yet another no idle thread.

[mrkartoom]

Just for comparison my dealer had been jetting his bikes with a 35p on the n1ef needle on clip #2, 178m - #7 slide. It was blubbering down low and onto the needle when I got it home and tested it. Only 1/2-top end seemed on. 60F /300ft when I was testing that combo.

As a comparison here is what Jim Senecal was running in his 2010 XC250 with 38mm ASII carb last year (NETRA HS Champion)
#7 slide
178 main
40 pilot
N1EF needle 1st clip (top)
a/s 1 out

[stainlesscycle]

thanks! this was a 99 ec300. if anyone knows what stock jetting was back then...

- i have all pilots from 35-50.. and all jets from 165-185 - i realy need to get some needles...

[GMP]

You can't compensate for a rich needle straight diameter with a leaner pilot. yes, they overlap some but not to the point of making the pilot change an alternative.

The 250s are different and generally easier to jet than 300s.

For years all GGs came jetted with 38 pilots and N1E* series needles(plus a couple extras with the bike), I have a bag of them. I have a good selection of needles, I'll see if there is anything in my collection that may be usefull to you.

Honestly, if I get a 300, the first two things I'll do is send out the head and correct the squish, and line up a leaner slide. If a #7 works so well in a 250 that is easy to jet (it does and is), my feeling is that it is leaning rich in a 300, especially over sea level and/or now that summer is almost here. I went through this same excersise on my '03 250 that came with a #6 for some reason, as well as my KTM300 as I mentioned before.

Stainless I'll get back to you on the needles.

[mrkartoom]

You and others have got me tempted about sending my head to RB. I need to keep playing around and see where I get and at least break this thing in, but there is something more finicky about this setup than I have experienced . . . discounting the BST on my LC4 of course. How much are slides anyway?

[stainlesscycle]

Originally Posted by mrkartoom

You and others have got me tempted about sending my head to RB. I need to keep playing around and see where I get and at least break this thing in, but there is something more finicky about this setup than I have experienced . . . discounting the BST on my LC4 of course. How much are slides anyway?

bst's are impossible. i switch to fcr and have better luck.

slides are around $55.. rb cuts them for $15 + shipping.

[GMP]

Its a known fact that GGs like most 2-strokes have loose squish numbers by design to account for questionable fuel around the world. Husky and KTM are no different, have done RBD head mods on them too for my brother and friends. Add this to the fact that bigger 2-strokes are always harder to jet. I just factor all this into the cost of the bike and get it done, then go ride. Just like suspension. You could go all the way and get the carb modded (including a slide cut) as well, very good reviews on that. I'd try the slide first though. I'm sure you could find a used #6 or #7 cheap and have it cut, keeping your original.

[GMP]

Stainless,

I have a few needles with leaner straight sections for you to try:

N1EG - one leaner (2.71mm straight dia) than the N1EF

JD Red - from the generic PWK 38 AS kit. 2.72mm straight dia. This is a bit lean in the 250, may work good in the 300.

1369MS - 2.70mm straight dia. This is very much like a CCK with another shallow taper cut after the straight section. Straight dia is the same as a DDK so it probably won't help but you wanted to try a CCK regardless. This was the OEM needle in older Honda CR250s before they went to the Mikuni carb.

Try them. If they do not work send them back. You may keep what works, just please replace the 1369MS if you like it as its my only one and if I get a 300 it will be on the list to test.

I have your address.

[mrkartoom]

Originally Posted by stainlesscycle

bst's are impossible. i switch to fcr and have better luck.

slides are around $55.. rb cuts them for $15 + shipping.

I had my KTM dealer price a slide for me from Sudco today. I have a bunch of credit built up there so I'm going to order a #8. With my discount and shipping I'm right at that $55 mark. Not as bad as I thought.

Between the carb mods, exhaust tuning, and many hours of jetting I eventually got the BST on my LC4 near perfect. A lot of guys did scrap it and go with FCR's, but I was bull-headed.

[stainlesscycle]

Originally Posted by mrkartoom

I had my KTM dealer price a slide for me from Sudco today. I have a bunch of credit built up there so I'm going to order a #8. With my discount and shipping I'm right at that $55 mark. Not as bad as I thought.

Between the carb mods, exhaust tuning, and many hours of jetting I eventually got the BST on my LC4 near perfect. A lot of guys did scrap it and go with FCR's, but I was bull-headed.

i have a scrap bst (bad valve body gasket - not available...) in pieces. if you want it i'll send it to you..maybe you can make use of the parts... let me know.

[stainlesscycle]

Originally Posted by GMP

Stainless,

I have a few needles with leaner straight sections for you to try:

N1EG - one leaner (2.71mm straight dia) than the N1EF

JD Red - from the generic PWK 38 AS kit. 2.72mm straight dia. This is a bit lean in the 250, may work good in the 300.

1369MS - 2.70mm straight dia. This is very much like a CCK with another shallow taper cut after the straight section. Straight dia is the same as a DDK so it probably won't help but you wanted to try a CCK regardless. This was the OEM needle in older Honda CR250s before they went to the Mikuni carb.

Try them. If they do not work send them back. You may keep what works, just please replace the 1369MS if you like it as its my only one and if I get a 300 it will be on the list to test.

I have your address.

WOW, thanks! i will see what i can make work. i was gonna order some on tuesday - maybe a little experimentation will get me a better idea of what will work better.. i really don't want to do another race with no idle circuit.