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Old 11-15-2004, 07:13 AM   #151
KayaKTM
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quiet core/race core

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
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Old 11-15-2004, 08:29 AM   #152
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dB

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
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Old 11-15-2004, 08:46 AM   #153
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Quote:
Originally Posted by ChrisC
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)
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Old 11-15-2004, 09:00 AM   #154
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Quote:
Originally Posted by outdrcpl
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 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...

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.
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Old 11-15-2004, 09:07 AM   #155
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Hey Meat... you lit that thing off yet for a "sound check"?
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Old 11-15-2004, 09:13 AM   #156
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Quote:
Originally Posted by creeper
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
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Old 11-15-2004, 09:23 AM   #157
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Quote:
Originally Posted by meat popsicle
(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?
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Old 11-15-2004, 10:09 AM   #158
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Quote:
Originally Posted by creeper
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...
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Old 11-15-2004, 10:15 AM   #159
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Quote:
Originally Posted by meat popsicle
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)
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Old 11-15-2004, 11:14 AM   #160
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Quote:
Originally Posted by creeper
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?
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Old 11-15-2004, 11:31 AM   #161
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Quote:
Originally Posted by meat popsicle
Hey! whats this popping business? think i am gonna be too lean?
It's the decel from high RPM, combo chop throttle/unavoidable exhaust air leak, don't worry it sounds cool "POP POP POPITTY-POP...... WUBBA".

Paranoia... thy name is Meat.
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Old 11-15-2004, 11:33 AM   #162
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quiet core

Just in case anyone is looking, the quiet core inserts are FS on thumpertalk for a very good price:

www.thumpertalk.com/catalogs/wb21-22.pdf

Quiet Core Insert
4-Stroke Core kit 3” External Disc-Black Painted Steel P/N10-767 $51.86

Think I read it right.
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Old 11-15-2004, 11:42 AM   #163
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Quote:
Originally Posted by creeper
It's the decel from high RPM, combo chop throttle/unavoidable exhaust air leak, don't worry it sounds cool "POP POP POPITTY-POP...... WUBBA".

Paranoia... thy name is Meat.
ok, just read on another thread I came across where they were complaining about popping - someone said they thought it was lean jetting.

I am a vicim man!
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meat popsicle screwed with this post 11-15-2004 at 12:46 PM
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Old 11-15-2004, 11:52 AM   #164
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Quote:
Originally Posted by meat popsicle
Just in case anyone is looking, the quiet core inserts are FS on thumpertalk for a very good price:

www.thumpertalk.com/catalogs/wb21-22.pdf

Quiet Core Insert
4-Stroke Core kit 3” External Disc-Black Painted Steel P/N10-767 $51.86

Think I read it right.
I do not think that is the core for the IDS2 muffler Meat... IDS2 stands for "Internal Disc System version 2".
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Old 11-15-2004, 01:25 PM   #165
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Quote:
Originally Posted by creeper
I do not think that is the core for the IDS2 muffler Meat... IDS2 stands for "Internal Disc System version 2".
Ah, you are correct. I get it now. "external discs" are the supertrapps with the discs showing past the end of the can. My bad.

The only line that actually says "quiet core" is this one:

Quiet Core Insert All 3” Mufflers 10-033 $20.50

Maybe that is the reverse flow business that fits in the center of the race core? Would be nice. I will try callin the ThumperTalk folks and see what they say.

I wish Supertrapp had more info on their webpage about this stuff. Their accessories link off the IDS2 page works now. The Quiet Cores list for $80-$90 depending upon the length and inlet diameter of the IDS2. Repack kits should be around $25 bucks for any core.
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