Slide Theory, Carb Models, and Jetting

[jpelaston]

Can anyone tell me if the slide from an AS1 will work in my AS2?

[GMP]

Yes, they are the same slide design.

[n_green]

Jakobi I am about to send off my carb and head for a bit of work, between that and my current schedule I won't be able to ride for the next month or so.

And when I get my carb back it'll be oval bored 36/39mm so I'll have to start from scratch with my jetting before I can run back to back testing with non-notched #7 slide.

So, in light of education would you be up for testing my notched #6.5 slide and posting up results. I'm happy to post it up to you and leave it with you for a week or two. If you're keen let me know.

[GMP]

I just tried the notched #7 again, this time with a richer #48 pilot. Same JD Blue #3 and 180 main. MUCH better! Does not exhibit the lean pilot symptoms and low end is stronger. This is absolutely contradictory to what I have been told about notched slides(that they make the pilot ckt more sensitive and require a LEANER pilot).

[Jakobi]

Thanks for the offer re the carb. I don't think I'll really have the time other than to drop it in for a quick squirt down the street though. Gimme a few days to recover from the weekends ride and I'll get back to you. I'm all biked out! Should be some good pics and vids coming shortly!

[john r b]

I hope some one can tell me if I may use a jd jett kit for a 36mm.
On my new 12' 250 xc which has a 38mm I believe. A shop has sold me a kit for a 11' gg. I won't name the shop. Thanks

Presently I'm running in the bike
170 main
38 pilot
Blue needle 4th position
#7 slide no notch
air screw 2 turns out

[Jakobi]

Originally Posted by john r b

I hope some one can tell me if I may use a jd jett kit for a 36mm.
On my new 12' 250 xc which has a 38mm I believe. A shop has sold me a kit for a 11' gg. I won't name the shop. Thanks

Presently I'm running in the bike
170 main
38 pilot
Blue needle 4th position
#7 slide no notch
air screw 2 turns out

The needles are the same between the kits and for 2011 some bikes came with 36mm and 38mms so JD offered one kit with instructions for both carbs. Your shop wasn't wrong What does sound wrong is running the rich needle in a rich clip position with a main that small. The settings you have settled on actually sound alot like what those with 36mm carbs are enjoying.

If it is a 38mm your settings willl depend if its an AS1 or AS2. Either way one would generally expect a much larger main to be used. You haven't specified any details re fuels, temps, altitude etc. so hard to provide any more specific info.

[n_green]

Hmm just pulled the slide out of my mates KTM300 and he has a notched #7 slide so I don't think there will be any point in comparing the two now.

Bugger.