Went for a long ride. Come home turned it off. Half hour later went to restart it bit no go. Its been to various bike shops and ive gone over it exstensivley myself. All roads leading to an ignition/spark problem. It has a very strong spark but is a bit irregular and not firing at the correct time. The bike will fire but not start. Sometimes it fires a few times and goes to start but then it sparks before tdc stopping the piston dead. Other times it will load up the exhast with fuel and backfire while other times it will backfire through the efi. Two questions. 1: the alternator pick up with the square teeth has one section missing. When on tdc this section is 135* of from the staionary pick up. Is this correct? In my years the pick ups always been roughly inline at tdc. The key way hasnt sheared and evrrything seems fine. 2: the computers got three aftermarket earth wires earthed to it. Two are black and ones blue with yellow stripe. Theres writing and numbers on the back of the computer. It has few mods done including exhaust. Would the computer be remapped or fried?
2004 fse450 backfires and wont start
- Thread starter jethro
- Start date
GasGas
New member
These 450's are the reason their in the mess their in. They had no choice but to buy back hundreds of the bikes from Europe and send out countless replacement motors. They should have never released the bike. It's kinda too bad though, as the bikes were great when they worked. One of my all time favorite bikes. I had no idea just how good the bike was until I bought a left over 2008 YZ 450. The Yamaha had nothing on the GG 450 performance and handling wise. IMHO
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