Author Topic: Leaky pulse generator cover- Nighthawk 750  (Read 890 times)

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Offline DustyRags

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Leaky pulse generator cover- Nighthawk 750
« on: July 03, 2014, 11:53:21 AM »
Hey folks,

I've slipped to the dark side, and I'm running a DOHC these days- 2000 Nighthawk 750 (last of the CB750s).

Unfortunately, I've also slipped on some ice, and scraped up the pulse generator cover (left side engine case cover, what you'd call the points on a SOHC) at about 15 mph. It started leaking a bit, so I popped it off, replaced the gasket, and torqued all 4 bolts to the requisite 7.5 ft/lbs.

It's still leaking :(

Anybody know anything about these guys? Does it require/is it safe to use gaskaseal or something? There's effectively no info in the manual.

Any help is appreciated! The slip also busted my kick stand cutout switch (which I, erm, cut out and taped up), and finally blew a fork seal (fixed that mid-trip in Portland). The leak is following me, though. :(
1976 CB550K- sold
2005 Kawasaki Vulcan 500- sold
2000 CB750 Nighthawk - sold
1975 XL350 - crashed
2004 Suzuki Vstrom 650 - sold

Offline RJ CB450

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Re: Leaky pulse generator cover- Nighthawk 750
« Reply #1 on: July 03, 2014, 03:59:25 PM »
My nighthawk is about 18 years newer, so cannot comment too much.  But the pulse generator should be dry and not leaking anything.  you have a leaking crank seal it sounds like?  The gasket is meant for keeping dust and water out unless is somethign different done there...
74 CB450 K7 Supersport, 82 CB650sc Nighthawk, 1982 CBX 1000, 2015 Tiger XCx.... And some ol minibike with a 5hp Briggs.

Offline DustyRags

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Re: Leaky pulse generator cover- Nighthawk 750
« Reply #2 on: July 04, 2014, 02:34:19 AM »
18 years newer? a 2018? :P

The only documentation I could find on that was from a guy who was trying to check his timing, and found it full of oil. Guess his could have gone out too...

EDIT: Nope, at least one entry on another forum says that's normal- the pulse generator has oil splashing about in it. OK, will figure out later, it's 2:40 am right now, time to crash. Thanks for the response, I'll keep poking at it as time permits!
« Last Edit: July 04, 2014, 02:41:01 AM by DustyRags »
1976 CB550K- sold
2005 Kawasaki Vulcan 500- sold
2000 CB750 Nighthawk - sold
1975 XL350 - crashed
2004 Suzuki Vstrom 650 - sold