Yamaha Discussions about Yamaha ATVs.

Pro Circuit jetting

Old Jun 26, 2001 | 01:56 AM
  #1  
Blaster91's Avatar
Thread Starter
|
Trailblazer
Joined: Nov 2000
Posts: 72
Likes: 0
Default

I need help jetting my new Pro Circuit pipe. I have Boyesen reeds, uni air filter. Right now I'm running a 260 main, clip in 4th groove and pilot is 30. On top end its running good but it has no low end. Should I switch to a 250 main, 3rd clip and a 32.5 pilot? I dunno what to do. Any help would be great.
 
Reply
Old Jun 26, 2001 | 06:05 AM
  #2  
Ash's Avatar
Ash
Trailblazer
Joined: Jun 2001
Posts: 31
Likes: 0
Default

try messing with your idle screw. work it in quater turns
 
Reply
Old Jul 11, 2001 | 12:51 AM
  #3  
01BLASTERJW's Avatar
Trailblazer
Joined: Jun 2001
Posts: 26
Likes: 0
Default

did you get the problem worked out, what did you do? also where did you get your speedometer is it digital?
 
Reply
Old Jul 11, 2001 | 01:08 AM
  #4  
ridnwarrior's Avatar
Pro Rider
Joined: Jun 2001
Posts: 558
Likes: 0
Default

If it runs good on the top end don't change the main jet. It's all set. Your problem is with the low end. First thing to do is only make one change at a time. If you switch the pilot jet just play with that. Change it and then ride it. Don't rev it up though, just ride it around nice & easy using the pilot jet. Let it idle, go easy with it and then read the spark plug. I would change the pilot jet before messing with the needle setting.[img]i/expressions/face-icon-small-wink.gif[/img]
 
Reply
Old Jul 11, 2001 | 11:34 AM
  #5  
Blaster91's Avatar
Thread Starter
|
Trailblazer
Joined: Nov 2000
Posts: 72
Likes: 0
Default

I got it all figured out. I was acting like the choke was on but it wasn't. So I removed the snorkel and then moved the needle clip up one groove. It was in the 4th groove, I moved it up to the middle groove. Man it has power now! It just rips! And the plug is coffey brown. THe speedometer is digital. It looks a lot like the one on Rocky Mountain atv but cheaper. It a bicycle speedometer. It has a memory for top speed, average speed, clock, time of trip, trip, odometer and a timer. The only thing I wish it had would be a light for night riding. Maybe they do make some for night now. I'll check it out. It works with a magnet that you place on your front wheel, and then you align it with the sensor. You also have to enter the circonference of the wheel in the speedo.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ReconBayou
Kawasaki
11
Oct 31, 2022 05:37 PM
Sw00p
Polaris Ask an Expert! In fond memory of Old Polaris Tech.
2
Sep 24, 2015 02:50 PM
XxS0ccerstarxX
Honda
4
Sep 24, 2015 02:02 PM
XxS0ccerstarxX
Honda
2
Sep 22, 2015 02:40 PM
Brandon400
Kawasaki
0
Sep 5, 2015 08:44 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread

All times are GMT -5. The time now is 01:25 AM.