I was looking at GregV's guide to Jetting. Someone told me the pilots are in the same area as the mains. Can anyone confirm this for me because I am jetting tomorrow and don't want to screw anything up. While I'm here,are there any other tips or suggestions anyone can give me.
Thanks again guys!!

 

Did you read the reply I wrote in the BT forum?Here it is.

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.

After the bowls are off both jets are right there.

 

Hi. Thanks for the reply. I will adjust the floats as necessary when I have the carbs apart. I am wondering where the pilot jets are located. I am changing the main jets and the pilot jets on the carburetor. I was looking at GregV 's site instructions and photos to jetting and don't know where the pilots are.
Thanks

 

There is no mistaking them once you get the bowl off. Check the float level like I said before you remove the carbs. If the level is close don't mess with the floats.

 

Ahhhhh...silly me...I will check the level of the floats before I take the carbs off...If all is ok proceed to take the bowls off and voila, no mistaking where the main jets and pilots are. Change em up, bowls back on and that's it.[img]i/expressions/face-icon-small-blush.gif[/img][img]i/expressions/face-icon-small-disgusted.gif[/img][img]i/expressions/face-icon-small-happy.gif[/img][img]i/expressions/face-icon-small-disgusted.gif[/img][img]i/expressions/face-icon-small-blush.gif[/img]

 

That's pretty much it. When you turn the mix. screws in and then back out to adjust them be careful not to tighten them down to far. some have been known to break the tip off.

 

Thanks alot for the help!! The srew is normally out three turns stock isn't it. So If I went about three turns in that should be the limit right. Oh. Is the stock setting for the needle on the 3rd slot.
Cheers!

 

I think the screws are about a turn and a half stock.The third groove would be the best place to start.
Did you get a jet kit?If so which one?