kouadgio a écrit :salut a tous je fais paris de votre secte, g'un scorpion aussi.
la plus part du temp je roule sans la chicane mais ca fait 2 ou 3 foi que je lis que c'es dangereux pour les soupapes est ce vrai?
surtout a la deceleration.
dites moi quoi car avec sa chicane on entend plus si il y a une moto ou pas?
J'ai lu aussi que les "explosions" a la deceleration peuvent endomager les soupapes d'echappements...mais de la a expliquer pourquoi...
Avec le pot d'origine, j'avais l'impression que des explosions se produisaient quand meme mais que le bruit du pot est tellement feutré, insonorisé, fade, inexpressif, inexistant....bref a chier

que finalement le bruit des pets n'arrivaient pas jusqu'aux oreilles du SViste.
Donc a priori je ne fais pas trop de soucis. (mais bon je peux me tromper)
[edit]:
http://www.crazymoto.net/index.php?showtopic=236575
une explication du pétage dans le pot... :lol:
[Reedit]
apres avoir maté la revue technique, c'est en effet ce petit solenoide de mer** + "reed valve" (valves tubulaires?) qui balance de l'air dans l'echapement juste a la sortie des soupapes -> donc explosion. Dans le topic de crazy moto, le gars parle d'une bille pour rendre inoperant le solenoide. Ne serait pas plus simple de debrancher ce soleinoide?
sur ce je m'en vais voir le shema electrique.
[Rereedit]
Code : Tout sélectionner
The PAIR system is for pollution control. It consists of a solenoid valve which can allow air to be directed from the air box into the exhaust path. When the ECU (bike's computer brain) thinks there may be a good chance that some unburned fuel is being released into the exhaust pipe the valve opens and lets some air into there too. The ECU will use input form various sensors (engine rpm, throttle position, O2 sensor if present, etc) to decide when this might be happening. The hope is that the oxygen in this air will react with the unburned gas to form carbon dioxide and water thereby preventing the release of unburned hydrocarbons, hence reducing pollution.
One of the side effects of this system is that when you replace the restrictive stock exhaust and put on a free flowing aftermarket pipe you will hear backfiring as the air pulse from the pair system hits the unburned fuel in the pipe and detonates it. This will primarily occur when you roll off the throttle. Of course since this detonation is not occurring in the cylinder it does nothing for your bike performance except give it cleaner emissions.
If the backfiring sound bothers you, you can defeat the PAIR system and stop it form occurring. There are a couple different approaches here depending on what exactly you would like to accomplish. If you decide to defeat the system you may want to go the full nine yards and remove all the associated hardware like the solenoid valves and tubing, etc. This will allow you to shave off about 4 pounds of weight. Its a little complicated to do this and you will need to get metal plates that can be mounted to the cylinders to plug the holes formed when removing the various bits. Also some monkeying around with wiring is required so no warning lights come on and everything works properly. However this isn`t to hard to do and other members have done it. You can find out how with careful searches
http://www.sv1000.inuk.com/ click on FAQs
Some have done what is referred to as the poor man's PAIR Mod. Simply plugged the hole that the PAIR system gets its air from and that made the backfiring go away. Now you have 4 pounds of useless hardware stuck to your engine. The ECU still tells the valves when to open and close and they still open and close when told to. But nothing passes through the valves because you screwed a 3/8 in bolt into the air intake Others have plugged the hose that is connected to this intake with a ball bearing essentially accomplishing the same thing. It would be nice to get rid of the 4 pounds but if you want to be able to easily return the system to stock for service, or inspections etc.
Source:
http://www.tlplanet.com/forums/archive/ ... 32752.html
En gros, tu bouches l'entrée d'air du solenoide avec un boulon et c'est reglé.
A+