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Triumph Trophy
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Main Trophy Boards
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Maintenance, Servicing, and Mechanical
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Corrosion on Shaft Drive Arm
19 Aug 22, 13:06 pm
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Topic: Corrosion on Shaft Drive Arm (Read 880 times)
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ArfurD
Trophy Junior ‐
3
Topic Author
ArfurD
Trophy Junior
Topic Author
Posts: 3
Bike: Triumph Trophy SE
City / Town: Rugby
Corrosion on Shaft Drive Arm
on:
Aug 27, 2021, 03.14 pm
Aug 27, 2021, 03.14 pm
Hi,
I have this bit of corrosion type thing going on, on the shaft drive.
Is there something I can do to stop it?
and
Should I be worried about it?
TIA
Noggin
Trophy Pro ‐
112
#1
Noggin
Trophy Pro
Posts: 112
Bike: 13 plate Trophy SE
City / Town: Southampton
Country:
Re: Corrosion on Shaft Drive Arm
Reply #1 on:
Aug 27, 2021, 05.03 pm
Aug 27, 2021, 05.03 pm
Looks like Ali rot, I would scrap as much flaking paint off wire brush the Ali rot clean with some paint thinners etc then spary with some black smooth hammerite or simular, I'm sure someone else far more experienced then I will be along soon to give a more in depth view 😉
Various bikes, then I grew up !
1991 Triumph Trophy 1200
2010 Triumph Sprint GT
2013 Triumph Trophy 1215
digital
Trophy God ‐
2831
#2
digital
Trophy God
Posts: 2831
Trophy SE 1200
Bike: digital
City / Town: Barcelona
Country:
Re: Corrosion on Shaft Drive Arm
Reply #2 on:
Aug 27, 2021, 06.04 pm
Aug 27, 2021, 06.04 pm
As Noggin has said, if I should do that, but first, I would take the entire tapered case and rear brake caliper system apart, check the inside of both, apply grease to the points where they require grease, as well as the bolt. . which is attached to the swingarm rod and any area you think needs to be lubricated.
Disassemble the brake caliper, clean its interior, pistons, plates that hold the brake pads, etc. All that I think is not in good condition and corrosion has been able or has reached its interior. (it's like a bad apple).
It is also convenient before carrying out the work to check the condition of the conical box (cardan), placing the motorcycle on the central stand and with both hands grasp the tire and check from left to right and from bottom to top to see if there is movement . There are open threads about it.
Only motorcyclists know why dogs stick their head out the car window.
Novocastrian
Trophy Master ‐
680
#3
Novocastrian
Trophy Master
Posts: 680
Bike: TTSE
City / Town: Tynemouth
Country:
Re: Corrosion on Shaft Drive Arm
Reply #3 on:
Aug 27, 2021, 06.48 pm
Aug 27, 2021, 06.48 pm
After 67,000 miles on all weathers (posted also in our Trophy 1215 FB group), think this is just paint breaking up from the aluminium, just as we used to get on the previous 1200cc model of Trophy with the Black engines. Blast, or wire brush and repaint I would suggest.
Ken Hastie
TTSE, a handful of BSAs, a Vespa 300 and an MGB
Coconut
Trophy God ‐
10070
#4
Coconut
Trophy God
Posts: 10070
Bike: 2017 Trophy SE
City / Town: South Birmingham
Country:
Re: Corrosion on Shaft Drive Arm
Reply #4 on:
Aug 27, 2021, 07.01 pm
Aug 27, 2021, 07.01 pm
"Filiform Corrosion" ( Google it ! ) is fairly common,
fortunately it is usually only cosmetic and not structural.
Yours seems to be quiet a severe case and has probably been spreading
for several months or longer.
If the part can be removed from the bike it will give a better chance
of cleaning as much of the corrosion away as possible,
by wire brushing / sanding to get back to bare metal,
and using a suitable cleaning product such as Alubright Deoxidiser.
( Use with caution following manufacturers instructions ).
The surface should then be treated with a specialist Zinc-rich / Self etching Primer,
specified for use on Aluminium, before over-painting with a durable paint finish.
As
digital
mentions, you also need to check the rear Brake Caliper
and rear brake components for further corrosion, including the Hydraulic Brake pipe
which looks like it could do with a clean, and replace that if it is pitted or corroded.
I'd also consider, if parts on the back end are corroded like that,
what's the rest of the bike like ?
Check the Front Wheel Bearings, Front Brake Calipers, Front Fork Tubes,
Rear Suspension Unit Lower Linkage Bearings and Sleeves -
all of which may have been neglected and be in need of some TLC !
Cheers
HAVE YOU HAD YOUR IGNITION WIRING SAFETY RECALL INSPECTION DONE YET ?
( Click for details )
sin_tiger
Trophy Master ‐
518
#5
sin_tiger
Trophy Master
Posts: 518
Bike: Trophy SE Lunar
City / Town: Maybole
Country:
Re: Corrosion on Shaft Drive Arm
Reply #5 on:
Aug 27, 2021, 10.49 pm
Aug 27, 2021, 10.49 pm
He's not alone Coconut, mine looks pretty similar to that. It started showing signs of lifting about 1 month after the warranty ran out and other things started to pop up
Mine has not been neglected, washed after almost every ride, religiously during
and regularly treated with ACF 50, FS365 and XCP Rust Block, nothing seemed to make any difference to the corrosion progression. This isn't the place to go into further detail, so I'll stop there.
In the past I've buffed the flaky areas and spot painted but it's never lasted very long. I intend to strip the final drive, blast it and powder coat it properly, it'll probably need hot shot and possibly more than one coat to get a decent finish back.
For anyone contemplating this, do NOT use a steel wire brush, it will leave small particles of steel embedded in the alloy that will only accelerate further corrosion, use either a brass wire brush (not so effective being soft), a stainless steel wire brush or non metallic non woven abrasive pads (pan scrubber type material) or wheels. You can get small ones in various grades for small rotary tools, a flexible drive is useful.
HACKLE
Trophy Master ‐
1309
#6
HACKLE
Trophy Master
Posts: 1309
Bike: 2016 Trophy 1200se
City / Town: Trafalgar
Country:
Re: Corrosion on Shaft Drive Arm
Reply #6 on:
Aug 28, 2021, 12.42 am
Aug 28, 2021, 12.42 am
Probably all to do with the "salt/de-icing" stuff that's put on your roads over their in the UK. After 90k kilometres my bikes swinging arm drive area is like brand new.
HACKLE I'm too young to be this old.
FarRider #379
IBA Member #58060
digital
Trophy God ‐
2831
#7
digital
Trophy God
Posts: 2831
Trophy SE 1200
Bike: digital
City / Town: Barcelona
Country:
Re: Corrosion on Shaft Drive Arm
Reply #7 on:
Aug 28, 2021, 12.38 pm
Aug 28, 2021, 12.38 pm
I believe that it is also due to salt and thaw, it does not happen to me, it is always clean and when it rains some mud falls on it, but just by wiping it with a dry or slightly damp cloth it remains as good as new.
Only motorcyclists know why dogs stick their head out the car window.
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