What kind of engine does a Yamaha XS850 have?
Because of this EPA crackdown for cleaner burning engines, Yamaha turned to Hitachi, not Mikuni, to outfit the XS850 with carbs jetted incredibly lean. This combined with a very restrictive muffler and complicated air intake plumbing meant the 850 pleased the sniff test, but performance took a dive.
Which is the last step in rejetting carbs?
Stationary adjustment (air screw/ fuel screw) The last step is adjusting the air mixture screw or pilot jet. This screw controls the air/fuel mixture when the engine is running stationary and helps the engine start smooth. Working on this little fellow can also indicate that your main jet is too big or small.
What are the air forks on a Yamaha 850?
The 850s continued where the 750 left off, introducing air forks to complement the adjustable shocks. A common feature on some cruiser shocks today, the air forks work in a similar fashion. Increasing or decreasing air pressure within the fork tube helps determine the stiffness of the front end.
Which is bigger a Yamaha XS850 or a Yamaha FZ-09?
Despite the bigger engine, wider wheels and tires, and the fitment of EPA-approved emissions systems, Yamaha says the FZ-09 tips the scales at a slim 414 lbs., ready to ride. The XS850 is a whopping 150 lbs heavier. That’s like carrying a pillion with you on every ride.
Because of this EPA crackdown for cleaner burning engines, Yamaha turned to Hitachi, not Mikuni, to outfit the XS850 with carbs jetted incredibly lean. This combined with a very restrictive muffler and complicated air intake plumbing meant the 850 pleased the sniff test, but performance took a dive.
What kind of jetting does a Yamaha XS650 use?
The only way to know for sure would be to take them apart and look. Stock jets for your model are 132.5 main, 42.5 BS30/96 type pilot, 135 air jet, and a fixed nonadjustable needle. The usual re-jetting for minor mods consists of going 1 to 3 up on the mains and 1 or 2 up on the pilots.
Do you need to change carbs on Yamaha XS650?
If the carbs are clean and working fine now, you might not need to do that much. Probably a size up on the pilots and a size or two on the mains. Then play with the needle heights if you can raise and lower them (can’t remember which carbs have adjustable needles) and obviously set your mixture screws.
What makes a Yamaha XS750 a collectible bike?
The 750 seemed to solve those issues, providing a surprisingly compliant ride. It, along with the distinctive engine, made the XS750 a collectible bike today. Horsepower is king, as the saying goes, and eventually Yamaha couldn’t ignore the fact customers were wishing for more of it.