Exhaust Cracking - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 13 (permalink) Old 08-28-2017, 03:47 PM Thread Starter
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Exhaust Cracking

Hi All
I have a strange problem I've not been able to find on the site.
While out on a ride on Sunday we stopped for a bit of breakfast and as I put the bike up in the stand I noticed a mark on the exhaust where the exhaust joined the down pipe.
On closer inspection the exhaust and bracket are cracked, you'll be able to see in the pictures I hope.
Is this anything anyone has seen before?
All comments gratefully received.

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post #2 of 13 (permalink) Old 08-28-2017, 04:40 PM
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Never seen that before on an FJR.

Has it hit something?

Maybe it can be welded before it falls apart, but with the carbon embedded in those parts that might be difficult. If you end up buying new parts, carefully check the alignment before bolting it up.

Steve

2005 Yamaha FJR1300A
2006 Yamaha FJR1300AE
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post #3 of 13 (permalink) Old 08-28-2017, 06:49 PM
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I have seen cracking like that on other bikes, but never on an FJR. It might be caused by cold water splashing up from wet roads and hitting the hot exhaust pipe, causing rapid and uneven cooling. Alternatively, it may be caused by excessive engine vibration, or by excessive movement of the engine relative to the bike's frame, causing strain on the exhaust pipe. I would carefully examine all engine mounting points, and as much of the frame as possible, for cracks or breaks that may be causing excessive flexing.

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post #4 of 13 (permalink) Old 08-28-2017, 10:26 PM
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You poor guys go through so much water and salt, and mud. If this was going to happen it would happen there.

I had messed up my headers by going over a curb and bought a set on Ebay. Over here they are dirt cheap and so are the used mufflers.

Perhaps when you pull the mufflers off, the header pipe might be salvageable.

Good luck.

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post #5 of 13 (permalink) Old 08-29-2017, 12:38 AM
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It does look like it could be salt has got in there - still never seen it on a FJR!

When you did your suspension linkage did you force the silencers to get the side stand bolts out? Just thinking if they were weak due to salt if you did this it may have cracked them.

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post #6 of 13 (permalink) Old 08-29-2017, 08:12 AM
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The band clamp appears to be cracked too... weird. I've never seen this before.

Ray
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post #7 of 13 (permalink) Old 08-29-2017, 03:41 PM
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Never seen anything like that, salt will not affect it as the system is stainless steel. Has the exhaust been removed at any tme ?
How many miles has it done ? Looks like a trip upto Groombridge for a new one at 1000 OUCH !
If you do make sure they order the correct side as when I caught mine on a bolt sticking out from a gate they ordered the wrong side, fortunately another member of staff remembered me ordering it.
You could check that the system is fitted properly - no loose bolts.

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post #8 of 13 (permalink) Old 08-29-2017, 04:45 PM Thread Starter
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Cracked Exhaust

Hi Guys

Thanks for the replies, I'm not aware of hitting anything and the bike is vibration free.

The bike has done about 56000 miles and personally I never had any reason to remove or force the exhaust, it doesn't appear to be leaking and I have considered fitting 2 new clamps to cover the whole area.

It's very weird, I may be able to get it welded.
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post #9 of 13 (permalink) Old 08-30-2017, 11:26 AM
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Any chance someone tried to jack the front wheel off the ground while on the center stand and put the jack under the pipe and not the header?
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post #10 of 13 (permalink) Old 08-30-2017, 11:45 AM
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I'd say it is bad quality stainless/ and or welds. Corrosion is breaking clamps from expansion underneath clamp area. I have seen this type of corrosion in food plants stainless steel piping.
From the look of the pictures .....

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