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TOPIC: Ultrasonic Solutions

Ultrasonic Solutions 05 Nov 2018 09:31 #1

  • Schu
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Two quick questions.
1) Those of you using the Harbor Freight ultrasonic parts cleaner for your carbs.......what kind of concoction do you find most effective?
2) Is it a coincidence that both my 75 DT250 and 400 both sound like they are blubbering down the road when they plane off at typical cruising speed? They start easy, idle fine, excellerate nicely, scream beautifully when thrashed, but simply sound awful when rolling a steady 45 MPH. Plugs are burning good on both bikes. Original owner of the 250 said it's always been that way. Stop trying to fix it! But it drives me nuts because none of my other DTs act this way.

Anyone?

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Ultrasonic Solutions 05 Nov 2018 15:30 #2

  • asco
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It might be a good idea to check the screen on the petcock going into the fuel tank. If you are not getting enough fuel at cruising speed that could be the cause!

a
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YAMA-LAND RESTORATIONS
818-521-2109
MINIBIKESERVICE@AOL.COM CUSTOM MINIBIKE (RALPH) 2002 110cc XR PAX RACING 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1969 125cc AT1-M MX (DELILAH)

Ultrasonic Solutions 05 Nov 2018 17:57 #3

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Yes I would like some different opinions on carb cleaning solutions also.

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Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger

Ultrasonic Solutions 06 Nov 2018 08:12 #4

  • RTD2
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Hot water to the max level and a teaspoon of TSP.

Mike
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68 DT1, 70 DT1C MX, 71 CT1C, 71 RT1B, 71 DT1E MX, 73 AT3MX, 70 Husqvarna 250 Cross, 57 Matchless G80CS, 76 Honda Elsinore; 2015 Yamaha FZ-09

Ultrasonic Solutions 06 Nov 2018 15:18 #5

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Hey Asco don't you have a secret recipe :whistle:
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Ultrasonic Solutions 06 Nov 2018 16:04 #6

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I’ve always had good luck with using simple green in the ultrasonic cleaner that I borrow but when that’s not available I use Berryman chem dip both have worked really well for me in the past.
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Ultrasonic Solutions 06 Nov 2018 16:16 #7

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yamahahaha wrote: Hey Asco don't you have a secret recipe :whistle:


Actually, yes I do ....

It’s already in print...

a
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YAMA-LAND RESTORATIONS
818-521-2109
MINIBIKESERVICE@AOL.COM CUSTOM MINIBIKE (RALPH) 2002 110cc XR PAX RACING 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1969 125cc AT1-M MX (DELILAH)

Ultrasonic Solutions 06 Nov 2018 16:31 #8

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I think I'll try

3 - tablespoons of TSP ..

3 - capfull's of Pine-Sol ..

And I'll heat it until I trip the breaker
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Last Edit: by Schu.

Ultrasonic Solutions 08 Nov 2018 09:27 #9

  • TerryM
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Schu wrote: Two quick questions.

2) Is it a coincidence that both my 75 DT250 and 400 both sound like they are blubbering down the road when they plane off at typical cruising speed? They start easy, idle fine, excellerate nicely, scream beautifully when thrashed, but simply sound awful when rolling a steady 45 MPH. Plugs are burning good on both bikes. Original owner of the 250 said it's always been that way. Stop trying to fix it! But it drives me nuts because none of my other DTs act this way.

Anyone?


It's been my experience that two-stroke singles never sound quite right unless they are under load pulling. If they sound right under acceleration, then what you hear when you let off the throttle at 45 (or 30 or 55) and are no longer 'pulling' full time, just maintaining speed, is most likely perfectly fine.

In a way, they kind of remind me of the old 'demand' or 'hit-and-miss' engines on early tractors and stationary engines, where they only fire when the governor determines that they are not up to the desired RPM. With no load, they sound terrible - rough and uneven. But put a load on them and they smooth right out and hit every time.
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Ultrasonic Solutions 08 Nov 2018 12:50 #10

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I mix Simple Green and distilled water depending on how grimy the parts are. Standard is 1 part simple green and 3 part distilled water for me.

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