Finally brought my 900 home from the work bike shed where it's been sitting abandoned and unloved for far too long (started first time though once the battery was charged), and the front brake seems to be pulsing. With the wheel off the ground at a tiny bit of pressure on the lever there's definitely a lot more drag at one point of the revolution, but no obvious warp, rust or other damage. I plan to take the callipers off and make sure everything is moving ok, but could this be caused by a sticky calliper or is there another problem I should be looking for?
Pulsing Brakes
Started by
ChrisG
, Jun 16 2022 04:38 pm
12 replies to this topic
#1
ChrisG
-
- Supporting Member(thanks)
-
- 8,276 posts
Resident vulture
- Location:Netherlands
- TDM model: 2009
Posted 16 June 2022 - 04:38 pm
1992 Mk1, 76k miles, Hagon springs, MTC exhaust, 4½ gears Gone now 
2009 900 abs, 42k miles, Yamaha heated grips, double bubble screen, R&G crash bungs, scottoiler, Autocom, 1500 lumen LED spotlights.
#2
dapleb
-
- Root Admin(A)
-
- 18,118 posts
Monkey Boy
- Location:The home of morris dancin
- TDM model: 1990
Posted 16 June 2022 - 04:49 pm
Probably initially sticking caliper...can advance to warped disc pretty quick.
Also fits in with it being out of commission for a while.
Also fits in with it being out of commission for a while.
"Whats up", "Piston Broke", "Yeah me too...hic"
If you want to mark your location on the Carpe map: http://www.carpe-tdm...opic.php?t=5117
Doin valve clearances? Use dappers valve shim exchange program and the job will be carroty - Free (other than you postin me yer shims) for sporting members.
Active member of TPLQHCSRSFC and TSRMCMAS (even though a year off) and avid fan of PM not sent.
If you want to mark your location on the Carpe map: http://www.carpe-tdm...opic.php?t=5117
Doin valve clearances? Use dappers valve shim exchange program and the job will be carroty - Free (other than you postin me yer shims) for sporting members.
Active member of TPLQHCSRSFC and TSRMCMAS (even though a year off) and avid fan of PM not sent.
#3
PICARD
-
- Supporting Member(thanks)
-
- 1,744 posts
has been here 4ever
- Location:Wirral / wherever I lay my hat!
- TDM model: 2004
Posted 16 June 2022 - 05:04 pm
Yer floating discs may have sunk!!while the calipers are off, check the disc bobbins are all free and turning.
Lock onto my co-ordinates and beam me up !!
04 900 - 92 mk 1 - r 1150 rs - Z550 A1 - 2x bonnies - plastic slug -XL185 - ...not in that order !! (and one or two i don't want / dare to own up to !!)
04 900 - 92 mk 1 - r 1150 rs - Z550 A1 - 2x bonnies - plastic slug -XL185 - ...not in that order !! (and one or two i don't want / dare to own up to !!)
#4
Snowbird
-
- Supporting Member(thanks)
-
- 1,358 posts
Just won't go.
- Location:Often on another planet, but mostly south Cambs. (St.Neots)
- TDM model: 2000
Posted 16 June 2022 - 05:32 pm
Like wot he said!
Current toys: '99 XT600E, 2000 4TX, '82 Princess 30DS (where the username comes from), No longer a '03 Fazer thou.
Save the planet, it's the only one with beer!
#5
LAURENCEAUX
-
- Member
-
- 192 posts
Carpe fan
- Location:Kingston Upon Hull
- TDM model: 2009
Posted 16 June 2022 - 10:51 pm
The flat edge of an engineers ruler will expose warped/wavy disk.
#6
ChrisG
-
- Supporting Member(thanks)
-
- 8,276 posts
Resident vulture
- Location:Netherlands
- TDM model: 2009
Posted 17 June 2022 - 07:44 am
Probably initially sticking caliper...can advance to warped disc pretty quick.
Also fits in with it being out of commission for a while.
Only rode it 3km home and avoided using the front brake after the first time I used them and it pulsed, so hopefully no follow on issues. Plan to take the calipers off to make sure everything's clean and free as part of doing a service on it. Poor thing's probably only done about 20km in the last 2 years.
Yer floating discs may have sunk!!while the calipers are off, check the disc bobbins are all free and turning.
Any tips for freeing them if one is stuck? Is it just a case of sticking a big bolt in the hole and turning it, or might it need a soak in something and then I'll be forever paranoid I haven't degreased the disk sufficiently?
1992 Mk1, 76k miles, Hagon springs, MTC exhaust, 4½ gears Gone now
2009 900 abs, 42k miles, Yamaha heated grips, double bubble screen, R&G crash bungs, scottoiler, Autocom, 1500 lumen LED spotlights.
#7
dablik
-
- Supporting Member(thanks)
-
- 10,754 posts
Master Intermediate Fettlin' Award 2018
- Location:Bootleshire
- TDM model: 1992
Posted 17 June 2022 - 08:41 am
Nut and bolt Chris, just jam it up till it holds and rotate, use brake cleaner.
Bigred mk1 R1 Calipers- Braided lines- Givi wing rack-Crash bungs- Hi vis bullets-PR2's- and a hoot to ride.
Quad 900 Silver Laser duo tech pipes-Scott oiler-Engine crash bars- Radiator mounted see me ring LED's-Datatool system 3 alarm -Centre stand- Extender fender-Renthal bars-Handle bar risers-Mirror extenders-BMW GS Handgaurds-Acumen uprated horn & Nautilus-Stainless steel Radiator guard-Givi wing rack-OEM screen-Yammy touring screen-MRA Vario-MRA Double bubble cut down for fast as fk riding-Tiger screen-Tank protector-Stomp grip panels-Optimate lead Gone to Heaven 
1991 MK1 in need of some TLC watch this space Gone to Heaven 
Sorted and on the Road Mick 
it's the bike that Jack built 
#8
PICARD
-
- Supporting Member(thanks)
-
- 1,744 posts
has been here 4ever
- Location:Wirral / wherever I lay my hat!
- TDM model: 2004
Posted 17 June 2022 - 01:16 pm
Didn't see my lips move there...
Lock onto my co-ordinates and beam me up !!
04 900 - 92 mk 1 - r 1150 rs - Z550 A1 - 2x bonnies - plastic slug -XL185 - ...not in that order !! (and one or two i don't want / dare to own up to !!)
04 900 - 92 mk 1 - r 1150 rs - Z550 A1 - 2x bonnies - plastic slug -XL185 - ...not in that order !! (and one or two i don't want / dare to own up to !!)
#9
Bjørge
-
- Supporting Member(thanks)
-
- 1,792 posts
has been here 4ever
- Location:Asker, Norway
- TDM model: no more
Posted 17 June 2022 - 04:18 pm
I never got to free up my bobbins, so had to fix pulsing by servicing calipers. Worked every time😎
Bjørge
#10
ChrisG
-
- Supporting Member(thanks)
-
- 8,276 posts
Resident vulture
- Location:Netherlands
- TDM model: 2009
Posted 20 June 2022 - 08:45 am
Didn't see my lips move there...
But who's hand was inserted where?
Turns out I binned my collection of random old bolts and the like when I moved house so going to have visit the DIY store to buy 1 nut and bolt 
1992 Mk1, 76k miles, Hagon springs, MTC exhaust, 4½ gears Gone now
2009 900 abs, 42k miles, Yamaha heated grips, double bubble screen, R&G crash bungs, scottoiler, Autocom, 1500 lumen LED spotlights.
#11
fixitsan
-
- Supporting Member(thanks)
-
- 4,676 posts
Carpe Citizen
- Location:West Lothian
- TDM model: 2003
Posted 20 June 2022 - 03:18 pm
Nut and bolt Chris, just jam it up till it holds and rotate, use brake cleaner.
Or even brake fluid itself, which is a great penetrant, missus !
900 with better bits. Owes me nothing, Makes me smile
#12
ChrisG
-
- Supporting Member(thanks)
-
- 8,276 posts
Resident vulture
- Location:Netherlands
- TDM model: 2009
Posted 02 July 2022 - 02:11 pm
Finally got round to sorting this out. Put an M8 bolt (I reckon M10 might be a fraction too big but didn't have one to test) though each bobbin and made sure they all can turn. They're stiff but turn pretty easily with a ratchet on them now. Took the callipers off and cleaned up the pistons and greased the pins on the rear calliper mount. Not been for a proper test ride but had a quick roll down the path a couple of time and the pulsing seems to have stopped. Thanks for the advice.
Now I just need to wash it, change the brake fluid, change the oil and filter, clean and lube the chain, check the heated grips for shorts (fuse blown), and then maybe ride it.
Given that I've hardly used it in a couple of years, what else should I be looking at doing. Lube the shock mounts and wheel/head bearings?
1992 Mk1, 76k miles, Hagon springs, MTC exhaust, 4½ gears Gone now
2009 900 abs, 42k miles, Yamaha heated grips, double bubble screen, R&G crash bungs, scottoiler, Autocom, 1500 lumen LED spotlights.
#13
TonyDevil
-
- Supporting Member(thanks)
-
- 9,336 posts
seagull squadron leader & founding member of GoatTracKrew
- Location:Saarfend-on-Sea, Essex
- TDM model: 1991
Posted 10 July 2022 - 12:07 pm
Now I just need to wash it...
heresy!!!
Edited by TonyDevil, 10 July 2022 - 12:08 pm.
"Never argue with an idiot. They just bring you down to their level and beat you with experience"
My TDM :
Black 1991 850 MK1, 160k+ miles(ish, best guess really, gave up trying to keep count after 3rd set of clocks and 3rd engine), PilotRoad2 tyres, custom stubby exhaust system, bluespot calipers & goodridge braided hoses with dunlopads, maxton forks, Ohlins shock, kedo handguards, stainless TDM grill, Scottoiler with lubetube & dual nozzle thingy, Givi Wingrack2 with E45 & 2xE36s, renntec crash bars, Autocom with blueteeth & PMR radio, TomTom Rider2, Optimate IIIsp, Bagster tank cover, anti-dazzle coating
to fit : led spotlights, heated grips, new braided lines and rear caliper that actually has bleed nipples
Silver-ish 2003 900, 70k miles, PilotRoad3 front tyre (new@65k) & PR2 rear(new at 69k), Renthal 755 bars with KTM handguards, oxford unheated grips, power commander 3usb, scorpion titanium exhausts, standard screen with vario winglet thingy, stainless grill, oem centre stand, bagster tank cover, givi monokey topplate mounted on grabrail with V46 topbox, Givi PL pannier rails with E21s, crash bungs, mirror extender thingys, Halfords Advanced Laser Blue brillance bulbs, 21w led spotlights, touring scottoiler with leehenty dual nozzle, Autocom with blueteeth & PMR radio, TomTom Rider3 Urban, winter style anti-dazzle coating
to fit : led brake light strip, replacement heated grips
current rides : TDM850 3vd/mk1=tourer&scratcher, TRX850=weekend twisty toy, 2003 TDM900=commuter, 2005 TDM900=unmolested. Gone but not forgotton : XTZ750=overland touring toy, GS500e, GS125
If a strange looking truck driver honks at you & gives you the thumbs up, its could be me 
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users
