When did Yamaha come out with the YZ400F?
The thump heard round the world: The 1998 YZ400F was such a shock to the motocross industry that none of Yamaha’s Big Four competitors would even offer a direct competitor for five more years. It was a tremendous technological achievement and the start of a new four-stroke revolution.
Is there a problem with my 98 YZ400?
I have a 98 YZ400 that I bought new back in 98. I have to say this bike has been amazing. Over 10,000 miles and not one problem with the engine or transmission. Been very low maintanance. Haven’t ridi’n it in quite sometime and I think it’s in need of a jetting change and carb cleaning. I can’t get it started and if it does start it runs terrible.
Is the fuel screw in a 98 YZ400F stock?
48 pilot (45 is stock), fuel screw 2 turns out (1.4 turns out is stock), 180 main (175 is stock), needle position one clip richer than stock (stock is middle position.) Good luck! I’ve got a ’99 YZ400F (bought new in 99).
How long does gas last in a YZ400?
I’m in the AZ desert ride in about 70 degree temps and elevation is between 500 and 1000ft. I’d appreicate any feedback. Thanks. Mike, In Ca the gas will last about 4 weeks before it starts to clog up the jets.
How big is a 1998 Yamaha YZ400F motorcycle?
The rain finally showed and so did the weight of the YZ400F At almost 260 lbs in ride trim the 400F got very heavy when traction was lost and you had to stab your foot on the ground to keep the bike upright. Try any leg save and you will know you are on a heavy motorcycle. During the drier parts of the test the bike was magical.
What kind of gas does a Yamaha YZ400F use?
A twist of the throttle and the 39mm Keihin with accelerator pump squirts a blast of 92 octane gas into the intake system. Don’t run race gas as it can harm some internal parts of the carb.
When did the Yamaha YZ400 dirt bike come out?
Honda and Kawasaki had nothing in the Open class, while Yamaha and Suzuki had nothing for the coming of the Maico 490. On the off-road side, Yamaha expanded the IT line to include an IT400. 1980–’81: Yamaha quickly acted to correct the problem and presented the YZ465. It was a great bike in every way.
When was the Yamaha yz490 dirt bike discontinued?
The Yamaha YZ490 was discontinued in 1991, and the 500cc championship itself was abandoned by the AMA in 1993. But, that wasn’t the end of the big Yamaha saga in pro racing. In 1998, the YZ400F changed everything.
What’s the hot start button on a Yamaha YZ400F?
You just have to learn the routine. The YZ400F has a “hot start” button on the carb to aid starting when the engine has been running a while. It lets cold, fresh air directly into the intake manifold, but I never found the need for it. That doesn’t mean it won’t come in handy some time.
The Yamaha YZ490 was discontinued in 1991, and the 500cc championship itself was abandoned by the AMA in 1993. But, that wasn’t the end of the big Yamaha saga in pro racing. In 1998, the YZ400F changed everything.
How many horses does a YZ250 400F have?
For starters, the stock engine pumps out 42 horses and does it with a red line at 11,200 rpms. A stock YZ250 puts 43 ponies to the ground but signs off before 9,000. The 400F also has almost non-existent engine braking.
Can a Yamaha YZ400F start hot or cold?
The YZ400F will start on the first or second kick, hot or cold. You just have to learn the routine. The YZ400F has a “hot start” button on the carb to aid starting when the engine has been running a while. It lets cold, fresh air directly into the intake manifold, but I never found the need for it.
For starters, the stock engine pumps out 42 horses and does it with a red line at 11,200 rpms. A stock YZ250 puts 43 ponies to the ground but signs off before 9,000. The 400F also has almost non-existent engine braking.
What kind of motor does a Kawasaki YZ400 have?
The YZ400 was redesigned with a short-stroke motor that wasn’t as effective as the one it replaced. This allowed European makers—mostly Maico—to get back in the game. Honda and Kawasaki had nothing in the Open class, while Yamaha and Suzuki had nothing for the coming of the Maico 490.
What kind of fuel did the Yamaha YZF use?
The 39mm Keihin FCR used on the YZF was a miracle in four-stroke performance at the time. It allowed for unheard of response and preciseand carburation on the big Yamaha. It would take the advent of fuel injection to finally displace this ingenious piece of hardware.