I had the motor gone, and the dealer fixed it all up, left stock jets in that were 320, I am getting very poor gas milage, and also boggy on the low end, I don't think it's burning all the gas that it's getting. Put in 310 jets and still same just then i put in 300 jets and a little better. Anyone have any idea what the stock setup for a zr700 or powder special 700 is suposed to be at sea level? Anything would be great, thanks.

The chart on your sled should tell you the jets for sea level.

the chart is for high altitudes only, says right on it the sleds specifications are for 5000-9000 ft.

I would have thought it would have lower specs also,I know mine gives specs for higher alt, didn't know that. I had a 580 it had 370 jets 45 pilot for sea level 700 would probably be close to the 400 range, not sure though.

I run my 2000 ZR700 anywhere from about 700-1500ft, so I am not that much higher than you.

I use 320 mains which is what it came stock with.

I think one of the things you should check is the needle jet position. Mine came stock at the middle or #3 position. You move the clip down to get richer and up to go leaner.

Check and see where your needle is at. You will burn a lot of gas if that needle is in the wrong position. Since most of your riding is done in the midrange.

Also check your air screws on each carb. I believe that these sleds are sensitive to those adjustments. And at low speeds having it set wrong uses a lot of gas.


You should be able to get farther than 30 miles per tank. That is only about 2-3 mpg.

Granted these sleds get pretty terrible milage, but you should be able to get about 80-90 miles on a tank.

I can only get about 85 miles on a tank right now. But I am pretty sure my needles need to be dropped back to #3. I have them in #4 now, since I added twin pipes.

Good Luck.

the dealer set it to the richer setting, then we changed it to the stock number 3 position but still hard yet so we droped it one more i think, to the leaner and the power felt like when we first got it, wasan't boggy bottom end at all, and wasn't leaning out any. Had the 310 jets in it. Think i'm going to change the jets back to the stock 320 to be on the safe side. Dealer also said they "fixed" the screw settings, but weather that made it better or worse i won't know. Thanks for the help.

Chad.

One more thing to check, bottom out the choke cable adjusters and see if this helps, a choke that is not closed all the way will cause a very similar situation, and jetting will never really make it run right, will be overly rich and smokey at idle. Hope you get it figured out. Prowler

Yea she smokes at idol, I will check tomorrow with the choke, i heard that from another person today also, thanks for the help.

Chad.

If it does turn out to be the choke not closing all the way, after you get the chokes seated fully, be carefull you haven't leaned out the jetting too much. I just went through this last week, all the changes in jetting and clip positions and idle mixture just did not seem like they were changing much, until I shut the chokes all the way, then I had to richen it back up with the clip and idle mixture. Good luck. Prowler

This thing is getting waaaay too much fuel to be a regulated supply problem so its got to be coming from an unregulated source ie chokes or needle and seat. Your choke lever should have freeplay in the closed position. This must be adjusted with the airbox in place. If not the chokes I would look at your float system and see if fuel was getting past the needle and seat. A couple of jet sizes are not going to cause this type of fuel problem. Milage is usually controlled through the needle position. The main only starts flowing at about 3/4 throttle

I'll say choke and/or inlet needle and seat being a good possiblity. Do not try to fix this problem with jetting changes because you could easily find yourself with a visit from Mr. Squeaky. Make sure the carbs a clean on the inside, that the the inlet needle and seat are clean and functioning, thatthe float level is correct, make sure the chokes are fully seating and the vents are clear. All the fuel that does not flow through the pilot jet flows through the main jet. Read the spark plugs and piston wash to determine correct jetting for the conditions.

Hey just pickin at it now, How do I check that the choke isn't the problem? also on brownsleisureworld.com there are 3 different needles that can be on the zr700 wich is identical to mine. Could the wrong needle be the problem?

I just simply bottomed out the adjusters on the carbs for the choke cables, basically adjust it all the way in so you have maximum slack in the choke cable, should be shut at that point. See if it runs better, and then maybe adjust the slack corretly, but that's the easiest way to tell if that is your problem.
Different needles could make a small difference, but not as much as you need by the sounds of your gas milage. Try the choke first, then continue tuning from there. Best of luck...Prowler