Ok, I adjusted the needles once on my Raptor. They are once notch away from the bottom of the needle.

But when I hit a steep hill, if my Raptor lugs the least bit it starts loading up and will quit and shoot a flame/spark out of the rear of the pipe. What can I do to stop this? Am I running to lean? Change the spark plug? What do I need to do? Adjust the needles again?

 

yer sparker is fouled up from too much oil! change the spark and jets & go riding. come back and post.

 

Your to rich on the needles, try a mid range test... go around 5k rpm in 3rd gear and if it stumbles its to rich.

 

it only does it when your lugging up hills.

doesn't do it any other time then that....runs perfect on flat ground, weather you are lugging or flying.

but if you hit a hill and keep good throttle, you go up it no problem, but if you have to let off it stumbles and almost floods and dies.

 

Your float adjustment is off.......

 

yes what he said. this happened to my bike.

 

hmm....how do i fix that? [img]i/expressions/face-icon-small-confused.gif[/img]

 

I'm going to start charging a quarter everytime I post this. Do you have paypal?
Sat June 21, 2003 5:17 PM



This is the best way.

The best thing to do is check it before you take it apart, with a piece of clear tubing. You can get the tubing at a hardware store for 20 cents, 1/8" clear tubing.

Thu September 05, 2002 3:11 AM



The quick & easy way to check float levels is to use a clear tube that fits the dump hole on the bottom of the carbs. You'll need at least one foot of tubing. Don't worry about an exact fit, the tubing can be a little bigger which will cause some of the gas to leak out but gravity is forgiving and is constant! You can get the tubing from your Yamaha dealer for a few bucks. Remove the stock dump hole tubing, put the new tubing on there & then bend up the other end and run it along side of the carb with the open end facing up. Then open the drain screw next to where the tube is connected & the level of gas in the tube should fill up & be level with or slightly above the bottom/top half of the carb's mating surface. If not, you'll need to adjust the float levels. A sign that the float levels are too high is if the stock drain tubes leak gas while your riding, you'll smell it for sure.
I just pop the carbs on the boots and set the tank on the frame and hook up the hose to check it again, you may have to take it back off once or twice to get it perfect. I also measure the amount that it is off and then take it apart, measure the float height and then bend the tab enough to raise or lower the float the amount that it was off. If that makes any sense.

 

Thanks. But how exactly did my floats mess up?

 

They are usually set to high from the factory.