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Author Topic: Heat shield fatigue cracks  (Read 524 times)

AussieDave

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Heat shield fatigue cracks
« on: January 09, 2013, 12:44:57 AM »
The other day I started hearing a rattle from the exhaust and upon inspection found that the stock heat shield had developed cracks on either side of the tongue that extends over the pipe forward of the muffler. The cracks are about an inch long. Has anyone else had this happen? I guess its time to order the efi from hitchcocks,but to be honest I'm still a little skint from Christmas. Some wire is currently holding it in tension to stop said vibration.
"Glorious,stirring sight! The poetry of motion! The real way to travel! The only way to travel! ... O bliss ! O poop poop ! Oh my! Oh my!" - Toad of Toad Hall.

Arizoni

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Re: Heat shield fatigue cracks
« Reply #1 on: January 09, 2013, 01:08:21 AM »
Wire is good.

It has an 'old time' image that suits our old time bikes.

It also has much better heat resistance than the 'new time' duct tape so commonly found on the new bikes body panels.   ;D
Jim
2011 G5 Deluxe
1999 Miata 10th Anniversary

Desi Bike

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Re: Heat shield fatigue cracks
« Reply #2 on: January 09, 2013, 01:53:07 AM »
Mine did the same after 8000km. There is a clip under the heat shield that clips into the pipe at the front end of the shield. My clip was worn off causing the front of the shield to vibrate up and down until there were cracks on either side of the narrow bit of the shield. I ran a worm clamp (like the kind on auto radiator hoses) around the shield at the area until I was able to get a new shield. The noise went away as the clamp held the shield tight down on the pipe.
میں نہیں چاہتا کہ ایک اچار
میں صرف اپنی موٹر سائیکل پر سوار کرنا چاہتے ہیں

Ducati Scotty

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Re: Heat shield fatigue cracks
« Reply #3 on: January 09, 2013, 02:40:57 AM »
Mine did the same, makes an awful racket.  I replaced the broken clip with a piece of bent metal.  I cut the solid portion from a SS metal hose clamp and cut/bent it to shape.  I also replaced the allen head bolts with hex heads.

It held but I have since replaced it all with a reverse cone Emgo muffler and short heat shield over the pipe.

Scott

no bs

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Re: Heat shield fatigue cracks
« Reply #4 on: January 09, 2013, 07:33:58 PM »
i stuck a sportster muffler cuz the stock unit was not pleasing to the eye
killing bugs since 1972 2011 g5 deluxe

gremlin

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Re: Heat shield fatigue cracks
« Reply #5 on: January 11, 2013, 07:21:29 PM »
i stuck a sportster muffler cuz the stock unit was not pleasing to the eye

+1
1996 Trophy 1200
2011 RE B5
1979 XS11 w/vetter terraplane
1981 XS11 streetfighter
1983 Venture Royale
1982 CB750K
1971 Triumph Trident
1969 CB450
1966 Sears (puch) 250


trimleyman

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Re: Heat shield fatigue cracks
« Reply #6 on: January 14, 2013, 02:28:51 AM »
no bs, what model sportster? I have been looking for one with the cat ready for it's smog (it will eventually need one) as the cat in the original torpedo broke loose , hence the change to the ElectraX short bottle.
Now 2011 Royal Enfield G5
Then:-
1978 Ducati 900 GTES
1969 Ducati 350 Desmo Racer
1972 Mototrans Ducati 250 24 Horas
1965 Triumph Tiger Cub 200
1967 BSA Bamtum

gremlin

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1996 Trophy 1200
2011 RE B5
1979 XS11 w/vetter terraplane
1981 XS11 streetfighter
1983 Venture Royale
1982 CB750K
1971 Triumph Trident
1969 CB450
1966 Sears (puch) 250