bike will depend how many magnets you need, Curvy's and early Pointy's need four magnets while the later (think it starts at K6) will need eight magnets.

I have a K5 and it needed 8 magnets. Also i cant comment on magnet spacing effect on readout accuracy or smoothness. This was the reason i looked around for OEM GSXR disks when i did the conversion to avoid any potential problems! Ended up getting brand new ones for less than alot of 2nd hand ones are sold at.

btw i glued my magnets in, all 8 of them and they are still there a few thousand miles later. I used one of the little hamlin sensors and it worked perfectly.

[Stu]

Originally Posted by Dangerous Dave

The problem I have is I got Braking Wave discs fitted to the front, they have ten rivets so the four magnets will be out of alignment unlike Chris' OEM discs above which have eight rivets.

my GSXR Brake discs appear to have 10 rivets. I thought they were OEM. Don't know where you/Chris got 8 rivet ones from

sorry i should have said on the K4/K5 GSXR front end the standard number of rivets is 8 - i'm sure it could be different on older or newer models

Originally Posted by Stu

my GSXR Brake discs appear to have 10 rivets. I thought they were OEM. Don't know where you/Chris got 8 rivet ones from

From the factory they had eight ('96-'02), the thing is there are many pattern part manufacturers out there.

How does you speedo run with uneven magnets on the rivets, or have you done it another way?

[dirtydog]

I don't Stus speedo does work, he just keeps going faster till he gets pulled by the police

[Stu]

Originally Posted by Dangerous Dave

From the factory they had eight ('96-'02), the thing is there are many pattern part manufacturers out there.

How does you speedo run with uneven magnets on the rivets, or have you done it another way?

My Gixxer front is 750 Y-K3 I believe, but the discs could be anything .
The speedo's now on the rear brake disc - not exactly on, but based on the 5 bolts with some attempt to space the 4 of them evenly.
The speedo's really not bad at all as regards being unstable & running off the rear it is more accurate i.e. doesn't overread like std.

Originally Posted by Stu

The speedo's really not bad at all as regards being unstable & running off the rear it is more accurate i.e. doesn't overread like std.

Aye, i have the OEM one rigged to the back wheel. Its been there since 2000 and so far has never needed to be looked at as it has been 100% reliable. I am thinking about changing the rear end, hence my switch to a sensor and magnets.

[dirtydog]

Right I've finally got around to buying a sensor to sort my speedo. I just need to work out what wires gto what, last one of these I did the sensor had 3 different colour wires coming from it but this one has 3 black wires, the middle one has a white trace on it too. It looks just like YCs one. Anyone care to enlighten me?

[yorkie_chris]

Mine had some VERY faint trace colours on it, and I just made an educated guess from the page on greeks sig, and the sensor datasheet.