Kawasaki Vulcan

[lorddanu]

voi aveti o problema cu consumul

mie, in cele mai nefericite cazuri mi-a luat sase jumate la suta

 

in rest intre 4,5 - 6 la suta de km

 

PS: dupa golirea tobelor s-a observat o reducere vizibila a consumului intre 0,25 - 0,75 l la suta de km

[mas oyama]

oare cine va fi urmatorul proprietar?

http://www.pro-bike.ro/forums/Kawasaki-Vn-...sic-t36640.html

 

maica da grozavai!

guma prea lata, not my taste!

bLack-ule; ce fainai si ce bine da saua !

[foxdesert]

nice ddanu. se pare ca nu sunt singurul. la mine de cand am dragpipes-urile m-am trezit cu consum inafara intre 4,1-4,5. si nu prea sunt adeptul vitezi de croaziera. mi-a cazut fatza de vreme ce in orash ajunge la 6 juma.

 

voi aveti o problema cu consumul

mie, in cele mai nefericite cazuri mi-a luat sase jumate la suta

 

in rest intre 4,5 - 6 la suta de km

 

PS: dupa golirea tobelor s-a observat o reducere vizibila a consumului intre 0,25 - 0,75 l la suta de km

[Vantul]

Marit avansul? Cum? Ia detaliaza mata aici, ca suna interesant...

 

 

salut.

nu stiu daca am zis bine avansul... ralantiul, sau idle speed-ul. sub capacul filtrului de aer, usor orientat catre partea din fata a motorului, foarte aproape de cilindrul fata, e un mic robinet negru. cam flencane el in toate partile. dupa ce am incalzit bine motorul, am impins usor robinetul inauntru si am rotit putin spre dreapta (mea). adica spre cilindru. am simtit ca a crescut usor turatia motorului, am tras inapoi in jos robinetul, in ceea ce imi aminteam eu ca era pozitia initiala, fara sa-l mai rotesc insa. n-am ureche de artist sa stiu la ce turatie l-am reglat, dar, cum spuneam, n-a mai dat rateuri. nu am mai fost nevoit nici sa merg cu socul tras...inainte, era destul de ciudat fara soc, dadea rateuri pe curbe si pierdeam din putere de aveam impresia ca acum musc din asfalt. alteori murea motorul cand vroiam sa plec de pe loc de la semafor mai in forta.

 

am mers duminica 20 si ceva de km cu reglajul asta. maine o sa merg mult mai mult si o sa ma conving daca a fost sau nu o intamplare ca a functionat. o sa-ti spun cum a fost. daca nu ma fac cub de gheata si, in cazul asta, mai vorbim la primavara, cand imi vor iesi ghioceii de sub mustati.

 

 

[Blackrider]

salut.

nu stiu daca am zis bine avansul... ralantiul, sau idle speed-ul. sub capacul filtrului de aer, usor orientat catre partea din fata a motorului, foarte aproape de cilindrul fata, e un mic robinet negru. cam flencane el in toate partile. dupa ce am incalzit bine motorul, am impins usor robinetul inauntru si am rotit putin spre dreapta (mea). adica spre cilindru. am simtit ca a crescut usor turatia motorului, am tras inapoi in jos robinetul, in ceea ce imi aminteam eu ca era pozitia initiala, fara sa-l mai rotesc insa. n-am ureche de artist sa stiu la ce turatie l-am reglat, dar, cum spuneam, n-a mai dat rateuri. nu am mai fost nevoit nici sa merg cu socul tras...inainte, era destul de ciudat fara soc, dadea rateuri pe curbe si pierdeam din putere de aveam impresia ca acum musc din asfalt. alteori murea motorul cand vroiam sa plec de pe loc de la semafor mai in forta.

 

am mers duminica 20 si ceva de km cu reglajul asta. maine o sa merg mult mai mult si o sa ma conving daca a fost sau nu o intamplare ca a functionat. o sa-ti spun cum a fost. daca nu ma fac cub de gheata si, in cazul asta, mai vorbim la primavara, cand imi vor iesi ghioceii de sub mustati.

 

da,e vorba de relanti...adicatalea ai crescut putin turatia motorului....(adica acum pornesti cu gazul putin tras).

[sorinavram]

Ala e ralenti-ul, turatia normala trebuie sa fie undeva pe la 1000 (plus/minus 50 rpm), dar nu prea ai cum s-o masori, doar la un service. Aceleasi simptome am si eu, da rateuri la turatii mici, dar nu si la ralenti, ci imediat cum pisti putin acceleratia. E din proportia gresita de aer/benzina, are prea mult aer (amestec sarac). Daca mergi cu ralentiul mai ridicat, iti creste consumul.

[cria_p]

Ala e ralenti-ul, turatia normala trebuie sa fie undeva pe la 1000 (plus/minus 50 rpm), dar nu prea ai cum s-o masori, doar la un service. Aceleasi simptome am si eu, da rateuri la turatii mici, dar nu si la ralenti, ci imediat cum pisti putin acceleratia. E din proportia gresita de aer/benzina, are prea mult aer (amestec sarac). Daca mergi cu ralentiul mai ridicat, iti creste consumul.

 

 

* carburatoarele...?

si la mine are aceleasi simptome (Intruderul, ..dar sper sa ma lasa adminul sa postez aici, ca sunt ON! bre..., nu OFF ).

daca nu-s membranele bune, da rateuri la plecare de pe loc, pana se incalzeste. Asta am constatat io la a mea. plus ca-i creste consumu simtitor. asa ca: verificati-va membranele alea

[Vantul]

Ala e ralenti-ul, turatia normala trebuie sa fie undeva pe la 1000 (plus/minus 50 rpm), dar nu prea ai cum s-o masori, doar la un service. Aceleasi simptome am si eu, da rateuri la turatii mici, dar nu si la ralenti, ci imediat cum pisti putin acceleratia. E din proportia gresita de aer/benzina, are prea mult aer (amestec sarac). Daca mergi cu ralentiul mai ridicat, iti creste consumul.

 

 

da, da, asta a fost si diagnosticul de principiu al lui Yoshi de la Kaore cand i-am povestit despre simptome. amestecul nu e cel potrivit. avem aceeasi problema se pare. tot numai la turatii mici. dupa ce merg vreo 10 km nu mia face figuri. acum hai s-o reparam. am mers azi vreo 40 de km si am tras concluzia ca n-am remediat problema asa cum crezusem zilele trecute, ci doar am ameliorat putin nebunia vulcanului....... eu stiu care-i treaba cu relantiul, ce inseamna el si cum afecteaza consumul.

 

o bag in revizie in cateva saptamani si fac si carburatorul cu membranele lui cu tot....

 

[mas oyama]

Ala e ralenti-ul, turatia normala trebuie sa fie undeva pe la 1000 (plus/minus 50 rpm), dar nu prea ai cum s-o masori, doar la un service. Aceleasi simptome am si eu, da rateuri la turatii mici, dar nu si la ralenti, ci imediat cum pisti putin acceleratia. E din proportia gresita de aer/benzina, are prea mult aer (amestec sarac). Daca mergi cu ralentiul mai ridicat, iti creste consumul.

 

rateul se produce dupa decelerare, adica dupa ce lasi maneta acceleratiei si revine in relanti?

atunci se produc rateurile?

daca e cu un singur carb atunci nare cum sa fie din proportia de amestec gresita cum spui tu, ca e doar unul singur catburatrul si da la doi cilindri amestecul de aer si benzina!daca bine zic!

 

cria-p poate are drepate cu membrana, se poate!, problema insa cred ca pleaca de la aprindere, incearca avansul sa-l maresti sau sa-l micsorezi, schimba bujia...

[yknot]

kawa are un sistem de antipoluare care "injecteaza" aer proaspat in motor pt a mai diminua noxele, de obicei de aici vin problemele cu rateurile... la vn750 exista "reed valves" pe care multi le obtureaza scape de rateuri.

...sau poate e cu totul altceva

[dan_m3]

 

VN 750, VN 800, VN 900 !!!

unde este granitza, unde sint limitele??

 

Editat Noiembrie 13, 2007 de dan_m3

[Vantul]

Aceleasi simptome am si eu, da rateuri la turatii mici, dar nu si la ralenti, ci imediat cum pisti putin acceleratia. E din proportia gresita de aer/benzina, are prea mult aer (amestec sarac).

 

 

tocmai m-a lovit un gand... crezi ca are legatura cu gaurile pe care le-am dat in tobe? poate ca mica modificare in sistemul de evacuare avea nevoie si de un reglaj la carburator. sunt un neofit intr-ale mecanicii, dar ma dau si eu pe partiile ratiunii. ce parere ai?

 

destinatii fara rateuri.

[mihai_prd]

Granita este un topic mai sus, da e greu de citit.

[yknot]

poate sunt utile informatiile si se pot adapta si la altceva in afara de vn750

 

 

The sound (popping upon deceleration) is created in the exhaust pipes because of Kawi's EPA emissions design. Kawi designed the system to add cooler fresh/filtered air into the exhaust in order to create a second burning of wasted or unused mixture that may not have completely combusted during the times of closed throttle/decels. The poppings you hear are the secondary combustions in the exhaust sounding out

 

Couple things. First, everyone else is right about the air mix screws. Turn them all the way in (Clockwise, using that very small screwdriver) and then turn them out about 2 turns. If you experience popping, turn them out another 1/4 turn. If that doesn't work, try another 1/4 turn. Keep doing that, but don't go more than 3 1/2 turns total.

 

Second, when you replaced your pipes, did you use new crush gaskets where the pipes attach to the cylinders? This is a common place for air leaks which will cause popping. Somebody posted the Harley Davidson gasket part number a few days ago that will work on the VN750. Or you can get a pair from JUDGE on the VROC board for $6.00. Also, those acorn nuts tend to work loose a little after changing pipes - check to make sure that they are snug, but DO NOT overtighten - I think they are only supposed to be 12 or 14 ft-lbs. or something like that.

 

Third, you might want to consider coasters or marbling to cut off the air to those reed valves if you haven't already done so. Some combination of these things should eliminate the popping, or at least greatly reduce it. Good luck, and keep us posted on your progress

 

 

end of part 1

 

--- Mesaj completat în 14 Nov 2007 07:42 -------------
part 2

 

Symptom: 'Popping' upon deceleration- common with Vulcan's. -

 

Reason: Emission control.

 

In addition to tuning the bike lean from the factory to reduce emissions, Kawasaki also induces 'fresh air' (as Kawasaki calls it), or oxygen, into each cylinder during the exhaust cycle. It's the manufacture's good intentioned design efforts to comply with EPA Air Quality Control emission standards to promote cleaner combustion resulting in reduced air pollution. So if you care more about the environment than the your bike backfiring, stop here. -

 

Problem: It has long been established by riders of Vulcan's that this system is flawed. While introducing fresh air into the exhaust port does reduce unwanted emissions, it has a negative impact on performance. All engines have a small amount of unburnt fuel that makes it to the exhaust manifold. It cannot burn completely and then leaves the pipe without a making a peep- unless you provide oxygen. Now you have heat, fuel, and oxygen. Presto! It results in small explosions or backfiring/popping. This is more evident during deceleration, as more fuel gets momentarily 'loaded' into the exhaust pipe. Most would agree a well-tuned engine does not backfire. Aside from the sound, this can also cause your pipes to blue due to excessive heat, and your engine will run hotter. -

 

Fix: An air suction "reed valve" is attached to each cylinder head with a large hose attached. During each exhaust stroke, those valves allow fresh air to flow into each cylinder's exhaust port from the air filtered surge tank (large plastic plenum under the gas tank). These reed valves also block air from moving back into the surge tank. There is also a second valve in this system... an air-actuated valve located near the back of the gas tank (take off the seat first). It's several inches in size and has three large ½" hoses and one small hose connected to it. The small hose is connected to the vacuum port on the right side of the bike (rear cylinder carb). When the throttle is opened (accelerating of just cruising), there is no the vacuum and the air-actuated valve will remain open and allow air to flow from the surge tank into the large hoses going to the air suction reed valves on the cylinder heads. During coasting (hand off the throttle), there is a vacuum present, and the air-actuated valve is closed and will not allow air to flow into the reed valves.

 

The modification to fix this is easy and has great results. You will greatly reduce the popping, reduced pipe bluing, and your bike will run cooler.

 

method #1: (I like this option, you can always return it to stock which may be needed to pass emissions) - pull hoses off reed valves. On left side (rear cylinder) the reed valve is on the top of the cylinder about where your knee is. On the right side (front cylinder), it's under the back side of the air filter. Plug both hoses with a marble (they seem to be the perfect size), or a steel ball. Do not worry about the marble breaking, never heard of that happening. It probably has the added benefit that it does not heat up like a steel ball would. As an alternative, you can also plug the hoses on the other end, right before they enter the air-actuated valve under the seat at the back of the tank.

 

method #2: - replace reed valves on each cylinder head with a 'coaster'. This is a metal plate that replaces the valve and plugs the port (same as a marble would do). Some people prefer the look and even polish their coasters. You can then remove all the hoses and even the air-actuated valve if you prefer. Be sure to plug (the now unused) vacuum line that goes to the rear cylinder on the right side of the bike. Some say this method saves weight, but it's not much at all, probably less than a pound. You can buy coasters here http://home.flash.net/~sanco/coaster.html and Also see the Yahoo VN750 site: Files > FAQS > Drews Coaster Installation.htm

 

I suggest implementing this fix in any event- it will make the bike run better. However, if you still experience popping, it can be caused by air getting into the exhaust or too lean a mixture.

 

- Back your carburetor mixture screws to about 2 1/2 turns (they are factory set at 1 5/8 turns out- too lean!). I have gone as far as 3 1/2 turns to reduce the popping (just make sure the screw does not fall out). Do each cylinder separately, they do not have to be the same !

 

- Figure out which side is popping. Check for any leaks where that exhaust pipe meets the engine header. With little to no wind around, hold a cigarette several inches below where the pipe meets the engine. Rev to 3K RPM. If ANY smoke is sucked into the pipe or is disturbed in any way, loosen the acorn nuts and reseat the pipe (note: do not over-tighten the nuts, tighten them evenly, and use anti-seize compound) .If ANY amount of smoke still gets sucked into the pipe or is disturbed after reseating, replace the head gasket. It only takes a VERY small leak to cause popping. Now throw out the smokes. They are not good for you.

 

- Check for loose boots on the input and output of the carburetors. This will cause a lean condition which leads to popping. Idle the bike (to create the highest carburetor vacuum), then liberally spray each one with WD-40, waiting between sprays. If there is a leak, the engine will stumble as the WD-40 gets sucked in (this will not damage the bike). Please do not use a cigarette around the carburetors. There is fuel in them, we are trying to fix your bike, not blow it up.

 

- Check float-bowl levels per manual. This can cause a lean (or rich) mixture.

 

- The coasting enricher gasket may have a pin-hole in it, or the vent hole is plugged. It's the small round plate held in place by two phillips head screws, above the float bowls on each carburetor. Be careful when removing, it's spring loaded inside.

 

FYI - for clarification of terminology, what you are calling "coasters", are the reed valve assemblies. Coasters are a generic term for "something" used to replace the reed valves, to block-off the fresh air from the air filter surge tank. Other ways of blocking the air, are putting a 5/8" (.625") marble or ball bearing in the hoses coming off the reed valve covers. Reportedly a penny will also work, but a penny is .75" diameter (a dime is .705"), and 1/8" seems to be a lot to stretch the hose!! The "reed" is attached to the reed plate by 2 screws. Some have suggested flattening the reed stopper bracket with a hammer. If this is done, I would recommend removing the screws and the bracket, then straightening the bracket. Knifemaker also sells ($15 ?) plates made to either replace the reed valve assemblies, or with shorter bolts, replace both the reed valve assemblies and the reed valve covers.

 

 

Removal of Idle Mixture Screw Caps Webpage describes removal of caps/plugs of Idle Mixture Screws

 

In Jax's photos at (Click) there is a picture of the left carb air mix screw (photo 12&14 of 21) and right carb air mix screw (photo 13&15 0f 21) under "tech pics"

 

Turning out would be counter-clockwise (towards your left when looking at the air mix screw) You know, usually there are a few guys out here that have done the adjustment and know just how much.. and if you have turned these they may suggest going back to start and then turning them back to somewhere around 2 and a quarter turns or so.. Jax, Pick, JR, and a few others might be able to walk you through the finer details on this. *S*

 

also see HERE

 

Quote:

Don't think of them as AIR mixture screws since they adjust the fuel and not the air. Since they are FUEL mixture screws turning them in (CW) restricts the fuel and out (CCW) allows more fuel in. This fuel is used at idle only. If you aren't sure where to set them, screw them all the way in then back out 2 1/2- 3 full turns.

 

Number of turns out should be from the "bottom". Factory settings are supposedly around 1 1/2 to 1 5/8. Mine were 1 5/8 and 2 1/4. Now running 2 3/4. If you turn them out 2 1/2 from the factory settings, you are in serious risk of them falling out! <g> You will know if that happens, though. grambo

 

Quote:

I have to agree with Bruce. Anything past 3 is pushing it. 2 1/8 here on my screws

 

Check ALL your exhaust bolts and junctions. Even a small leak will degrade the system and cause popping. Check the carb boots to make sure they are on tight, etc

[sorinavram]

Rateurile noastre NU se produc la decelerare, ci la inceputul accelerarii - sa zicem pe la 1200-1500 RPM - si nu se produc in tobe, ca la VN 750 cu sistemul ala de post-combustie - ci in filtrul de aer.

 

@ vantul: nu cred sa aiba legarura cu gaurile, facea asa si inainte de a-i gauri toba. O alta opinie ar fi ca folosim bujii prea calde (CR7E), desi astea sunt recomandate in manual.

 

--- Mesaj completat în 14 Nov 2007 14:30 -------------

 

VN 750, VN 800, VN 900 !!!

unde este granitza, unde sint limitele??

 

Groso-modo ar fi asa:

VN 750: V-twin, 2 carburatoare, cardan, nu stiu puterea si cuplul.

VN 800: V-twin, 1 carburator, lant, putere 55 CP, cuplu max. 64 Nm

VN900: V-twin, injectie, curea, putere 55 CP, cuplu max. 82 Nm

 

Basca diferentele de design.

[yknot]

Rateurile noastre NU se produc la decelerare, ci la inceputul accelerarii

sa inteleg ca lumea pe aici are rateuri comune?

[Vantul]

Rateurile noastre NU se produc la decelerare, ci la inceputul accelerarii - sa zicem pe la 1200-1500 RPM - si nu se produc in tobe, ca la VN 750 cu sistemul ala de post-combustie - ci in filtrul de aer.

 

@ vantul: nu cred sa aiba legarura cu gaurile, facea asa si inainte de a-i gauri toba. O alta opinie ar fi ca folosim bujii prea calde (CR7E), desi astea sunt recomandate in manual.

 

 

fix asa, la ACCELERARE... si in filtru, nu in tobe. am zis de gauri pt ca al meu a inceput sa faca figuri dupa ce le-am dat. de bujii habar n-am, am recunoscut ca-s neofit. pai sa le dam cu niste gheata...

 

vreau sa ajung in urmatoarele doua saptamani la mecanic. reglez carburatorul, schimb bujiile si filtrul de aer.... plus altele fara relevanta in mica noastra discutie, si am sa va spun concluziile.

 

respect

 

 

 

--- Mesaj completat în 15 Nov 2007 17:59 -------------
got my wish....

 

 

manual pt VN 800 `96-`04

 

multumiri d-lui legionaru`!

[zoso]

Va salut! Am o intrebare, poate ma puteti ajuta. Acum vreo luna l-am rugat pe un prieten din Germania sa imi gaseasca un motor - de preferat VN800 sau (ca a dua optiune) un Suzuki VS800. Si neaparat sa nu fie clasic sau drifter. El a cautat mai pe la handleri, mai prin ziare si a gasit vreo 3. Doua le-a exclus din start, aveau >50000 km. Ultimul l-a gasit la un handler adus chiar in ziua aia si nu au apucat sa-l lustruiasca. Va atasez si poza facuta la repezeala cu mobilul. Acum, lasind la o parte ca e cam "incarcat", tot felul de table peste cilindrii, un snop de faruri (care in principiu se pot si demonta), handlerul ala zice ca are montat nustiuce dracu de catalizator (probabil teava aia de lateral) si din cauza aluia are mai putin cu aproximativ 10 CP. Intrebarea mea e urmatoarea: toata tevaria aia cu catalizator si alte prostii se poate demonta ca sa se aduca motorul la starea originala? Pentru ca arata urit si are si putere mai mica. Nu dau eu zece CP de la mine ca sa salvez balenele, ghetarii, ozonul si alte prostii. Mi se pare din poza ca s-a umblat si la suspensia spate.

 

L-am rugat sa mai imi faca niste poze si sa mai intrebe pe acolo, dar trebuie sa ma misc destul de repede, tot asa a ratat un VN800 la mustata si ala era boboc - e toamna si geambasii de motoare sint in actiune.

 

Ce parere aveti? Sa ma duc sa-l iau?

 

 

[mihai_prd]

Poza.

[zoso]

scuze, am incercat sa pun poza, dar mi-a trimis-o pe MMS si nu reusesc sa o copiez din telefon, de fapt nu reusesc sa-i fac nimic, nici sa o sterg macar . a zis ca se duce azi sa mai faca ceva poze, dar cu un aparat de oameni normali.

Editat Noiembrie 18, 2007 de zoso

[morpheus]

Poza.... ?

[zoso]

imi pare rau, a fost pe acolo si nu l-a mai vazut, oricum duminica era inchis si s-a uitat numai prin geam. posibil sa fie in atelier la aranjat. sau poate vindut. oricum mai are in vedere citiva vulcani de prin ziar, saptamina asta se duce sa-i vada cind isi face ceva timp (are de misunat vreo 100 km ca sa-i vada). in schimb la handlerul ala a vazut altceva - scuze de calitatea pozei dar e facuta prin geam si cu zoom, se vede cam rau. oricum asta nu-mi trebuie, e cam prea mare.

Editat Noiembrie 19, 2007 de zoso

[mihai_prd]

Si unde e vn de 800?

[sorinavram]

imi pare rau, a fost pe acolo si nu l-a mai vazut, oricum duminica era inchis si s-a uitat numai prin geam. posibil sa fie in atelier la aranjat. sau poate vindut. oricum mai are in vedere citiva vulcani de prin ziar, saptamina asta se duce sa-i vada cind isi face ceva timp (are de misunat vreo 100 km ca sa-i vada). in schimb la handlerul ala a vazut altceva - scuze de calitatea pozei dar e facuta prin geam si cu zoom, se vede cam rau. oricum asta nu-mi trebuie, e cam prea mare.

Mi se pare ca asta e un Kawa EN 500.

[Blackrider]

eu zic sa iei un VN800A,daca iti permite bugetul....

 

 

B.