Red line is 7000 on the DT250 .....so I take it that it pulls strong to at least there ?

Once you have at least 100 miles on your new top end....brief run ups thru the gears past red line will not hurt anything.

Where most damage occurs is prolonged high rpm running...say down the highway trying to see how fast a bike will go.

Well that's great feedback.....keep us posted on your machines performance.

7000 rpm or even a short trip to 7500 to 8000 will not hurt a DT250. these engines can pretty much handle it.

I got a DT400 that feels best anywhere from 6000 to 8000 rpm. these revs won't hurt these engines.
here is that DT400 zinging to 9500. of course I would never spin it that tight under a load and it would not produce any power there.it drops off drastically after 8000.

This image is hidden for guests.
Please log in or register to see it.

We are accepting orders for two more Sleeper Pipes for 2015.....

send me a PM if you would like to send your pipe in or if I can answer any questions?


We are currently in the process of finishing up SP40 and SP41.

Thanks for everyone's support we really appreciate it !

We are down to one spot left for 2015 ....so let me know ?

We have taken the last two orders Sleeper Pipes for 2015....so we are not accepting
any new orders till further notice.....

We plan to get started again in January 2016..... thanks again for your support !

We are now accepting new orders for Sleeper Pipes

Updated Sleeper Pipe Price List
1969-1973 AT125/CT175 $189. usd
1969-1973 DT250/RT360 $209.
1974 DT250/DT360 $219.
1975-1976 DT250/DT400 $219.

Misc internal pipe repairs only (no Sleeper Pipe Mod) -time & material $115 min charge

Customer is responsible for all shipping charges

Please email me at This email address is being protected from spambots. You need JavaScript enabled to view it. or PM here if you would like to place an order or have any questions ?

Typical turnaround on the Sleeper Pipe conversion is about two weeks or less after we receive your pipe.

Thanks again to everyone here for your continued support !

Meis -

concerning this line -- Misc internal pipe repairs -time & material $115 min charge

What is an example of something that causes the extra charge?

Is it common on a pipe that appears in good condition from the outside?

Getting close to doing this but wondering about the chance of the cost increasing 50%

I maybe should have clarified a bit more.....sometimes we have customers that simply want their existing pipe repaired with no Sleeper mod. For example a rare 1968 DT1 pipe that has a loose baffle rolling around inside....the $115 min charge applies to that type of situation.

If you send in a pipe for the sleeper mod we do an examination of your pipe before any work begins and if their is additional repairs needed I will advise on the cost before any work begins.

Typically its minmal...say broken or stripped heat guard screws ...or if their are dents you want removed...

I hope this helps clarify things ?

We just finished up SP45 for PKreimer



It is for his DT250A.....



After completing the "sleeper mod" we thoroughly cleaned the pipe and silencer



Pipe is now on its way back.......Paul please be sure to post performance results of your pipe here as we all want to know your ride impressions !

If your considering a Sleeper Pipe for yourself feel free to contact me and I can answer any questions ?

Or if you have a pipe not listed and want it 'sleeperized" please contact me as I am sure we can help you !

Dave. Your welds are very nice and I just love the SP number plate no. designation.