Ok, Moving onto another issue that has been bugging me with my 1993 Yamaha TDM 850. Under quick acceleration or heavy load (only when accelerating) the bike seems to "skip" out of gear or misfires or the carb coughs... I cant really tell which one. I am not sure how else to describe it or figure out which one it is...
I may be able to take a helmet cam video of it happening... Would that help?
I dont know what else to describe. Just replaced battery, spark plugs, wires, and spark plug boots. Chain is about a year old, just got it replaced as well as the sprockets and it is at the correct tension.
Tdm Skips Under Load
Started by
alexk243
, Mar 28 2012 04:02 am
258 replies to this topic
#1
alexk243
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Posted 28 March 2012 - 04:02 am
#2
Pict
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Keep on keepin' on
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Posted 28 March 2012 - 06:01 am
Sounds like a main jet issue? I guess the engine falters even with the bike at rest? The carburation (emulsion tube etc.) team should be along soon...
"It's a TDM, Jim, but not as we know it"
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Diamond black TDM 900A TRIKE, 2006 ABS model converted by Trike Design (Caerphilly, South Wales) prior to first registration in March 2007.
#3
NZTDMGUY
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Posted 28 March 2012 - 06:48 am
Also possibly HT leads to the plugs.
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#4
Studley Ramrod
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Posted 28 March 2012 - 07:13 am
Does it happen in any gear ?
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#5
dapleb
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Posted 28 March 2012 - 07:21 am
If t'were the gears you would notice...becuase you would have to stick em bacon before it would go anywhere. If you don't have to put it back in to gear.....which is normally noticed by the Grrr grrr grrrrr grrrrrr CLANK/Lurch routine then it didnt jump oot of gear. Could be clutch sleeping if you didn't ewes hutt humm.... JASOO MA JAsssssooOOOooOOooOoOoOOoo MaaaaAaaaaaAAAAAAaaaaaAAAAAA JASSSOooo0o----ooo000o0o0oo0O)O)O)O MA...or could just be really old stinky oil. Start with the easiest things to check first and go from there. Lettuce snow.
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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.
#6
alexk243
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Posted 30 March 2012 - 03:56 pm
It does seem to happen in every gear, but not when its resting and if you accelerate easily it does not do it. Only under heavy load. The only thing it does at rest is backfire/caughs, and that is only at idle. This really only happens when driving and with a load. Which makes me think its something in the driveline as no matter how much you rev it at rest, it will not do it.
I like the idea of the clutch going out or slipping. That makes sense. How would I be able to check this or repair this?
The HT Lead/boots/plugs were just replaced as I thought that may have been an issue (it did it before the change as well) and the battery cause that was going bad as well.
I do not have to stick it back into gear so that must not be it. There is no way it can slip while in gear?
I like the idea of the clutch going out or slipping. That makes sense. How would I be able to check this or repair this?
The HT Lead/boots/plugs were just replaced as I thought that may have been an issue (it did it before the change as well) and the battery cause that was going bad as well.
I do not have to stick it back into gear so that must not be it. There is no way it can slip while in gear?
#7
Studley Ramrod
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Posted 30 March 2012 - 04:05 pm
Might be worth checking the front sprocket to make sure it's not slipping on the splines. Best thing is to grab hold and rock it back and forth. You can also check the sprocket teeth for any premature wear and double check the chain tension.
I've seen one where the sprocket nut was put on the wrong way round so it didn't secure the sprocket & washer properly.
Mk2a 2000 in Silver. Top end Refurb @ 41100 miles, Scottoiler, Renthal Road High Bars, Up & Back Bar Risers, Bellypan, DL650 Handguards, Capt. Picard Bar Ends, House of Henty SS Wheel spacers, New Seat Cover Fitted. 58 MPG !! Now owned by chrisbee ! Studley's mk2a Bloggerydoodaah ! Photos of my first MK1 Photos of my MK2a TPLQHCSRSFC No. 1 Fan
#8
dandywarhol
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Posted 30 March 2012 - 05:03 pm
Checking for clutch slip..................................
Put into 4th or 5th gear/apply brakes hard and/or jam front wheel against a wall or kerb/plenty throttle and dump the clutch - if the motor stalls immediately then the clutch is ok - if it keeps revving then the clutch has had it.
Put into 4th or 5th gear/apply brakes hard and/or jam front wheel against a wall or kerb/plenty throttle and dump the clutch - if the motor stalls immediately then the clutch is ok - if it keeps revving then the clutch has had it.
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#9
Bobos
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Posted 30 March 2012 - 05:34 pm
QUOTE(dandywarhol @ Fri 30th Mar 2012, 06:03 PM) <{POST_SNAPBACK}>
Checking for clutch slip..................................
Put into 4th or 5th gear/apply brakes hard and/or jam front wheel against a wall or kerb/plenty throttle and dump the clutch - if the motor stalls immediately then the clutch is ok - if it keeps revving then the clutch has had it.
Put into 4th or 5th gear/apply brakes hard and/or jam front wheel against a wall or kerb/plenty throttle and dump the clutch - if the motor stalls immediately then the clutch is ok - if it keeps revving then the clutch has had it.
...if the wall falls down the
We're all going to die, so let's be nice.
#10
mh1848
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Posted 30 March 2012 - 10:37 pm
QUOTE(Bobos @ Fri 30th Mar 2012, 06:34 PM) <{POST_SNAPBACK}>
...if the wall falls down the motor mortars had it.
alternatively - find a bit of road with a moderate incline - get it into 5th gear and let it try and pull like a tractor - if the revs spped up but the bike doesn't then clutch slip
a lot less stress on all components than dumping the clutch against a wall
TDM 1991 - two into one micron mated with a A16 Road and Race Supplies Stainless short can - Conti Road Attacks - Kagazume Wavy Rear Disc - Bagster tank cover - homemade sheepskin seat cover on top of custom seat cover - NonFango topbox on homemade mount - custom fusebox - very loud airhorn and cyclone alarm
#11
AzzA
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Posted 31 March 2012 - 01:16 am
Dappers,
You're accent is getting thicker/worse.
I tried putting your post through googles translater, and the output was something about cabbages and cider... nothing about bikes or engines whatsoever.
You're accent is getting thicker/worse.
I tried putting your post through googles translater, and the output was something about cabbages and cider... nothing about bikes or engines whatsoever.
#12
Studley Ramrod
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Posted 31 March 2012 - 09:02 am
That'll be the hispanic influence
Think he's learning Desperanto !
Mk2a 2000 in Silver. Top end Refurb @ 41100 miles, Scottoiler, Renthal Road High Bars, Up & Back Bar Risers, Bellypan, DL650 Handguards, Capt. Picard Bar Ends, House of Henty SS Wheel spacers, New Seat Cover Fitted. 58 MPG !! Now owned by chrisbee ! Studley's mk2a Bloggerydoodaah ! Photos of my first MK1 Photos of my MK2a TPLQHCSRSFC No. 1 Fan
#13
TKH
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full o shoite
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Posted 31 March 2012 - 10:42 am
Have you been using car engine oil or bike engine oil? Could it be the clutch slipping due to the what d'ya ma callits in car engine oil making it slip?
Alternatively something HT electrical if it's breaking down under load, does it ALWAYS happen or only when it's damp/wet?
Bit of muck/blockage in a fuel line?
Alternatively something HT electrical if it's breaking down under load, does it ALWAYS happen or only when it's damp/wet?
Bit of muck/blockage in a fuel line?
Edited by TKH, 31 March 2012 - 10:42 am.
#14
Pict
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Keep on keepin' on
- Location:North Herts., UK
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Posted 31 March 2012 - 07:31 pm
QUOTE(Studley Ramrod @ Sat 31st Mar 2012, 10:02 AM) <{POST_SNAPBACK}>
That'll be the hispanic influence Think he's learning Desperanto !
Think he's learning Desperanto !It's just "brocken" English - he's getting sett in his ways.
"It's a TDM, Jim, but not as we know it"
www.youtube.com/watch?v=RAHmEWim3to
Diamond black TDM 900A TRIKE, 2006 ABS model converted by Trike Design (Caerphilly, South Wales) prior to first registration in March 2007.
#15
alexk243
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Posted 01 May 2012 - 11:51 pm
Front Sprocket is fine. checked that out the other day. Have not checked the clutch yet (will go do that now).
I used Mobile 1 synthetic (10w40) in it... figured that would be fine. It has always had synthetic in it. About to do an oil change though.
I used Mobile 1 synthetic (10w40) in it... figured that would be fine. It has always had synthetic in it. About to do an oil change though.
#16
alexk243
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Posted 02 May 2012 - 12:03 am
Clutch is fine. Wall held up as well. Bike stalled when clutch was released in 5th gear against wall.
#17
Pict
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Keep on keepin' on
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Posted 02 May 2012 - 05:12 am
Nothing to do with ffeedback off final drive? Back tyre type? Wear, slick spot? Worn sprocket? Stiff link? Sorry if repeating.
"It's a TDM, Jim, but not as we know it"
www.youtube.com/watch?v=RAHmEWim3to
Diamond black TDM 900A TRIKE, 2006 ABS model converted by Trike Design (Caerphilly, South Wales) prior to first registration in March 2007.
#18
TYREDNGRUMPEE
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Posted 02 May 2012 - 10:49 am
QUOTE(alexk243 @ Wed 28th Mar 2012, 05:02 AM) <{POST_SNAPBACK}>
Under quick acceleration or heavy load (only when accelerating) the bike seems to "skip" out of gear or
Do you mean "jump out of gear"?
#19
Studley Ramrod
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Posted 02 May 2012 - 11:57 am
Sorry to harp on about the front sprocket but did you actually remove the nut and inspect the sprocket/shaft splines ?
Also, are you sure the drivechain isn't too slack ? Maybe try reducing the slack a tad ?
Mk2a 2000 in Silver. Top end Refurb @ 41100 miles, Scottoiler, Renthal Road High Bars, Up & Back Bar Risers, Bellypan, DL650 Handguards, Capt. Picard Bar Ends, House of Henty SS Wheel spacers, New Seat Cover Fitted. 58 MPG !! Now owned by chrisbee ! Studley's mk2a Bloggerydoodaah ! Photos of my first MK1 Photos of my MK2a TPLQHCSRSFC No. 1 Fan
#20
TYREDNGRUMPEE
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has been here 4ever
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Posted 02 May 2012 - 01:03 pm
Under quick acceleration or heavy load (only when accelerating) the bike seems to "skip" out of gear
What happens immediately afterwards? Down a gear? False neutral? Neither (still in gear).
Do you have to put it back in gear, up or down? Can you reproduce this at will on the throttle?
Worse in any particular gear compared to others?
What happens immediately afterwards? Down a gear? False neutral? Neither (still in gear).
Do you have to put it back in gear, up or down? Can you reproduce this at will on the throttle?
Worse in any particular gear compared to others?
Edited by TYREDNGRUMPEE, 02 May 2012 - 01:08 pm.
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