Author Topic: '86 700 Nighthawk S, what to do?  (Read 1236 times)

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Offline paxtonpony

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'86 700 Nighthawk S, what to do?
« on: March 31, 2007, 09:28:51 PM »
My friend just bought a 700 Nighthawk S for $100.  Not too bad but a little rough.  Hasn't been started in 2 years.  What would you suggest we do to the engine before we start it since it hasn't been running in 2 years.  Keep in mind, we live on the coast so the corrosion is really bad here.

He kind of bought this at my insistance.  I had been looking for one but never found anything in my price range.  Hoping this works out for him.  If not, we can part it out for the price he paid.

Thanks in advance!
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Offline TwoTired

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Re: '86 700 Nighthawk S, what to do?
« Reply #1 on: April 02, 2007, 10:36:40 PM »
Remove the drain screw from each carb in turn and examine the drainage.  Is there hope?
Get some spray carb cleaner, and squirt into the drain hole.  Stop when it drains out clear.

Apply vacuum (I use my mouth if not in rage of my mity vac) to the fuel petcock to allow the fresh gas you just put in the tank to flush out the carb bowl until it runs clear. Replace the bowl drain screw.

Do each of the remaining carbs in the same way.  Don't forget to apply vacuum to the petcock to get all the carb bowls full of fuel.

Check the oil supply.

I'd probably pull the plugs to see if they are likely to fire.

You'll need a good battery.  Apply full choke and crank it till is starts.  Don't overheat the starter motor.  30 seconds on, 2 minutes off.

Cheers,
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

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