128 replies to this topic

[wicklamulla]

i dunno Rory i'm just stabbing in the dark too be a liar with you !

[Ruairi]

i dunno Rory i'm just stabbing in the dark too be a liar with you !

Well I guess we're both liar's then according to Yoda (JBX!!)

[mechinha]

Well I guess we're both liar's then according to Yoda (JBX!!)

i do believe that you need to be togheter and have a few beers... concerning my problem still no news. JBX that sugestion of yours "the o-ring beneath the cap" is ok the o-ring is fine. but i feel that you have tons of reason.. it is a carb. problem. how can i make a perfect tune?
thanks mate.

[JBX]

Well I guess we're both liar's then according to Yoda (JBX!!)

Liar's penitence shall be no beer during... let's say 1 hour, ok ?

[JBX]

i do believe that you need to be togheter and have a few beers... concerning my problem still no news. JBX that sugestion of yours "the o-ring beneath the cap" is ok the o-ring is fine. but i feel that you have tons of reason.. it is a carb. problem. how can i make a perfect tune?
thanks mate.

I'm not very good at carbs, these are very sophisticated devices that involve many parts (twice more than FI systems) and require sharp tuning (no ECU-tunning available). Some people say it's crap compared to fuel injection.

That said, like any other mech systems :
- all rubber parts will wear, crack or rip & need special attention or replacement.
- metal moving parts wear too and need replacement : needle & emulsion tube, fuel intake closing...

Known 3VD's weaknesses are carbs & valves (especially with adaptative exhausts).
Got both of them with my old XTZ, I sold it before getting mad.
Ignition problems are not common, except when rubber parts get old (oil, grease, UV light & ozone attack rubber parts).

[mechinha]

Known 3VD's weaknesses are carbs & valves (especially with adaptative exhausts).

so if i did understand your answer you mean that one of my problems could come from the exhaust that is in my tdm ( it's a HArpoon modified). ?http://i269.photobucket.com/albums/jj63/mechinha/tdmmecha.jpg

[JBX]

Known 3VD's weaknesses are carbs & valves (especially with adaptative exhausts).
so if i did understand your answer you mean that one of my problems could come from the exhaust that is in my tdm ( it's a HArpoon modified). ?http://i269.photobucket.com/albums/jj63/mechinha/tdmmecha.jpg

That's not specific to TDM, all four strokes engines are sensitive to exhaust modifications.
When you put different mufflers, the risk is that the exhaust gas speed is higher.
It leans the mixture and gives exhaust gaz a higher temperature.
Exhaust valves do not like very much very high temperatures...

Engine specialists will correct me if I'm wrong...

[Pict]

But in closed control systems like the 900, which have lambda sensors, won't these compensate the fuelling? Or are they just to ensure that emissions don't rise above a certain level and won't "care" about leaning of the mixture?

[mechinha]

hi felows..still the same old sh#$%t i've just inserted a knew spark and after a few days runing good today when i started the damn thing-"kabem" there went another FUC$#"%NG € 19.00 spark. here it is the bastard: <a href="http://s269.photobuc...rent=spark.jpg" target="_blank"><img src="http://i269.photobuc...inha/spark.jpg" border="0" alt="Photobucket"></a>
i'm so tired of this...does any kind soul have just one more solution?? emlsion tubes= new; needles=new carb tuning acording to owners manual, iridium spark, coils isolated, o-ring under the cap inside the carbs ok..well i'm completely tired and pissed off with tis shitt.

i believe that i'm going to give up. sorry

[mechinha]

hi dudes..I'm back but still no news. more knowledge because i've reading and searching a lot and this forum has been a outstanding source of information..if you kindly have more info i would appreciate it. i have wrote to a fellow (Dan is the name)
in the us i found it in here (http://www.dansmc.co...epaircourse.htm) but until so far no reply.

i'll be back

[stormy]

yeah (gulp) sorry i forgot that part the spark gets black and smell the hell out of gas included in the exhaust systems. the bike has got 20.530 km and until so far she seems like silk now it's like a catcus - always hurting me.
God be pity on me...oh by the way coils have been measured and tested and it apears to be ok the 3 guys they' ve all agreed that the problems coould come from the carburetor or the needles but i' really don't know...my fellow eupi does not yet told him my troubles. ah celticbiker someone told once that "in madness lies the key for reason and true" so i believe that i'm in the right place eheheheh

Mechinha,

Have you looked at your fuel pump at all?

I freely admit that I haven't trawled through 7 pages of this thread in detail, but if I understand it correctly, you get fouled (dirty) plugs fairly quickly, you have done the emulsion tubes but they weren't really that bad (judging by the pictures), you have checked and eliminated the ignition side of everything and stuck some tape every where.

OK, if that is the correct gist of what I've read, then look at the fuel pump. I had exactly the same symptoms after I rebuilt mine last year, and it was a holed diaphragm in the fuel pump, allowing too much fuel through. Worse was when the bike was parked up, fuel would run down and into the cylinder and fill up the exhaust.


Have a look here:--

http://www.carpe-tdm...o...882&hl=fuel


It maybe not at all related to your woes, but you have tried everything else ....... what have you got to lose?


Mike

[robgosty]

Hi bud, if it is always the same plug that fouls might be worth having a compression test done, could be worn rings/piston on one cylinder causing plug fouling, if not too serious try running a plug one grade hotter, helps to burn off excess oil, only a temp fix tho, if compression is down needs a proper dose of looking at

Edited by robgosty, 25 February 2008 - 09:31 pm.

[mechinha]

robgosty and stormy. thank you guys for your great help. at this present time the guy that sold me the bike has take it to try to guess what is wrong. i will give him after i translate you wisdom words the sugentions that you gave me.
he has two chances: the bike returns brand new or he will give me for free a 95 africatwin. the third option it is not to be consider. it will probably be the cause of a great pain (for him). i hope that i never consider that 3 option.

i'll give more notices.

thanks.

by the way i have search a lot of information in the net and i've spotted several sites that speak of carpe-tdm but one of them i found particulary fun: www.advrider.com in the sections beasts we can find our tdm. to review.

[mechinha]

Hi dudes... the boring one is back again...well untill so far two moths after the last tune, no more fouled spark, no more madness problems etc. I still don't know what they' ve done to the bike but it still working ( 800 km). I've boughted a original tdm exhaust and untill so far it's ok, but this mornig and after 10 min on city trafic something weird hapened - one of the silencers released a litle bit of white smoke and i've noticed a gasoline smell. can it be related to something?
thanks for your wisdom..

Edited by mechinha, 28 May 2008 - 09:58 am.

[Studley Ramrod]

Hi dudes... the boring one is back again...well untill so far two moths after the last tune, no more fouled spark, no more madness problems etc. I still don't know what they' ve done to the bike but it still working ( 800 km). I've boughted a original tdm exhaust and untill so far it's ok, but this mornig and after 10 min on city trafic something weird hapened - one of the silencers released a litle bit of white smoke and i've noticed a gasoline smell. can it be related to something?thanks for your wisdom..

Hi bud, if it is always the same plug that fouls might be worth having a compression test done, could be worn rings/piston on one cylinder causing plug fouling, if not too serious try running a plug one grade hotter, helps to burn off excess oil, only a temp fix tho, if compression is down needs a proper dose of looking at

Like the man said, you may need to get the compression tested as you might need the valves adjusting or there could be wear. If you've changed the type of engine oil it could be a cause. May need the carbs balancing.

Edited by Studley Ramrod, 28 May 2008 - 12:16 pm.

[wicklamulla]

is the air filter clean ?

[mechinha]

is the air filter clean ?

Hi i believe so, but she omly did that once. yesterday and today i've ride a litle bit more then usual and untill now it's allright.
let me hope that she is normalized again.
thanks to you guys..for your sugentions.

i'll keep on touch.

[Nick Apostolakis]

Hello there, reading through all the pages of the thread, i would suggest you find a more competent engineer. The guys at carpe are awesome both in knowledge and will to help, but there is a limit to the help you can get from the internet. Some times you have to see with your own eyes and hear with your own ears the problem.

It seems to me that if your engineer was a little more experienced he would have saved you a lot of trouble and stress.

Hope your bike is without problems now.

Edited by Nick Apostolakis, 17 August 2008 - 02:38 pm.

[JMT]

dont suppose you also have what looks like a petrol leak strain on the engine just below the fuel tap?
Aye
either that or incorrectly set needle thingys

Tony,

What's the cause of the petrol leak stain thing?

[TonyDevil]

Tony, What's the cause of the petrol leak stain thing?

causes in order of likeliness

1) leaky petrol tap
to fix it take the tap off, and remove the 2 screws, pop down to your local plumbing supplies shop and replace the o-ring, assembly is the reverse of disassembly
2) perished fuel lines
replace the lot, cost is less that a tenner, 1meter/3.3feet should be enough, 2lines from tank to tap, 1 from tap to pump and 1 from pump to carbs
3) carb float bowl gaskets leaking
if you've had your carbs apart chances are these havent sealed or need replacing

worst case.....
4) petrol tank ....rusty/cracked etc