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Old 06-16-2008, 02:14 PM   #1
nvydis
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texas emission laws and back pressure

im fixing to do a stocket header, midpipe, and slip on combo on the R6. i dont want to spend $2K on the full exhaust system for those of you wondering. my question is, would i still be able to pass emission in Texas? also, with this combo, i will have a straight/open pipe exhaust system. should i be concerned about lack of back pressure?
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Old 06-16-2008, 02:16 PM   #2
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no emissions for motorcycles in Texas
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Old 06-16-2008, 02:35 PM   #3
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I think there are still standards that you are supposed to meet for motorcycles, but there's no emissions testing during annual state inspections, so most everyone gets away with it...
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Old 06-16-2008, 02:38 PM   #4
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Quote:
Originally Posted by zampano View Post
no emissions for motorcycles in Texas
what he said! its just a safty inspection so there is no passing the sniffer
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Old 06-16-2008, 02:47 PM   #5
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As for your question about back pressure, there may be a gain of hp in the higher rpm's but your gonna lose some mid-power . I may be wrong.
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Old 06-16-2008, 02:49 PM   #6
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Quote:
Originally Posted by nvydis View Post
im fixing to do a stocket header, midpipe, and slip on combo on the R6. i dont want to spend $2K on the full exhaust system for those of you wondering. my question is, would i still be able to pass emission in Texas? also, with this combo, i will have a straight/open pipe exhaust system. should i be concerned about lack of back pressure?
As for the backpressure issue. I do believe you'd want to get a powercommander and have it tuned. You'll be flowing a lot more air and your fuel mixture will be all jacked up.

Im sure someone with more knowledge can chime in on this issue though.
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Old 06-16-2008, 02:52 PM   #7
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Quote:
Originally Posted by nvydis View Post
im fixing to do a stocket header, midpipe, and slip on combo on the R6. i dont want to spend $2K on the full exhaust system for those of you wondering. my question is, would i still be able to pass emission in Texas? also, with this combo, i will have a straight/open pipe exhaust system. should i be concerned about lack of back pressure?

Is a slip on combo a straight / open pipe????
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Old 06-16-2008, 02:56 PM   #8
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Quote:
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Is a slip on combo a straight / open pipe????
hmmm...didnt notice that.
good question. If the pipe has any baffles, it is not an open system. If it is a slashcut/dump pipe then it is open.
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Old 06-16-2008, 03:01 PM   #9
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State law says you must have "a performing muffler". No specifications as far as noise levels, etc.

There are no emissions requirements for motorcycles as of now, as Zampano said.

Back pressure shouldn't be an issue, as long as you have some sort of muffler and a full length pipe (AKA not cut off at the engine). The pipes themselves will add a certain amount of back pressure just by themselves.

What the heck is a Stocket header?
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Old 06-16-2008, 03:10 PM   #10
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If the inspection people want to be d*&ks and not pass you they can because it is very easy to tell when someone has modified their exhaust to the point where it is just a straight pipe. Cops could also pull you over, seen it happen. Straight pipe on sport bike, seems to be a little louder and more annoying to others around you than HD mufflers.
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Old 06-16-2008, 03:29 PM   #11
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Quote:
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no emissions for motorcycles in Texas
for the time being, prolly in the future.
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Old 06-16-2008, 03:31 PM   #12
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Quote:
Originally Posted by Squanto84 View Post
State law says you must have "a performing muffler". No specifications as far as noise levels, etc.

There are no emissions requirements for motorcycles as of now, as Zampano said.

Back pressure shouldn't be an issue, as long as you have some sort of muffler and a full length pipe (AKA not cut off at the engine). The pipes themselves will add a certain amount of back pressure just by themselves.

What the heck is a Stocket header?
typo. i meant "stock". looks like its a clear go?

also if i decide to get the bike tuned, any place in houston you would recommend? and give me a ball park what to expect on paying. im going to trow an air filter on there also....
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Old 06-16-2008, 03:52 PM   #13
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Andy at Metric Motorcycles has a dyno and is pretty good from what Ive heard.
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Old 06-16-2008, 03:59 PM   #14
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as far as bike inspections.....safety only. no emissions.
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