vacuum slides

[The Buddha]

OK Nylon #4 from lowes seem to be the only ones available here too ... and 1 of those will work fine.
Now your symptom ... 5.5 to 8K bogging ... sounds rich ... just a shade ... lower needle ... the needle from DJ has a drastic taper in in at one point, set it higher and you'll over richen ... too low and it will probably not make it that lean ... One reason why I prefer the stock needle again is the fact that its taper is gradual ... But lower it ... the needle sensitivity is pretty acute in that things case.
Cool.
Srinath.

[DrtRydr23]

OK Nylon #4 from lowes seem to be the only ones available here too ... and 1 of those will work fine.
Now your symptom ... 5.5 to 8K bogging ... sounds rich ... just a shade ... lower needle ... the needle from DJ has a drastic taper in in at one point, set it higher and you'll over richen ... too low and it will probably not make it that lean ... One reason why I prefer the stock needle again is the fact that its taper is gradual ... But lower it ... the needle sensitivity is pretty acute in that things case.
Cool.
Srinath.

I tried lowering it today and it did not seem to help at all.  I've got the clip on the highest notch, putting the needle at its' lowest point.  I'm thinking I'm going to try your rejet tomorrow and see how that works.  The  jetting matrix from Mikesgs500 website says to use 147.5 mains and two washers.  I'm sure 1 washer will work, but I was wondering about the main.  Would it be better to use the 150 or 147, or would it make a difference?  I don't have a full exhaust system, just a Cobra F1R slipon.  The altitude here in KC is about 100 ft lower than Charlotte also.

One last thing, I removed the corrector from the DJ kit with the hole in it, which did not seem to effect my bikes performance much.  However there are still tapped threads in the slides.  Should I drill the threads smooth or will they not effect anything?

Later,

John

[The Buddha]

Threads in the hole is OK for now ... lets see where you end up ... and fine tune it in a bit. Yea so dropping needle didn't do much ... OK ... stock needle and 150's then ... See I was doing the carbs from my00forest today and I was thinking ... heck one reason why the damn jetting seems to work so well when I set up the thing off the bike and each persons bike is a bit different ... and it still seems to work fine ... the jetting is quite in sensitive to needles. Our mains are large enough to flow fine at intermediate throttle postions and WFO is nearly un metered by needle ... AKA needle has no severe contours, like some DJ's have a step in them, the DJ for GS has a steep taper in that last 1/2 inch and then goes to a point ... sorta making mixture selection too sensitive to needle ... we need to be less sensitve to everything ... we can be waaay off ... and still have a bike that starts up on the coldest day and runs fine on the hottest ... Miss by quite a bit, or have varying levels of compression etc in each of the bikes and it still works ... whihc is why I guess jetting by remote control works ... now 100 feet is nothing ... 1000 feet is the smallest step that may bother it. More like 2500 ft + ... Cobra is like a slip on ... 150's, 147.5 maybe OK in summer, you dont want a lean bike in winter ... you'd have trouble till it gets hot hot hot (20+ miles) ... My 150 mains was fine in winter in Canada, and in summer in California ... Just pretty much the whole continent of US will take that ...
Cool.
Srinath.

[DrtRydr23]

Thanks for all the info Srinath.  If it all works out then you've been the biggest help a guy could ask for.  If it doesn't, then at least you still gave me something to go on....and I could probably assume that the problem is from something other than the jetting and needles.  Possible vacuum leak or something wrong with the diaphragms on my slides.  Either way, thanks alot for all your help and I'll let you know how it turns out.

Thanks,

John

[The Buddha]

No ... diaphragms are fine I'll bet ... why ... You're crapping out between 5.5K and 7.5 K ... over 8 is fine ... torn diaphragms will let you run great to 5-6 under full load (5th or 6th gear) and then you hit a wall. Your needle is wrong ... somehow its not being corrected by dropping ... now OK what is your float level ... you may be 1-2 mm high on 1 ... Do your diagnosis first before tearing it apart ... you'll be destroying your evidence and will never possibly find out if you start tearing it apart that often. Its all thinking ... making 1 change and studying it ... heck I filled up a good 60 pages with notes when I did this sheite ...
Cool.
Srinath.

[DrtRydr23]

No ... diaphragms are fine I'll bet ... why ... You're crapping out between 5.5K and 7.5 K ... over 8 is fine ... torn diaphragms will let you run great to 5-6 under full load (5th or 6th gear) and then you hit a wall. Your needle is wrong ... somehow its not being corrected by dropping ... now OK what is your float level ... you may be 1-2 mm high on 1 ... Do your diagnosis first before tearing it apart ... you'll be destroying your evidence and will never possibly find out if you start tearing it apart that often. Its all thinking ... making 1 change and studying it ... heck I filled up a good 60 pages with notes when I did this sheite ...
Cool.
Srinath.

Yeah, but I can't get to 8 in 5th and 6th gear at all under full throttle unless I run the rpms up in a lower gear and then upshift while still being at 8 or above.

Also, I changed the needle to stock (with one washer under it) and the main jet to a 150 and I'm still having the same problem.  It seems a little better, but it still has the same problem.  It's definitely rich when its boggin down though, because if I hold the throttle open while it's bogging I can smell gas.

I'm a little tired of messing with it, and it is rideable, so I'll probably take a little break for a while before I look at it again.

[The Buddha]

What is your float level ... do external check with U tube.
Cool.
Srinath.