I am rejeting hopefully this weekend and am trying to find out beforehand about adjusting my floats as I have to change the pilots - what do I need to do? (and what should I not do?)

 

Loosen the carbs and flip them over with cables attatched. Turn the carbs upside down and adjust the floats until they are level with the carb base. Changing pilots is straight forward.

 

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 so its touching the carb housing where the float bottom half meets the top half. Then turn on the gas pitcock & 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.

If you need to adjust the float level, take the carbs apart & instead of following the manual's directions of flipping the carb upside down, just turn them upside down but not completley, more like at a 30 degree angle so you can look inside them from the side of the atv. The floats will come to a resting point between two extremes, that is where the float tang should be just touching the needle valve but not compressing it & the float should be 1/2" above the mating surface. The tang should be horizontal with the mating surface as well but if for some strange reason the float level is off, you can adjust them by slightly bending the float tang. This procedure is described in the manual except don't check the level with the carb completley upside down!

Also, while you are there, replace the needle valve/spring, its cheap, & if its bad the float level can be accurate but the gas won't shut off & will leak out of the drain hole as thought the levels are off while your riding.

 

sixsixT by dump hole is that the hole at the bottom of the float bowl, like an over flow? I am assuming its is another please be specific I am having problems with float level also.

 

Yes the fitting at the bottom of the bowl with a tube connected to it.Connect the piece of clear tubing to that fitting and hold the tubing up next to the carb with the other end facing up an inch or so above the bowl mating surface, then turn the screw out that is next to the fitting to open the drain allowing gas to flow through the tube.Then you can see exactly where your fuel/float level is.Don't forget to have your gas tank hooked up and the fuel turned on.

 

Thanks makes perfect sense now, will do this weekend.

 

TTT