Curious one - thought it had just started running on one cylinder with failed plug/coil, nothing unusual for me, stopped to check and rear cylinder/exhaust header cold but lots of oil on lhs (from starter motor area), TB, top of rear cylinder and, particularly, rear crankcase and exhaust header.
Home courtesy of SOS breakdown recovery (I'm one of their known regulars) and strip down starts tomorrow.
No. 47
2015-05-06 21:53:00 UTC
bazz21
2015-05-07 03:48:00 UTC
hope its something simple i feel for you cheers bazz
ktmguy
2015-05-07 04:39:00 UTC
Sad to see another issue! How many miles now mate?
No. 47
2015-05-07 15:43:00 UTC
Race miles plus circa 85k road miles but only circa 20k miles on 'new' engine.
bruders8146
2015-05-07 18:18:00 UTC
if i can help in any way give me a shout
No. 47
2015-05-07 18:46:00 UTC
Ta - hoping that it's just failed rear cam cover oil seal filling spark plug shaft and pumping out via lhs drain hole, wind blown onto top, sides and rear of rear cylinder - can't think of any other theoretical cause given evidence but..............
ktmguy
2015-05-07 21:36:00 UTC
Post missing.
No. 47
2015-05-08 11:16:00 UTC
Ho hum.......damaged rhs inlet valve seat, bent plug electrode so there's unwanted metal in the rear cylinder - nothing obviously fallen in from the inlet tract - so it's engine out again and strip down of rear cylinder.
No. 47
2015-05-08 12:24:00 UTC
Post missing.
No. 47
2015-05-08 13:20:00 UTC
No. 47
2015-05-08 18:38:00 UTC
Engine out and off to Paul R tomorrow - far more experienced eye than mine when it comes to engine internals - should use the opportunity to replace front forks and swing arm bearings, I guess.
Colonel_Klinck
2015-05-08 18:50:00 UTC
Oh dude that looks all too familiar to me Hope there isn't too much damage to piston, head and bore.
No. 47
2015-05-08 19:02:00 UTC
Know of any good SDRs for sale?
Colonel_Klinck
2015-05-08 19:50:00 UTC
LOL funny you should mention that.... Fingers crossed it hasn't done too much damage m8.
bruders8146
2015-05-09 06:11:00 UTC
keep us posted mate!!
ktmguy
2015-05-09 08:28:00 UTC
Not good, was hoping it would be something minor.
Hopefully fixable without too much drama!
Hopefully fixable without too much drama!
No. 47
2015-05-09 13:22:00 UTC
Work in progress.........................
Aphex
2015-05-09 20:31:00 UTC
Post missing.
No. 47
2015-05-10 11:07:00 UTC
Post missing.
Colonel_Klinck
2015-05-10 17:13:00 UTC
Gutted for you. At least the bore survived. Small comfort I know.
No. 47
2015-05-10 19:21:00 UTC
As I said in your similar thread, just surprised there was so little mechanical noise, just felt like failed plug/coil pack - bore conclusion preliminary only, based on quick check and need to look below piston, etc.
Colonel_Klinck
2015-05-10 22:11:00 UTC
Sounds like yours was much more gentle though. My engine stopped very quickly and without the slipper clutch I'd have been off as I was in a corner doing 70 and accelerating hard when it went. I think all those revs were what did so much damage on mine tbh.
No. 47
2015-05-11 18:54:00 UTC
Anyone know if anywhere, in UK preferably, has black Samco hose kit for SDR in stock? Being quoted 4 weeks delivery by usual sources.
shadowman
2015-05-11 19:08:00 UTC
I got one delivered in a day or two, not branded samco but side by side they were identicle.
I wil look up the supplier and let you know.
I wil look up the supplier and let you know.
shadowman
2015-05-11 19:16:00 UTC
Shove this into eBay. Pictures show orange hoses but I ordered black and got them in days. Identical to the Samco hoses that came off the bike.
161569265874
161569265874
No. 47
2015-05-11 19:19:00 UTC
Ta - but whilst they looked the same, were they Samco/same quality?
shadowman
2015-05-11 19:50:00 UTC
Side by side they looked and felt identical. I'm no expert on silicon hoses of course but I doubt there is any real difference.
No. 47
2015-05-12 12:32:00 UTC
Bore is also shot, unfortunately, so looking at +£2.2k in new parts, etc............time to strip down the original engine and check condition of rear cylinder, methinks.
Colonel_Klinck
2015-05-12 18:24:00 UTC
Post missing.
No. 47
2015-05-12 19:24:00 UTC
Aye, will strip down and inspect but assuming that it 'survived' the broken plug episode, plan is to put new valves, springs, etc into the 65K miles rear cylinder and stick it on the 20k miles motor - SDR exhaust valves £45 each, inlet valves £145 each apparently....................................
990RR
2015-05-14 09:20:00 UTC
sorry to hear bro
ktmguy
2015-05-14 10:43:00 UTC
Post missing.
No. 47
2015-05-14 11:01:00 UTC
Ta - have contacted Delwest direct.
bazz21
2015-05-15 09:03:00 UTC
do all the 990 have titanium valves or only the sdr
Colonel_Klinck
2015-05-15 14:27:00 UTC
Post missing.
No. 47
2015-05-15 15:23:00 UTC
Post missing.
bazz21
2015-05-15 17:01:00 UTC
Note to self, order ti valves next time I pull apart the engine.
No. 47
2015-05-16 06:18:00 UTC
Post missing.
bazz21
2015-05-16 11:25:00 UTC
Can't find valve head, though, so assuming blown out of exhaust port.
No. 47
2015-05-16 11:48:00 UTC
my word that did do a lot damage ,wheres the spring from , id be checking con rod too for straightness , i feel for u man , cheers bazz
Aphex
2015-05-16 12:17:00 UTC
Valve spring.
No. 47
2015-05-16 16:28:00 UTC
What do you think caused it?
bruders8146
2015-05-16 16:33:00 UTC
Valve stem failure probably.
Motogoon
2015-05-16 19:21:00 UTC
Holy sugar! That quite something!
So what's the plan?
So what's the plan?
No. 47
2015-05-16 20:09:00 UTC
How many miles had those valves done?
No. 47
2015-05-17 08:21:00 UTC
Post missing.
ktmguy
2015-05-17 08:22:00 UTC
Post missing.
No. 47
2015-05-17 09:56:00 UTC
Ay caramba, that's pretty bad!
Not usual to let go that way!
Not usual to let go that way!
Colonel_Klinck
2015-05-25 08:57:00 UTC
Bent con rod so complete strip down underway...............................
No. 47
2015-05-25 10:46:00 UTC
Man thats ordinary news. Good luck to you.
No. 47
2015-05-25 12:18:00 UTC
Ouch, messy.
Valve spring broke letting valve drop and hit piston would be my guess.
New set of springs all round? Are they the originals?
Valve spring broke letting valve drop and hit piston would be my guess.
New set of springs all round? Are they the originals?
No. 47
2015-05-25 13:09:00 UTC
Yep, afaik they're the originals - engine was bought used.
xrpilot
2015-05-25 18:27:00 UTC
Post missing.
bruders8146
2015-06-12 15:31:00 UTC
No. 47
2015-06-12 15:46:00 UTC
Post missing.
bruders8146
2015-06-13 17:12:00 UTC
Any pics..I love a good pic
No. 47
2015-06-15 18:33:00 UTC
Pics of what?
No. 47
2015-06-15 18:40:00 UTC
thought you may of had some rebuild pics
No. 47
2015-06-15 20:30:00 UTC
Not of engine work but rebuild manual shows it as it is.
ktmguy
2015-06-15 20:33:00 UTC
Post missing.
chip
2015-06-18 11:02:00 UTC
Another trophy objet d'art for my collection:
No. 47
2015-06-18 23:12:00 UTC
Post missing.
Harlequin
2015-06-20 11:54:00 UTC
Post missing.
No. 47
2015-06-20 14:54:00 UTC
'Tis back on the road.
Motogoon
2015-06-21 06:35:00 UTC
Well done!
ktmguy
2015-06-22 19:46:00 UTC
Back on side of road again with dead m'cycle - started cutting in and out, one cylinder occasionally two, no smoke, no oil, no mechanical noise - bad plug or coil, methinks, and carry on - five/six miles later, dies and won't turn over on starter motor - battery fine and breakdown truck's battery pack can't crank engine either - thinking starter motor relay..........hopefully.
No. 47
2015-06-23 03:35:00 UTC
You must be a patient man to put up with the crap that bike's given you, I'd be so pissed off by now it'd be down the road if it was me (probably why I'm on to my 37th bike at 41 years old!) Hope it's nothing major for ya again
ktmguy
2015-06-23 07:58:00 UTC
Post missing.
bruders8146
2015-06-23 08:39:00 UTC
Not sure I understand - gut feeling is that it's a failing starter relay allowing enough power for the lights, horn, etc but not for ignition circuit or starter.
First check will be to bypass the relay and hot wire the starter, I guess.
First check will be to bypass the relay and hot wire the starter, I guess.
No. 47
2015-06-23 22:55:00 UTC
Post missing.
Aphex
2015-06-24 06:59:00 UTC
Could you to put a muti meter on the starter to see if it's getting the correct voltage?
Hope it is something simple but as soon as it's running I would double check everything, seems very bad timing for something to go wrong after a very recent rebuild.
Hope it is something simple but as soon as it's running I would double check everything, seems very bad timing for something to go wrong after a very recent rebuild.
bruders8146
2015-06-24 17:31:00 UTC
Front cylinder plug.............................
......................looks like front cylinder may have dropped an exhaust valve less than 75 miles after the rear cylinder dropped one - engine is locked up this time though.
Engine out and strip down underway.
......................looks like front cylinder may have dropped an exhaust valve less than 75 miles after the rear cylinder dropped one - engine is locked up this time though.
Engine out and strip down underway.
No. 47
2015-06-24 19:36:00 UTC
Sh*t happens, just gotta get on with it - Guinness and Gitanes help.
Colonel_Klinck
2015-06-24 19:42:00 UTC
Jesus m8
No. 47
2015-06-24 20:06:00 UTC
Aye, OE engine rebuild will have to be postponed.
ktmguy
2015-06-25 00:11:00 UTC
Shit! I thought you changed all the valves!
Sure it is not a detonation issue that causes this?!
BTW Gitanes... spew... I was under the impression that only the Legionnaires smoked this stuff
Sure it is not a detonation issue that causes this?!
BTW Gitanes... spew... I was under the impression that only the Legionnaires smoked this stuff
No. 47
2015-06-25 06:47:00 UTC
New valves and springs to 65k miles replacement rear cylinder, 20k miles front cylinder decarboned and valves lapped only.
Electrical glitch was due to a faulty ECU - replaced and no similar issues since.
Both yellow (Mais) and white Gitanes for me - not the same as they used to be, sanitised to suit the Americanised French taste trend and no longer available in UK - worth persevering with though, just like KTMs..........
Electrical glitch was due to a faulty ECU - replaced and no similar issues since.
Both yellow (Mais) and white Gitanes for me - not the same as they used to be, sanitised to suit the Americanised French taste trend and no longer available in UK - worth persevering with though, just like KTMs..........
ktmguy
2015-06-25 08:30:00 UTC
Post missing.
Colonel_Klinck
2015-06-25 10:53:00 UTC
I thought you weren't meant to lap titanium valves as it removes the coating from valves and seats??
No. 47
2015-06-25 15:08:00 UTC
Aye, just the exhaust valves.
No. 47
2015-06-26 12:42:00 UTC
Engine out - snapped exhaust valve stem is all I can see at moment - engine strip tomorrow.
No. 47
2015-06-27 17:53:00 UTC
With and without embedded valve head:
Colonel_Klinck
2015-06-27 19:07:00 UTC
Holy shit m8. That has to hurt.
No. 47
2015-06-27 19:56:00 UTC
Aye, piston twisted and seized in bore and can't remove barrel - will have to cut piston out.
bruders8146
2015-06-27 20:42:00 UTC
This is not good.
And I take it SDR engines are as rare as rocking horse poo!
And I take it SDR engines are as rare as rocking horse poo!
Reb
2015-06-27 20:52:00 UTC
Someone has put some bad juju on that bike. Fix that motor and sell that sucker.
bruders8146
2015-06-27 21:08:00 UTC
I find it odd that it's happened again so soon.
Could this not be down to bad fuelling and the engine running too lean?
Could this not be down to bad fuelling and the engine running too lean?
omky756
2015-06-27 22:32:00 UTC
Post missing.
No. 47
2015-06-27 23:59:00 UTC
Post missing.
No. 47
2015-06-28 00:04:00 UTC
Post missing.
ktmguy
2015-06-28 01:13:00 UTC
A bot of an horror story there.
Maybe an excuse to do the whole thing up properly with new bits and it'll be fine for another 50 thousand miles!
Maybe an excuse to do the whole thing up properly with new bits and it'll be fine for another 50 thousand miles!
bruders8146
2015-06-28 04:21:00 UTC
Post missing.
No. 47
2015-06-28 11:11:00 UTC
Not sure of logic of that - rear cylinder drops valve, replace with good used head, barrel and rod but new valves, springs, rings, etc - front cylinder then also drops valve, why not do same?
No. 47
2015-07-19 18:10:00 UTC
bruders8146
2015-07-19 21:11:00 UTC
Whoop Whoop let the fun commence
No. 47
2016-10-14 17:10:00 UTC
Ho hum - viewtopic.php?f=8&t=26908
No. 47
2020-06-06 18:13:00 UTC
This may be the problem...........................
Front lhs inlet valve this time
Front lhs inlet valve this time
RichUK
2020-06-06 18:55:00 UTC
picture not showing here..
Willh
2020-06-06 23:09:00 UTC
Ditto
No. 47
2020-06-07 09:08:00 UTC
Edited
RichUK
2020-06-07 10:11:00 UTC
Nope, your link requires you to sign into a google account before viewing..., but then denies you access anyway... so is a waste of time.
I've started using flickr to host photos now as it just works without requiring the viewers to jump through hoops.
I've started using flickr to host photos now as it just works without requiring the viewers to jump through hoops.
No. 47
2020-06-07 11:04:00 UTC
Ffs.....................edited again.
brudenell8146
2020-06-07 14:13:00 UTC
yeah picture link works for me now.
has that dropped a valve and smashed the guide?
upgrade to some bronze type guides may help keep it cool. but then again I'm not sure on policy on titanium valves. sure the titanium itself acts as a heat distributor.
please keep us/Me posted? interested in the cause or possible repair
has that dropped a valve and smashed the guide?
upgrade to some bronze type guides may help keep it cool. but then again I'm not sure on policy on titanium valves. sure the titanium itself acts as a heat distributor.
please keep us/Me posted? interested in the cause or possible repair
No. 47
2020-06-07 17:17:00 UTC
Not sure yet whether valve dropped or collett broke up first but valve stem is now s-shaped and head destroyed at collett seat.