Seattle S'wing

Just joined the forum. Have 2004 Silverwing, silver in color, new Avon Strykers and Leo Vince pipe. Plan to install K&N air filter soon, because the pipe has caused minor backfires upon deceleration. Also, plan to install a J Costa Variator soon as well.

Like the bike a lot, have 11,500 miles on it and ride it daily to work. Only complaints are soggy front shocks, uncomfortable stock seat, and windscreen is too short.

grogers,

Welcome to the site and hope you enjoy it. Post some pics of your bike and rides you do. You can create your own folder in the Album section. As for the front shocks there are quite a few of us that have had the "Hyperpro" progressive front springs installed, which really do a great job. Also, you might want to look into the Givi or the Clearview screen if the stock is too short. I think everyone needs to replace the stock screens on bikes though. I have had 3 scooters and have had to replace all the windshields.

If you have any questions please just ask away. There are plenty of members that have a lot of knowledge here. Welcome.

Welcome. I've had both Clearview, CeeBailey and Givi windshields. I like the Clearview better, because of the vent.

Hi grogers,

Welcome aboard. This is a great forum and the members here are almost like family to me.

The back-fire at deceleration is caused by the lack of back pressure in the new exhaust system. In the stock muffler back pressure causes sound to travel back down into head and vibrates the exhaust valves just a little. This causes the valves to close faster. With your new exhaust system back pressure is all but eliminated and the exhaust valves have a slight hesitation in closing. This is common in free flowing, high performance exhaust systems.

DennisB

Welcome and enjoy

A change of the exhaust system without remapping the fuel injection can cause an excess of fuel mixture to build up in the exhaust when the throttle is closed. A more freely breathing exhaust will allow more mixture to be pumped in per rev and if the EFI doesn't know it may allow too much fuel to pass with a closed throttle and high vacuum condition. This can cause a bit of missing which wouldn't be noticed during deceleration and a bit of mixture can be ignited when the cylnder does fire. Carbureted bikes usually have either an enrichening jet that opens during high vacuum closed throttle operation, or may have cut off valves that cut off the fuel to the jets in those conditions and others have by pass valves that route air past the carbs into the exhaust to thin out the mixture below the detonation point at that time. If you change the exhaust you might need to change the EFI mapping to reduce popping back. It probably won't do any damage unless it's violent and if it's not annoying it's probably not worth remapping the chip.

grogers,

Welcome to the site.