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Old 10-26-2011, 06:23 PM   #1
dtmeis
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Default Sleeper Pipe

Over the last few years DVM and I have developing the "Sleeper Pipe"... for those that don't know...it's an internal cone that is fabricated inside a stock pipe to give the performance of an expansion chamber while retaining the stock appearance of an OEM pipe.

The Sleeper Pipe mod is available for two types of pipes.

1969-1973 AT/CT 125/175

1968-1973 DT/RT 250/360

The Sleeper Pipe....also retains the factory spark arrestor so it can be used safely off-road.

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Old 10-26-2011, 06:32 PM   #2
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Quote:
Originally Posted by dtmeis View Post
Over the last few years DVM and I have developing the "Sleeper Pipe"... for those that don't know...it's an internal cone that is fabricated inside a stock pipe to give the performance of an expansion chamber while retaining the stock appearance of an OEM pipe.

The Sleeper Pipe mod is available for two types of pipes.

1969-1973 AT/CT 125/175

1968-1973 DT/RT 250/360

The Sleeper Pipe....also retains the factory spark arrestor so it can be used safely off-road.
My testimonial- Kicks butt ! A "MUST" have exhaust system !
Tried It at EF2. Loved the extra power. I will definitely get one for my DT1MX !
Worth every cent !
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Old 10-26-2011, 06:37 PM   #3
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At last weeks Endurofest I had a 250/360 Sleeper pipe available for attendees to to test out. The results were impressive and the feedback I received was very positive.

DVM and I have been running the Sleeper Pipe mod for the last 3 years and it has been thoroughly field tested.

I have been receiving lots of inquiries on the Sleeper Pipe mod so I am planning on taking orders later this week for the first run of DT250/RT360 pipes.

I am hoping some of the guys that have tried the "sleeper pipe" can give some details of what performance the "Sleeper Pipe" provided them ?
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Old 10-26-2011, 07:44 PM   #4
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I ran the sleeper pipe on my dt2 for on and off road rides. It worked well for both. It makes the whole power band come alive from top to bottom . The top does not fall off at 7000 but keeps pulling. My tack had never see the back side of 7000 it did not know what to do and it pinned it at 10. I know the motor was not turning at 10. The sound of the pipe is also very cool. Im in the process of getting one right now. Randy
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Old 10-26-2011, 07:52 PM   #5
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Dave - for another "show of interest" - please count me in for a pipe for a RT2 360 thanks! Randy
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Old 10-26-2011, 09:03 PM   #6
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Quote:
Originally Posted by daxiongmao View Post
Dave - for another "show of interest" - please count me in for a pipe for a RT2 360 thanks! Randy
Thank You sir !
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Old 10-26-2011, 09:14 PM   #7
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The inner workings of the "Sleeper Pipe"





You can see where the pipe needs to be cut open and rewelded.
The best way I found is with and an angle grinder with a metal cutting wheel. Make sure to always wear eye and hand protection while cutting and working with sharp metal.

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Old 10-26-2011, 10:29 PM   #8
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So here's the deal.

I am looking to build 5 or 6 DT/RT sleeper pipes. So I am NOW taking orders. If you want the sleeper pipe mod you will need to place an order within the next 7 days Weds Nov 1st is the last day I will accept orders.

The "Sleeper Pipe" mod comes with a complete satisfaction guarantee.... if within 30 days of receipt your not completely satisfied with the pipe's performance I will exchange your modified pipe with an unmodified stock pipe and refund your money. Please note I do not refund shipping costs....

You have two options with the mod.

A. $129. you cut open your stock pipe as per my instructions, remove internal baffles and remove inner liner...

B. $199 send your complete stock pipe minus the heat guard and I do the rest including:

-cut open pipe
- remove internal baffles
-remove portion of inner liner
- inspect spark arrestor and rear baffle
- fabricate "sleeper pipe" internal cone
- prep interior of pipe for welding
- hand shape and fit internal cone
- weld cone in place
- final shape and fit cone to cover
-refit and shape cover
-weld cover in place
- wire wheel weld area
- repaint weld area
- install and test sleeper pipe verify proper operation

* price does not include shipping to 92806

Send me a PM if you want to place an order ?
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Old 10-26-2011, 10:47 PM   #9
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Dave,
are you going to show just where we need to cut the backside out?
Whole hog or what !?!?
On the Bead? or underneath? Pictures???
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Old 10-26-2011, 10:57 PM   #10
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I was one of the fortunate few who got to test(seat of the pants style)the very impressive "sleeper" pipe. During the already excited atmosphere of EF2, Dave whips out a stock looking pipe and after fine tuning the jetting on Ricks 71DT1(came to EF2 needing fine tuning)installs the "sleeper" pipe. The "sleeper" pipe made a huge difference. Low end and mid range were enhanced enough to fell the difference. The top end is where this pipe makes things come alive. All the while allowing the motor to rev much easier, pulls to the top end much quicker. It's like it can breath better.

Dave put me down for one for the RTunoB.

Boy oh boy. The first mod for the RTunoB!

I've read the posts DTMEIS put up while he and DVM were developing the "sleeper" and they have alot of work and effort in this unit. It really came home to me after the test.
Sending PM now.

Last edited by ol brown shoe : 10-26-2011 at 11:00 PM. Reason: added comment
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