Front ABS sensor Housing - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 9 (permalink) Old 07-02-2020, 02:28 PM Thread Starter
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Front ABS sensor Housing

Hello everyone.

I am a relatively new FJR owner and have a used 2016.
I needed new tires so I ordered them and took the wheels to a local dealer to put the new tires on.
After installing the wheels I took the bike out for a short ride. I noticed that there was a clicking when I applied the brake sometimes.

After examination I noticed that the front ABS sensor housing on the left side of the front wheel could rotate slightly. There is a boss on the left lower fork that fits into the notch on the sensor housing as described in the service manual but has some clearance.

Prior to the tire change the housing did not rotate - at least I don't remember it doing so.
Does anyone have any ideas as to if this is normal or not?

Thank you for your time, Joe
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post #2 of 9 (permalink) Old 07-02-2020, 03:50 PM
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Perfectly normal to have a little tick-tick-tick from the front brake when slowing at a near stop. Over the years I've used 4 different brake pad mfr and they all do it. If the notch of the ABS sensor is at the little tab everything is fine but yes, there is room for slight movement there.

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post #3 of 9 (permalink) Old 07-02-2020, 05:16 PM
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I have a 16 and neither the front or rear ABS housing moves. At least not by hand. Is the rear housing moving as well? You might want to check the torque on the front axle bolt. Regarding the clicking noise from the brakes while engaging them at low steed, that is normal.

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post #4 of 9 (permalink) Old 07-02-2020, 05:45 PM Thread Starter
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Thank you both.

I double and triple checked everything and everything is to spec.
The rear sensor housing has a tighter fit between the tab of the brake bracket and the notch on the aluminum housing so there is no movement whatsoever on the rear one.

The front one has a generous amount of clearance between the boss and the notch in the sensor housing.

Seems like it would be normal to me.

Thanks again, Joe
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post #5 of 9 (permalink) Old 07-02-2020, 05:55 PM Thread Starter
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I don't believe it is the brakes. It is the aluminum housing that holds the hall sensor. Please see my pic attached. I can rotate the housing very slightly. It seems normal to me. Do you think so as well?
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File Type: jpg ABS sensor housing movement.JPG (109.5 KB, 11 views)
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post #6 of 9 (permalink) Old 07-02-2020, 07:32 PM
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I don't think you should be able to move the sensor housing. I think the pinch bolts which clamp the axle have been tightened before the big axle nut was tightened up, instead of after. I would loosen the pinch bolts on both fork legs, re-torque the big axle nut, then re-torque the pinch bolts.
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post #7 of 9 (permalink) Old 07-02-2020, 09:54 PM
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Agree with Bernie, undo the pinch bolts, hold the axle on the internal hex end, use a bolt with a 19mm head IIRC and two jam nuts, or get a special tool. Snug up the axle bolt and torque to spec, then snug up your pinch bolts.
Clicking can be pads, but the spring clips should prevent much of that. The rotors however are on floating rivets and when clean, you can rotate the rotors back and forth and hear them click... that too will subside when road crud reduces the clearances.
To clean the rotor rivets, you can give them a spray of say brake cleaner, use a suitable tool/larger screwdriver to spin the rivets.
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post #8 of 9 (permalink) Old 07-03-2020, 01:46 AM
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I vote with Bernie. The left pinch bolts were tightened before the axle end-bolt. Loosen the pinch bolts and my guess is you will find the left end axle bolt is now loose. Tighten the axle bolt then the pinch bolts. Then go to the right side and loosen those pinch bolts and let the forks find their natural distance apart before tightening.

The distance between forks is set by the right pinch bolts. The axle loads the bearings and takes up slack in the spacers with the end bolt on the left side.

Do not over torque the pinch bolts. Too tight will pinch so much the threads will not be square to the pinch bolt head's seat. The bolt will bend, and bend as it is turned. Repeated bending cold works the steel until it breaks. In the 1970's this was the scourge of kick starters and gear shift levers on Japanese motorcycles.

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post #9 of 9 (permalink) Old 07-10-2020, 09:47 PM Thread Starter
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FYI....It certainly helps when the dealer returns the left spacer when they change the tires.

But they did not. It was my fault actually. I only had noticed the right hand spacer.

Called the dealer and they called me right back. Saved me $20.

Oh well. Lesson learned.

Thanks, Joe
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