Supertrapp IDS2 on '03 KTM Adventure

Hi Drifty.

Interestin' design. and steel wool! that work good enough as a baffle? I would think that would last a touch longer than fiber. might be worth investigating... if you come up with the pics let me know.

So I am getting the numbers in order for the carb jet shoppin spree. This is what I have so far:

from Arch and Flanny: 1.1 air jet BS30/97 (Sudco #002-156)
- everyone did this? I would like to know if this is important (PITA to change). Arch thinks so...

from creeper et al: 150-160 main jets, especially the 157.5, dunno the Mikuni part number but can use the Mikuni Harley HSR main jets. Just to make sure I get the right thing, which one of these is it:

Sudco's List
Main Jets
4/042 Large Hex
Fits Needle Jets 159, 166, 176, 183, 188, 192, 193, 205, 211, 224.
Sizes #50-#200 available in increments of 5, #200-#720 in increments of 10.



M10/14 Small Hex
Sizes #50-#200 available in increments of 5.



N100.604 Large Round
Fits Needle Jets 171, 188, 196.
Sizes #50-#205 available in increments of 2.5, #205-#210 in increments of 10.



N102.221 Small Round
Fits Needle Jets 171, 188, 196. Sizes #50-#200 available in increments of 2.5.



N208.099 Press In Type
Fits late model Ducati CV, Yamaha CV & YZF750.
Sizes #110-#140 available in increments of 2.5.



==============

If the idle screw takes more than 2 turns out I will look into the pilot jet too. I am guessing it would be one of these but have read nothing except creeper saying he didnt need it changed (same setup as mine will be):

Sudco's List:
BS30/96
Application:
OEM CV Carb
Order No. Size
004-054 #30
004-055 #32.5
004-056 #35
004-057 #37.5
004-058 #40
004-059 #42.5
004-060 #45
004-061 #47.5
004-062 #50
004-063 #52.5
004-064 #55
004-065 #57.5
004-066 #60

That's what I needed to hear; just like the pilot jet. Stepwise. Gotcha.

Have you ever found the bike unhappy at high altitudes? Would it be worthwhile to have some smaller ones? I guess the stocker is pretty small with the mods; maybe that one is good enough?

N100.604 Large RoundFits Needle Jets 171, 188, 196.
Sizes #50-#205 available in increments of 2.5, #205-#210 in increments of 10.

Thanks for that; I believe you about the parts but this is all pretty new to me. I have rebuilt carbs on my old 75 RD350, replaced the ignition with optical sensors, and various other things, but I am cautious with the KTM. Just need some confidence I think.

Stepwise again; if not then its the pilot screw for it. Probably won't be needed as our bikes will be near identical mechanically. In styling, I can't touch the pimpmobile.

Still can't find any slide mod threads... but I will dig around in the motor manual (thanks a mil matey peeps!) to see if I can spot this. Basically I need a 3mm metal bit to hog out some holes? Then what - any filing? Damn search engine...

Riding? Almost every day - just not enough of it to the wide open spaces. With the little lady gestating, I am relying upon the bike for commuting. Kind of a shame for such a machine but it does the job easily. Maybe I should start using the RD350 for that and let the KTM off the hook more often (short haul to work).

I have this weekend free (!) and if I can get the stuff (jets and slide drilling protocols) together I will do this shiz.

BTW, did you have any comment on the Air/Fuel mixture equipment? Seems like a nice thing to check. I don't have $200 bones to buy one like the permanent mount K&N but there are others that are cheaper here and there. The only question is do they work and what do I do with the hole in the header after I get done testing the bike? Would it be worth it to have one mounted on the bike? I liked Jerome's Temp/Volt gauge on his bike...

http://www.advrider.com/forums/showthread.php?t=59075

So I am installing the IDS2, everything going well. Unfortunately it looks as if I only have two race cores and the disc/jetting info I have is for the quiet core that everyone else installed...

So I guess I will have to experiment with a few discs (how few can you get away with?) and maybe a 160. I bet this is gonna be loud (i.e. not street legal...). Is the Akrapovics street legal? The Supertrapp instructions says that the race core is NOT. :eek1

I will go pick up a few jets 157.5, 160, ? and get busy on this. It would be nice to finish up today.

Thanks for any ideas; even from the peanut gallery.

just stay off the gas. it won't be THAT loud. snicker snicker...
no really they're not that loud. it's not like an uncorked WR450 there is still abit of dampening in the discs too. all else make you're own quit core.

The guy I bought my IDS2 from (quiet core) talked me out of a race core, only because he didn't have one in stock. So I called him and we spoke at length.

Oh - the guy I ordered from includes the mid-pipe for $250 shipped ! DEAL!

Anywhoo, he said I'd pick up a couple HP above 5K rpm with the race core, and lose a hair below. To me, that didn't seem reasonable to give up hp in the part of the rev range most of us spend most of our time.

Told the guy I'm a fan of torque, useable torque. He said get the quiet core. Oh, and he does a ton of testing with sound meters and dynos. He's tested the race core at 5-6K rpm and it hits over 100 decibels.

YMMV,
Barry

Thanks fellas, gulp. I have the pipe installed and used two of the brackets to make an arm to reach the midpipe.



Seems to fit pretty good with a little home made rubber spacer. I put in 3 discs and will start with a 160 main. I am doing the carb mods tonight, including (I think) drilling the vacuum piston ports aka slide holes to .125" or 1/8 - don't have a.110" or 7/64ths bit. More tommorow.



ps - thanks creeper

I finished the IDS2 installation. Once again, another noggen, another solution to the pre-99 hanger config. My solution was prompted by the desire not to drill more as the rivet and vacuum ports (slide) drilling is plenty for me. So I spent a little time playing around with the available parts and came up with that arrangement shown above. Kinda like a little "arm" using the two remaining hangers (one of which is not needed elsewhere). I just needed to make a little rubber spacer to mate the second hanger with the midpipe hanger - see it in the pic above. I think it should work. More:





It really worked to hook up the springs first, then the back hanger as shown in PASSMORE and creeper's installations like this:



And then just work on the midpipe hanger. I like puzzles.

In the end, mine ended up about here (note the giant gaping hole running through the pipe with no sparkcap on yet - that goes straight thru to the midpipe... :eek1):



More later after I finish the carb mods. I had to pester the hell outa creeper for some tips on jetting the race core version. No, I don't really want it to be loud, but I ended up with 2 race cores for now...

i just put the race core on my 1997 620rx/c yesturday. i need to work on the jetting and quieting her down a little by taking out a few discs (started w/10) but she looks and sounds great!

i was wondering though, all the talk about sound levels and whether it's DOT is this a real concern where you live and ride or is this just for personal preference and long term riding/hearing comfort? when i ride long distances (over 30 min.) on pavement i wear earplugs and then remove them when i get to the trail or fun forest service roads.

BTW Creeper, now I understand why you posted pics etc. of the installation . While is was cake on my 620 rx/c the directions looked more like they were written by someone from asia than ohio

I think most of the IDS2 users here prefer it on the quiet side, not for rider comfort but for less offense to other back country folks...

Less sound = more ground....

CC

96db or less if/when possible. More OHV access trails are closed off every day... and it ain't because of knobbie tire tracks and beer cans... (well OK... the beer cans are a real pisser too)

I know its a little different from my 2003 LC4 Adv. but I would be interested in hearing about your continuing work on the IDS2. I will be starting out with 3 discs and a 160 main jet. This probably means squat on a 97 620 rx/c but what the hey.

The road noise levels seem to be of little concern to the fuzz. I/we will probably be loud, but as loud as the Akrapovics folks? Certainly not as loud as those nice fellers with their straight pipes on the harleys... :eek1

I hear the problem comes in OHV parks where the rules state lower dB. Of course as ChrisC and creeper point out, loud arse off roaders kinda screw da pooch for all by annoying people who then vote against off road freedom. So I looked into the quiet core while I was pickin up jets. List is about $75 bucks for a new one.

Hey Meat... you lit that thing off yet for a "sound check"?

(nervous laugh)

No!

I ran out of time with all the other things I was slated to do this weekend... all thats left is puttin the 160 jet in, then opening up the top and moving the needle position and drillin the vacuum port (slide) holes.

reassemble and prepare to tremble

This is turning out to be a new world record for time required to rejet a LC4.
Slow and steady wins the race... huh?

baby steps to glory

BTW, thanks again for the reassurance that this is really not rocket science and tinkering isn't going to hurt anything. I get nervous around expensive things like the KTM.

I feel comfortable tinkering with the RD350 because its old and resilient to abuse. And cheap if you screw it up. When I put on the optical ignition I accidentally reversed the cables to the two spark plugs (if you think the supercrapp instructions were bad, you should check out a one pager with a cheap line drawing from England... pathetic!) ; it ran! Didn't find out until I took it to my RD specialist. He was a little peeved when he found out I did it b/c it took him about 45 minutes to figure out why he couldn't set the timing . I explained and he seemed to cut me a little slack for it.

When I get the thing fired up, I should record the sound. I wonder if I could post a wav file somewhere...

BLAGAAAAA... BLAGGGGGAAAAAAA..... POP POP POPITTY-POP...... WUBBA. (with emphisis on the BLAG parts, and the BB in WUBBA)

Hey! whats this popping business? think i am gonna be too lean?