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Author Topic: Quiet DT1/RT1 Aftermarket Pipe?  (Read 1346 times)

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Offline Tahitian_Red

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Quiet DT1/RT1 Aftermarket Pipe?
« on: April 19, 2013, 09:46:37 am »
Which of the aftermarket pipes for the Yamaha DT-1/RT-1 do you think is the quietest?  We have a track that tests for sound and I want to pass and still use an era-correct pipe.
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Offline firko

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Re: Quiet DT1/RT1 Aftermarket Pipe?
« Reply #1 on: April 19, 2013, 10:00:45 am »
I've used a GYT pipe with a Supertrapp on the DT1 from Hell and it was as quiet as a stocker. Because of that I've put a Supertrapp on the Jemco on my new RT1 flat tracker.
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Offline John Orchard

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Re: Quiet DT1/RT1 Aftermarket Pipe?
« Reply #2 on: April 19, 2013, 11:58:19 am »
Quote from: firko on April 19, 2013, 10:00:45 am
I've used a GYT pipe with a Supertrapp on the DT1 from Hell and it was as quiet as a stocker. Because of that I've put a Supertrapp on the Jemco on my new RT1 flat tracker.


Are you running the Supertrapp with removable disc?  How many discs for a quiet noise level, how many discs for best performance?
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Offline firko

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Re: Quiet DT1/RT1 Aftermarket Pipe?
« Reply #3 on: April 19, 2013, 01:42:26 pm »
Quote
How many discs for a quiet noise level, how many discs for best performance?
It varies from bike to bike, I have 10 discs in my DT1 and 8 in the flat tracker but I haven't started it yet (hopefully on the weekend). It was a long time ago but I can recall adding and removing discs in the GYT pipe on  the DT1 until I found a happy medium. I assume I'll have to go through the same process with the tracker.
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'68 Yamaha DT1 enduro, '69 Yamaha 'DT1 from Hell' '69 DT1'Dunger from Hell, '69 Cheney Yamaha 360, 70 Maico 350 (2 off), '68 Hindall Ducati 250, Hindall RT2MX, Hindall YZ250a , Cycle Factory RT2MX flat tracker, Yamaha 1T250J, Maico 250 trials, '71, Boyd and Stellings TM400, Shell OW72,750 Yamaha

Offline bazza

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Re: Quiet DT1/RT1 Aftermarket Pipe?
« Reply #4 on: April 19, 2013, 02:27:33 pm »
supertrap web site telss more/less discs for leaner or richer etc
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