Found problem to fuel system on 2007 suzuki C90 Boulavard;-Wire contact to pump broken off. seemed to be tightened to tightly at mnfg. assemble .shows only slight contact area as if tightened to much. Don't like to make accusations, but this is the first time ,since I purchased it new that it has been apart,-To my knowledge.anyway, if anyone else is having this sort of problem ,you might want to check the connections on the (in tank) pump. thanks to everyone who posted suggestions. mblly

SOURCE: 1986 Suzuki Savage loosing acceleration

I have been having a simular problem with my girlfriends bike.She complained about the bike looseing power or "bucking " as she calls it , at speed.Several "shops" have played around with it ,but none have solved the problem .She feels the bike is not worth spending any more money on ,so I have tackled it .
The first thing I found was that someone had put the wrong hose on the pet ****. To open the pet **** you need vaccum from the cylinder side of the carb. There are two other hose nipples on the filter side of the carb that I don't know where they go .If you know , please tell me .The vaccum helped but didn't solve the problem.So I took the carb apart , cleaned out all the jets . One was pluged.
Now I have to run the bike a little,then check the spark plug. I think I am getting close.

SOURCE: Suzuki C90 Won't Start

Check your battery cables, especially the ground cable. Check your ignition switch for loose wires/connections. Check your fuse box. Check your wiring harness for shorts and broken wires. When you say "battery seems to have plenty of power" what does that mean? What test(s) did you perform on it?

SOURCE: We have a 2007 c90 suzuki. It has a charging

VOLTAGE REGULATOR MAY HAVE A SHORT IN THE HOTWIRE FROM THE RECTIFIRER TO THE BATTERY HOPE THIS HELPS

SOURCE: SUZUKI GSX1300RX(11/1999 MODEL) CODE 41( FUEL PUMP/ RELAY) NO GO

the fuel pump relay is ecm controlled, (ecm turns it on when key on, starter depressed, and when engine is running) if its turning on with a jumper wire, u may need to replace the ecm.

SOURCE: 2007 Suzuki Boulavard 650 s40 backfires

toneison, what did the dealer say?