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Old 03-31-2013, 05:15 PM   #3616
The Kurgan
Firing on one cylinder
 
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Joined: Nov 2007
Location: North of 49, in a place called The Hammer
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Quote:
Originally Posted by genespleen View Post
Anyone else run into this problem?

Today, when riding into a pretty fair headwind (say 18-20 mph) at about 60-65 mph, my carbs occasionally seemed to starve for air when the wind gusted. I could feel the engine bogging down temporarily (not a good thing in the middle of a curve, by the way). This problem continued as long as I was heading in that direction.

Once I turned on to a road heading in a different direction, the problem disappeared right away, and stayed away all the way home. I can only surmise that the combination of the wind speed/direction and our intake snorkel ('85 NH 650) was not a happy mix.
The first I have heard of it, and I've been riding since 1987... though I never owned a NH6.5. I'm sure others will chime in.
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Old 04-01-2013, 05:21 AM   #3617
Tourniquet
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Location: NYC
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Quote:
Originally Posted by genespleen View Post
Anyone else run into this problem?

Today, when riding into a pretty fair headwind (say 18-20 mph) at about 60-65 mph, my carbs occasionally seemed to starve for air when the wind gusted. I could feel the engine bogging down temporarily (not a good thing in the middle of a curve, by the way). This problem continued as long as I was heading in that direction.

Once I turned on to a road heading in a different direction, the problem disappeared right away, and stayed away all the way home. I can only surmise that the combination of the wind speed/direction and our intake snorkel ('85 NH 650) was not a happy mix.
It seems interesting that this happened at a headwind. so about 60 mph with a 15 - 20 mph headwind means the bike was experiencing ~80 mph winds. Maybe take it up to 80 and see if anything happens. This could be a fun one to troubleshoot...
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Old 04-01-2013, 05:34 AM   #3618
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Skierd, I dig the combo of supermoto and nighthawk.

I usually take the SM when Im feeling frisky (since Im not afraid to drop it), and the NH if Im gonna go for more than an hour. Works out pretty frickn good.

Although I sure wouldnt mind a spare 700s....
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Old 04-01-2013, 06:11 PM   #3619
genespleen
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Location: mid-Missouri
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Quote:
Originally Posted by Tourniquet View Post
It seems interesting that this happened at a headwind. so about 60 mph with a 15 - 20 mph headwind means the bike was experiencing ~80 mph winds. Maybe take it up to 80 and see if anything happens. This could be a fun one to troubleshoot...
g

No worries at 80 mph in normal conditions. I do think this had more to do with gusts creating odd flow patterns around the intake snorkel. I have heard of this type of thing w/regard to motorbikes in general. Just had never experienced it myself...
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Old 04-02-2013, 04:37 PM   #3620
draco_1967
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Quote:
Originally Posted by genespleen View Post
g

No worries at 80 mph in normal conditions. I do think this had more to do with gusts creating odd flow patterns around the intake snorkel. I have heard of this type of thing w/regard to motorbikes in general. Just had never experienced it myself...
On my 750, if I had both feet forward on my highway pegs, I would get that effect of the engine "gasping" for air. If I put one leg back on the footpegs it would go away.
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Old 04-03-2013, 12:53 AM   #3621
rride
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http://www.motad.co.uk/product.php?p...+F2N-F22+Retro

Check these SS 4 to 1 headers out, and from real exhaust engineers (a black art). The only thing would be to get them from another Euro country except UK since 100% tax anything shipped. I found a couple more SS alternatives, but these guys may be able to stamp db limits on the pipes that would satisfy CA EPA stamp requirement. UK really has some nice job shop vendors, but the 100% UK tax man (to USA ONLY) can bite my #$%&.


And look at these dudes (from where else, UK) 4 into 1 (50% more cost) and look at the FLAT 4 into 1 transition for maximum vertical (speed bump) ground clearance. BUT they are chromed and not Grade 304 (!) SS, boo!

http://www.wemoto.com/bikes/honda/cb...mplete_system/



Life is looking better, but I want the 20 year plus SS exhaust. That cleaning chrome exhaust pipes is for the birds, especially when rain comes down upswept pipes and I can't cover hot pipes with my cover. I was spoiled with BMW F650 ST which had SS no maintenance pipes. Chromed (only) pipes is a mob racket (CA DMV and OEM dealers)!

rride screwed with this post 04-03-2013 at 03:48 PM
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Old 04-03-2013, 12:11 PM   #3622
jimmycorp
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Question Nighthawk S Forks Air Valve Issue

Nighthawk S Forks Air Valve Issue


Hello all,

My name is Jimmy I'm 31 and from NYC. I picked up this NHS this past Christmas and am just getting her ready for the road. For some odd reason, the previous owner had a schrader valve extension of sorts on the air forks valve near the handlebars. I spanned off one of these extensions and have no air in my left fork now. I tried loosening the nut thinking i could slap on a standard Schrader valve, but the nut won't budge. I've tried WD40, liquid wrench, and a breaker bar. I'd like to pick your brains before I brute force this thing off.

Another idea i had was to just replace the valve core on the left side, but this would still leave that extension on the right fork.

Anyone ever seen anything like this before? Pics to follow


all loaded up for the 100 mile trip home

Pics taken by Previous owner





Standard Nighthawk dash and air fork valves.

Unfortunately my phone died so I couldnt take a pic of mine, I will upload tomorrow, but just for reference, this is what is has instead.


extended Schrader valve for water,


Valve core that popped out


For size reference

Anyone ever seen this on a bike, or have any ideas? I really want to get her on the road already. Any thoughts or ideas are greatly appreciated. Thank you in advance.

--Jimmy
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Old 04-03-2013, 01:26 PM   #3623
bisbonian
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Does this just screw into the top of the fork? One on each side?

I don't think I'm any help but it appears that Bike Bandit might show this but state it's unable to ship.

They're calling it a bolt assembly and their diagram is horrid but it looks like it could be the whole assembly, I don't see any valve stems but I was also guessing on the year and just picked 1984.

Retail shows at $60 each, have you checked with the local Honda dealer?
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Old 04-03-2013, 03:20 PM   #3624
The Kurgan
Firing on one cylinder
 
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Location: North of 49, in a place called The Hammer
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At 242 Pages, perhaps the mods can allow for a NEW "Official Nighthawk Thread -- 2013+" ? Having said that, there seems to be a trend with super long threads here.
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Old 04-04-2013, 01:33 PM   #3625
skierd
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Looking to install a set of heated grips on my '98. Is there a preferred circuit to pull the power off of, or do most of you who have heated grips run them off of a dedicated circuit?

For example, on my WR250R, I used the headlight circuit as it has 15amp capacity and uses about half that, leaving plenty of overhead for the grips.

Also, any recommended front brake pads? The originals are getting pretty thin. OE? EBC?
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Old 04-04-2013, 01:57 PM   #3626
RobbieAG
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Quote:
Originally Posted by skierd View Post
Looking to install a set of heated grips on my '98. Is there a preferred circuit to pull the power off of, or do most of you who have heated grips run them off of a dedicated circuit?

Also, any recommended front brake pads? The originals are getting pretty thin. OE? EBC?
I would run a dedicated fused circuit off the battery with a relay run from a switched circuit. I ran a relay for a power input off the taillight circuit which is accessible under the seat. You can check out a thread here (Lots of great help and info available at nighthawk-forums.com). For the brakes, most use OEM, but I've heard the EBCs are good too.
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Old 04-04-2013, 08:36 PM   #3627
rride
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On a thump with constant vibration, heated grips are needed therapeutically. But on the NH 750 because it is so much smoother, it would fall way down the priority list of additions in So Cal, anyway. ymmv
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Old 04-05-2013, 06:05 PM   #3628
skierd
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My WR is just about as smooth as the Nighthawk, so no therapy needed there. And I live in Alaska, not the people's republic of Kalifornistan, so heated grips are a very nice thing to have.
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Old 04-05-2013, 06:14 PM   #3629
The Kurgan
Firing on one cylinder
 
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Location: North of 49, in a place called The Hammer
Oddometer: 349
Heated grips are nice thing to have here in Canada as well, as they extend the riding season! My last ride, a BMW K1200RS, had both a heated seat and grips, and I felt really pampered. I might add heated grips to my NH towards the end of the season.
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2003 Suzuki SV1000S, 1975 Honda CB500T (two of them)
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Old 04-05-2013, 11:45 PM   #3630
rride
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I stand corrected and can see how that would bump heated grips up in the priorities.

At least you are not in a state with 45% of US population and everywhere is like a parking lot every which way you turn. Compared to the Appalachians, the roads are not that hot with constant road work as well.

It also has about 45% of USA manufacturing which I will get back into as a consulting job eventually. Coming from FL last, its a blessing!
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