Ran great in Winter, not so great in Summer!

[Banshee0028]

Ok, last time I went riding it was about 20' cooler than it was this time. Now its about 80-90' where I ride at here in FL. Last time out everything was about right on, possibly a bit lean on the main, but ran great!!!

 

Now for the first time, I noticed a pretty good bog\hesitation\ and sputterng a little in the midrange. If I let it get to about 75% or so, it will open up great WOT!!! Off idle is ok, and starts ok. It does take a while to start when cold, but thats been like that for a while, prob due for a rebuild one day.

 

So, I am thinking I need to lean out the needle for the hotter weather, right? I think its at the 4th position from top, 27.5 pilot and a 280 main. I tried to go higher on the main previously and got nothing but boggs and non-starts.

 

It has most bolt ons, vforfce 2's and a mild home-MX porting job.

 

Do I need to go richer instead?

Edited June 8, 2005 by Banshee0028

[justinklumb29]

I would try to go a little leaner on the main jets. the warmer the air the leaner you have to jet it. Try going down to 270's to see if that helps at all

[Big Blue]

Go down on the main.

[locogato11283]

i would try a 270 and see what happens. what do your plugs look like at 280??

[Banshee0028]

i would try a 270 and see what happens. what do your plugs look like at 280??

379583[/snapback]

hmmm...weird, thats 3 votes to reduce the mains!! I would think since WOT is fine and only the midrange is bogging, I would need to ruduce the needle position?

 

I have not pulled the plugs since the last ride, but previously they looked right on. I have not done a "true" plug chop recently, but prob need to. I do have a set of 270's here I can put in, but thought the needle would be much easier...

 

If the mains are causing the prob, I can try the 270's this weekend

[Big Blue]

If you lean out the main it will also lean out your needle.

[locogato11283]

those circuits overlap more than you think...