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Rebuild/Service RC Valve Servo


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kabal

 
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Rebuild/Service RC Valve Servo

Fri Jul 13, 2007 8:54 am » Post: #1 » Download Post

I tried a search, but it does not work very well, cant get past the first page.

Anyway, I was wondering is the RC valve servo servicable? I see there are a couple of bolts/screws in it, that seem to split it in half?

Also is there a specific spec for the 4 cables? can they stretch?

BTW this for a MC16

thanks
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alannsr250

 
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Fri Jul 13, 2007 9:20 am » Post: #2 » Download Post

if it works id leave it as it is lol
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Honda nc23 CBR400 AERO 1986, 1990 honda NC23 Tri-Arm, 1987VFR400 NC24 Rothmans Rep, NSR250 MC16 1987, CL250s 1983. Moto guzzi zigolo 110cc 1958. Fantic 50cc 1972. Suzuki Cobra Race bike 500cc 2t 1975 , GP125 1975. Triumph T110 1954. BSA Thunderbird 1955. Ariel VB 600 1952, 1990 MuZ 125 etz.
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Dave Ett
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Fri Jul 13, 2007 11:44 am » Post: #3 » Download Post

The servo is generally a reliable part. The cables too don't tend to stretch, as thereis alomst zero force applied, until the valve becomes choked wih carbon.

When that happens the motor draws more current, and the PGM unit is usually the first part to fail.

I'm not sure on the MC16 though, as it was slightly different to the later bikes - I believe the ignition unit and servo unit are seperate parts.

Matt? Andy?
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Andy
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Fri Jul 13, 2007 2:30 pm » Post: #4 » Download Post

Yeah, the MC16 (and MC18 Mk1) use a separate RC Valve control box. If the controller fails, it won't render the rest of the ignition useless. Integration of the ECU and RC controller is great as long as the motor is serviced as it should be!

I believe Paul Herr (Wrench) found a motor suitable to use in the later (MC18~) servos, but I can't see the point - unless you really like to tinker and are bored! In the unlikely event a servo does fail, then a good used one is cheap and easy enough to find.
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2-stroke johnny

 
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Fri Jul 13, 2007 2:31 pm » Post: #5 » Download Post

there are 2 ignition units on the '16, located behind the headstock. The servo control unit is seperate and located in the tail just infront of the rear light.

I think that the servo on the '16 runs in the opposite direction to those on later models and from looking in the parts manual it doesn't seem interchangeable. Sad

like alannsr250 says, if it ain't broke don't fix it.
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kabal

 
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Fri Jul 13, 2007 3:15 pm » Post: #6 » Download Post

ahh ok, was wondernig what the box under the pillion was for? So that is just to control the servo?


BTW what is the "box" that is mounted to the left of the subframe, looks sort of like a heatsink?
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Dave Ett
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Fri Jul 13, 2007 3:16 pm » Post: #7 » Download Post

Regulator / rectifyer
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kabal

 
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Fri Jul 13, 2007 3:38 pm » Post: #8 » Download Post

ahh so thats why the battery terminal takes a trip through there, to clean up the signal?
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alannsr250

 
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Fri Jul 13, 2007 4:09 pm » Post: #9 » Download Post

the engine produces ac curent the rectifier turns this into dc current for the battry and regulates the charge rate for the battry.
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