12RPilot
Pro
Posts: 1094
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posted June 26, 2004 03:51 AM
Opened up exhaust....Uh oh!!!
Since my exhaust can is trashed and I had it off the bike anyway, I removed the cat and drilled many 1/2 inch holes in the baffle plate. Late last night I finally got around to starting the bike to blow out the pieces and was greeted with a nasty, tinny sound. But even worse, it has a big hesitation off idle when revving the motor. And that's not even under load. I've never heard this mentioned on any other thread about opening up the stock exhaust. My question is: Am I risking a really lean engine at the track this weekend? I'm almost ready to plug the baffle plate back up.
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If you aren't an AMA member, you're part of the problem.
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Iculukn
Expert Class
Posts: 200
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posted June 26, 2004 05:33 AM
I want information on this...Answer him before I get home next (45 days) and start thrashing my stock can! PLEAS 
-lukn
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bovinespongiformencephalo
Pro
variant Kreutzfeldt-Jakob
Posts: 1060
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posted June 26, 2004 06:50 AM
I drilled 3 1" holes in the baffle plate and made a 2" hole down the center of the cat. Sounds great, works better.
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12RPilot
Pro
Posts: 1094
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posted June 26, 2004 07:31 AM
OK, was just out in the garage testing further. After letting it warm up for a while, the hesitation wasn't near as bad as last night. The tinny sound wasn't as bad either. (I wonder if revving the bike next to the compound miter saw set the saw blade a ringin'). Anyway, went for a short ride down the block after adjusting the idle up and the hestitation was very minor. My idle was pretty low to start with. Since the bike is set up for the track (ie. street illegel) I can't really test much more until I get to Grattan tomorrow. I hope this was all a false alarm. I'd feel stupid but at least we would know.
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If you aren't an AMA member, you're part of the problem.
NESBA #209
http://www.bikepics.com/members/12rpilot/04zx10r/
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Iculukn
Expert Class
Posts: 200
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posted June 26, 2004 03:32 PM
12RPilot, keep us in the know, ride safe and let us know your thoughts after track -lukn
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A "99.99% open mind", is still closed!
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12RPilot
Pro
Posts: 1094
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posted June 26, 2004 04:19 PM
Roger that, Iculukn.
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If you aren't an AMA member, you're part of the problem.
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sabersaw30
Parking Attendant
Posts: 8
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posted June 26, 2004 04:42 PM
I gutted my converter but left the baffle alone and it works awesome no hesitation whatsoever.Sounds about the same just a little deeper when you romp down on it.
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TurboBlew
Moderator
BUSY DOING THE SCHIAVO
Posts: 4590
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posted June 26, 2004 05:13 PM
COuld it be the bike wasnt at operating temp?
I couldnt see how freeing up the exhaust would cause a stumble unless you disconnect the flapper valve.
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swft
Needs a life
Full throttle!
Posts: One MEEEEEELLION
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posted June 26, 2004 05:33 PM
Maybe the flapper valve isn't operational until the bike hits operating temp? Sorta an 'open loop' thing?
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bovinespongiformencephalo
Pro
variant Kreutzfeldt-Jakob
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posted June 26, 2004 06:51 PM
 Edited By: bovinespongiformencephalo on 26 Jun 2004 19:52
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widowmaker
Expert Class
Posts: 378
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posted June 26, 2004 08:23 PM
Edited By: widowmaker on 26 Jun 2004 22:01
Is that what your race team mechanic told you to say swft?
And swft tell your mechanic it's called a exhaust valve not a flapper. LOL,
the flapper is the thing between your nose and your chin. 
___________
DOGS NAMES swft & fish
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TurboBlew
Moderator
BUSY DOING THE SCHIAVO
Posts: 4590
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posted June 26, 2004 09:00 PM
widow... you a resident stalker now? 
How about try posting without editing.... you're losing what little credibility you had.
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widowmaker
Expert Class
Posts: 378
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posted June 26, 2004 09:08 PM
Yes I'm a stalker , you alway's have to get your two cents in on every topic don't you turboblew dog fucker.
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widowmaker
Expert Class
Posts: 378
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posted June 26, 2004 09:20 PM
hey I hope this don't hurt your feelings if it does I'm sorry.
turboblew dog fucker, I know what your doing your trying to get the most posts award even if you maker sence or not, or you want everyone to think that you must know something about motorcycle's with all those post's.
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TurboBlew
Moderator
BUSY DOING THE SCHIAVO
Posts: 4590
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posted June 27, 2004 05:24 AM
Nope...not at all. Do the math ... 2800 posts divided by 4+ years. What's that like 2 posts a day?
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12RPilot
Pro
Posts: 1094
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posted June 27, 2004 02:39 PM
Well I just returned from the track. It appears I cried wolf. The exhaust was a total non-issue. Didn't seem to help nor hinder the bike. Of course, at the track I don't spend any time off idle. I think I was just having a stupid fit because it was late at night and I was thrashing on the bike. Sorry for any worry I may have caused fellers.
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If you aren't an AMA member, you're part of the problem.
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http://www.bikepics.com/members/12rpilot/04zx10r/
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widowmaker
Expert Class
Posts: 378
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posted June 27, 2004 03:03 PM
Do the math ... 2800 posts divided by 4+ years. What's that like 2 posts a day?
TurboBlew
Date Registered: October 16, 2001
I guess I would have to do the math because thats more like 3 post a day.
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fattkaw
Expert Class
Posts: 277
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posted June 27, 2004 07:34 PM
LAMemaker getting off the subject again!!
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salsa1
Needs a life
Posts: 5971
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posted June 28, 2004 06:50 AM
I drilled several 1/2 inch holes and then made them larger with horeshoe stake. ZX-10R does not seem weaker anywhere in powerband or any problems whatsoever.
sounds much better than stock to my taste. BTW 4+ hp been reported with just two one inch holes thru Blocking plate.
Hopfully I did better;at least theoretically it makes sense to me.
Just removing Cat is not enough for significant gains I think..
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swft
Needs a life
Full throttle!
Posts: One MEEEEEELLION
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posted June 28, 2004 06:56 AM
Hey widdle-dicker!!
You gotta be the lamest fucker I know! You manage to catch shit from peeps with every post!
Back to topic:
12RPilot - Good to hear that it felt good on the track! How was it pulling from down low?
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bovinespongiformencephalo
Pro
variant Kreutzfeldt-Jakob
Posts: 1060
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posted June 28, 2004 07:54 AM
Three things about this thread:
Setting the idle low is for Harleys, not track bikes.
On-off throttle is very important and already sucks on this bike (abrupt) if the mod makes it worse (it might) that IS significant.
"Pulling from down low" is definitely not an issue at the track. If you think it is you geared wrong.
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K-is king
Parking Attendant
Posts: 19
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posted July 01, 2004 02:04 AM
like your style widowmaker,Always thought that swft was a dog molesterer
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