Restoring a 84 Honda Nighthawk 700s to "Better than new" condition. - Wrist Twisters
 
Thread Tools Display Modes
post #1 of 36 Old 03-04-2012, 06:16 PM Thread Starter
Tirone
 
project84cafe's Avatar
 
Join Date: Feb 2012
Posts: 29
Rep Power: 1
 
Restoring a 84 Honda Nighthawk 700s to "Better than new" condition.

I once posted that I wanted to turn my 84 CB700S to a cafe racer. After much deliberation and counting my pennies I have swayed from the cafe and decided to go stock with a couple of modern updates. I am currently in the disassemble process with the motor, want to replace all gaskets, seals, o-rings and any thing else I can possibly find that's in-need of replacement. Like to repaint the frame and rims along with the springs just a flat or gloss black to bring it back to life. Was toying with the idea of the Honda blue color instead but don't have the funds to do it right. After I reassemble everything I'd like to take a road trip some where probably go to Oklahoma and and back.
I guess what I'm trying to get at is I could use some good advice from anyone with experience in rebuilding motors and even restoration work. I have my buddy helping me and his knowledge is limited so I need advice for what to look for in the disassembling process of the motor and what to look for (just the bad) and any tips on taking the motor apart.

ForumRunner_20120304_201306.jpg



ForumRunner_20120304_201145.jpg



ForumRunner_20120304_201458.jpg

project84cafe is offline  
Sponsored Links
Advertisement
 
post #2 of 36 Old 03-04-2012, 07:35 PM
919 aka Hornet 900
 
Mr T81's Avatar
 
Join Date: Aug 2009
Location: Edmonton, Canada
Posts: 998
Rep Power: 1
 
How many miles on the motor? Any noise, smoke, leaks?
I would start with cleaning all the parts and see what needs paint
or replacement.

Mr T81 is offline  
post #3 of 36 Old 03-04-2012, 07:46 PM
Chief 10 Beers
 
wgrady's Avatar
 
Join Date: May 2011
Location: Duncan, OK
Posts: 169
Rep Power: 1
 
That bike will soon be 20 years old. If it were me I would try and restore to as close to original as possible. I think it would be most appreciated in that way. If the engine was not abused I would think it would be in decent condition. If I am not mistaking that engine had hydraulic valves and was a very solid design? There may have been a seal problem with that model but I do not recall the details?

My 2 cents

There are bold motorcyclists and old motorcyclists, but (OK) there are few old bold motorcyclists
wgrady is offline  
post #4 of 36 Old 03-04-2012, 08:10 PM
Batman
 
velodesign's Avatar
 
Join Date: Feb 2010
Location: Fargo
Posts: 1,053
Blog Entries: 3
Rep Power: 1
 
My advice? doing a restoration doesn't mean make it look pretty, its making it last, but at the same time, make it how you WANT it to last. Paint colors will come and go in your brain, focus on the motor, and focus on the brakes, and focus on the suspension+tires...

One thing for sure if you were in the same boat as me, and that's called 'BUDGET PRIORITY' is don't count on hitting your date. Plan on running into a few hidden hickups, and plan on setting a firm budget and watch it carefully. And if you love to ride I hope you have another bike to do so while you wrench on this, otherwise, its kinda like torture.

I tore into everything on my 1980kz 12 years ago, wasn't that bad. But take that same mentality for my cb750 cafe fighter i was doing just 3 years ago, you run into new parts that simply don't exist any more! Need a new stator? Good luck! Aftermarkets sucked and oem was like a second mortgage shipped from China...

I guess, what I'm trying to say is:
Restore because you love it, or you want something to do and learn. Don't restore if it doesn't mean anything and you just want to ride. A cheap bike that doesn't do it for you and doesn't run...doesn't help you.

And get a good torque wrench, snapping a head bolt twice after port and polish, hot cams, suns ignition, big bore and cr29s...just ruins the party. Ask me how I know :-(

I may not have a lot to say but it doesn't mean I don't listen.
velodesign is offline  
post #5 of 36 Old 03-04-2012, 09:10 PM Thread Starter
Tirone
 
project84cafe's Avatar
 
Join Date: Feb 2012
Posts: 29
Rep Power: 1
 
Quote:
Originally Posted by Mr T81
How many miles on the motor? Any noise, smoke, leaks?
I would start with cleaning all the parts and see what needs paint
or replacement.
It has oil leaks coming from the top half . It has close to 30k on it no smoke, running alittle rich on two and three. So Im thinking i need to just adjust my carbs may be sync them while I'm at it.

project84cafe is offline  
post #6 of 36 Old 03-04-2012, 09:35 PM Thread Starter
Tirone
 
project84cafe's Avatar
 
Join Date: Feb 2012
Posts: 29
Rep Power: 1
 
I have the passion in my heart to see this bike back to original. Right now the weather has been bipolar so missing riding hasn't really hurt much. I am trying my best to do everything right the first time so I don't have a repeat. Is there a way to take the motor apart without having take the valves all apart.

project84cafe is offline  
post #7 of 36 Old 03-13-2012, 07:40 PM
Tesserarius
 
PHOBMAN's Avatar
 
Join Date: Jun 2006
Location: SOUTHERN CALIFORNIA
Posts: 786
Rep Power: 1
 
I'm on my second restoration now, a '79 CBX and it's a matter of taking it apart and cleaning, buffing, polishing, painting every part before hanging it back on the bike. This does not have to be expensive, rattle can paints have come a long way, their epoxy paints are outstanding for durability a gloss, polishes are good and EBAY is great. All you need is patience and courage!
Attached Images
File Type: jpg 007.jpg (196.8 KB, 24 views)
File Type: jpg 008.jpg (155.0 KB, 19 views)

PHOBMAN is offline  
post #8 of 36 Old 03-13-2012, 07:43 PM
Hastatus Prior
 
TheBeeDeeGee's Avatar
 
Join Date: Sep 2011
Location: Mobile
Posts: 1,570
Rep Power: 1
 
^^^can't wait to see this!

"A motorcycle is not just a two-wheeled car; the difference between driving a car and climbing onto a motorcycle is the difference between watching TV and actually living your life."
-2005 CBR 600 F4i
-2001 RC51 ** SOLD
-2002 VFR 800**SOLD
-2002 919 **SOLD
-2006 599 ** WRECKED
TheBeeDeeGee is offline  
post #9 of 36 Old 03-13-2012, 07:49 PM
The Cripple
 
Pvster's Avatar
 
Join Date: Nov 2009
Location: Phoenix
Posts: 8,764
Rep Power: 1
 
that engine is way to damn clean! you could eat off of it! how do you get it that clean?

Pvster is offline  
post #10 of 36 Old 03-14-2012, 08:07 PM
Tesserarius
 
PHOBMAN's Avatar
 
Join Date: Jun 2006
Location: SOUTHERN CALIFORNIA
Posts: 786
Rep Power: 1
 
Paint and polish!

PHOBMAN is offline  
post #11 of 36 Old 03-15-2012, 05:48 AM
Aquilifer
 
Rich Jura's Avatar
 
Join Date: Jul 2007
Location: SW Michigan
Posts: 1,217
Rep Power: 1
 
Quote:
Originally Posted by PHOBMAN View Post
I'm on my second restoration now, a '79 CBX and it's a matter of taking it apart and cleaning, buffing, polishing, painting every part before hanging it back on the bike. This does not have to be expensive, rattle can paints have come a long way, their epoxy paints are outstanding for durability a gloss, polishes are good and EBAY is great. All you need is patience and courage!
CBX produces the most astounding sound of any bike I've heard, I remember the first one that came in at the Honda shop I was working at, I was made weak kneed. Green with envy ;-)
Rich

Rich Jura is offline  
post #12 of 36 Old 03-15-2012, 01:46 PM Thread Starter
Tirone
 
project84cafe's Avatar
 
Join Date: Feb 2012
Posts: 29
Rep Power: 1
 
Well Im taking off my oil pan remove the oil lines and noticed some metal pieces stuck to the cover then look at the oil strainer and see a bunch more. I rode this bike over 50miles home and only problems I had where oil leak, strong smell off fuel or a mixture of oil and fuel coming from exhaust and bike wouldn't accelerate to more then 65 - 70 with limitations (I.e. hills, traffic ) ran through all gears up and down never missed a beat. was alittle "sensitive " when I tried to put some force into the throttle. Acted like it losed its top end power .
Attached Images
File Type: jpg ForumRunner_20120315_154003.jpg (40.3 KB, 27 views)

project84cafe is offline  
post #13 of 36 Old 03-15-2012, 02:10 PM
Why's everything on fire?
 
CB700S's Avatar
 
Join Date: Mar 2011
Location: Dallas
Posts: 2,258
Rep Power: 1
 
Garage
Looks like you lost a bearing. Overhaul time.

1986 Honda Nighthawk 700S
2002 Honda 919
CB700S is offline  
post #14 of 36 Old 03-15-2012, 02:41 PM Thread Starter
Tirone
 
project84cafe's Avatar
 
Join Date: Feb 2012
Posts: 29
Rep Power: 1
 
Quote:
Originally Posted by CB700S
Looks like you lost a bearing. Overhaul time.
I'm no professional mechanic so could I get away with just taking the crank case apart. I've read my Bible (shop repair manual ) 26 bolts that I have to remove - is the extent of my knowledge so I'm good as lost when I get it open!?!? I added a picture.
Attached Images
File Type: jpg ForumRunner_20120315_164010.jpg (51.9 KB, 29 views)

project84cafe is offline  
post #15 of 36 Old 03-15-2012, 03:33 PM
Why's everything on fire?
 
CB700S's Avatar
 
Join Date: Mar 2011
Location: Dallas
Posts: 2,258
Rep Power: 1
 
Garage
In order to take the crank case apart and get all the shrapnel out, then replace the bearing you have to take the head and cylinders off. So, no.

Same deal for the next most likely failure, the chain tensioner.

1986 Honda Nighthawk 700S
2002 Honda 919
CB700S is offline  
post #16 of 36 Old 03-15-2012, 03:50 PM
The 919 project continues
 
mdtoney's Avatar
 
Join Date: Sep 2006
Location: Seattle, WA
Posts: 2,427
Rep Power: 1
 

Awards Showcase
Donation Veteran 
Total Awards: 2

Quote:
Originally Posted by project84cafe View Post
I've read my Bible (shop repair manual )
I would start at the top and tear the motor down, to see what condition all the parts are in.
It'll be a project, but at least you have the service manual to refer to.
Good luck!

mdtoney is offline  
post #17 of 36 Old 03-15-2012, 04:26 PM Thread Starter
Tirone
 
project84cafe's Avatar
 
Join Date: Feb 2012
Posts: 29
Rep Power: 1
 
Quote:
Originally Posted by mdtoney

I would start at the top and tear the motor down, to see what condition all the parts are in.
It'll be a project, but at least you have the service manual to refer to.
Good luck!
Ive scoped the inside of the motor gears and all look good no damage. I have went through every part of the crankcase and can not find anything missing damaged or other wise off. I am completely baffled by this Unidentified object. My gear tolerance and measurements all check and just checked crankshaft , clutch assembly. I think it may be something to do with my transmission since that is the only thing I haven't opened up and looked see.

project84cafe is offline  
post #18 of 36 Old 03-15-2012, 05:06 PM
Batman
 
velodesign's Avatar
 
Join Date: Feb 2010
Location: Fargo
Posts: 1,053
Blog Entries: 3
Rep Power: 1
 
How is your electrical/coils? The stutter in acceleration is reminiscint of bad ignition which could be unburnt fuel passing.

I may not have a lot to say but it doesn't mean I don't listen.
velodesign is offline  
post #19 of 36 Old 03-15-2012, 06:25 PM
Tesserarius
 
PHOBMAN's Avatar
 
Join Date: Jun 2006
Location: SOUTHERN CALIFORNIA
Posts: 786
Rep Power: 1
 
If the engine splits horizontally like the cbx, you probably can take the bottom half off without removing the head and barrells and get direct access to the bottom end and gearbox, the manual is usually very good in describing the proceedures. You don't have to be a good mechanic, you only have to have courage, and be prepared to learn! If it's made by man, it can be repaired by man!
Attached Images
File Type: jpg CBX 050.jpg (166.4 KB, 16 views)

PHOBMAN is offline  
post #20 of 36 Old 03-15-2012, 07:31 PM
Why's everything on fire?
 
CB700S's Avatar
 
Join Date: Mar 2011
Location: Dallas
Posts: 2,258
Rep Power: 1
 
Garage
Phob, on the 700 the engine isn't a stressed member. It has a full double cradle frame and the engine sits in the cradles. Sadly, a lot of these 700s got scrapped because if the tensioner or chain goes, the labor to dismantle the engine and fix the problem is a lot more than the bike is worth.

1986 Honda Nighthawk 700S
2002 Honda 919
CB700S is offline  
post #21 of 36 Old 03-16-2012, 03:54 AM
Aquilifer
 
Rich Jura's Avatar
 
Join Date: Jul 2007
Location: SW Michigan
Posts: 1,217
Rep Power: 1
 
Quote:
Originally Posted by PHOBMAN View Post
If it's made by man, it can be repaired by man!
In my late teens the advice I was given once was " all any machine is, is a mechanical jigsaw puzzle. As long as you don't pound, file, grind or mutilate any parts you should be able to dismantle and assemble any machine."

Rich

Rich Jura is offline  
post #22 of 36 Old 03-17-2012, 01:47 PM
blur
 
drewvir's Avatar
 
Join Date: Feb 2009
Location: Deptford,NJ
Posts: 1,372
Rep Power: 1
 

Awards Showcase
Donation 
Total Awards: 1

Quote:
Originally Posted by wgrady View Post
That bike will soon be 20 years old.
My 2 cents

not a math major,huh?

bikes a 1984, the current year is 2012.......... just messin' with ya man.

'04 Honda 919, Candy apple red met., 17/44t sprockets,f-16 windscreen,delkevic ss exhaust,Tharbars,givi engine bars, billet alum. led turns w/ running lights,red adj.levers from china, bar end mirrors,grip heaters,adj. foot peg brackets,adj. bar risers,dunlop Q2(that are better than your pp 2ct,lol)bike wired for gps and phone charger
drewvir is offline  
post #23 of 36 Old 03-21-2012, 11:23 PM
Milites Gregarius
 
Shreddin Rubber's Avatar
 
Join Date: Feb 2012
Posts: 111
Rep Power: 1
 
Quote:
Originally Posted by velodesign
How is your electrical/coils? The stutter in acceleration is reminiscint of bad ignition which could be unburnt fuel passing.
My girl has the 450 twin version of this bike. Just today I removed the air cleaner to see why there was a slight hesitation from 2000-4000 rpms.
Turned out to be gummed up along with everything else on the air intake. Nothing a can of seafoam couldn't handle.
The 450 is great bike for my old lady to cut her teeth on.

Shreddin Rubber is offline  
post #24 of 36 Old 03-23-2012, 07:54 PM
Tesserarius
 
PHOBMAN's Avatar
 
Join Date: Jun 2006
Location: SOUTHERN CALIFORNIA
Posts: 786
Rep Power: 1
 
What the hell is Seafoam?

PHOBMAN is offline  
post #25 of 36 Old 03-23-2012, 11:43 PM
blur
 
drewvir's Avatar
 
Join Date: Feb 2009
Location: Deptford,NJ
Posts: 1,372
Rep Power: 1
 

Awards Showcase
Donation 
Total Awards: 1

Sea Foam | Motor Treatment | General Content - Motor Treatment

this stuff is amazing

'04 Honda 919, Candy apple red met., 17/44t sprockets,f-16 windscreen,delkevic ss exhaust,Tharbars,givi engine bars, billet alum. led turns w/ running lights,red adj.levers from china, bar end mirrors,grip heaters,adj. foot peg brackets,adj. bar risers,dunlop Q2(that are better than your pp 2ct,lol)bike wired for gps and phone charger
drewvir is offline  
post #26 of 36 Old 03-25-2012, 11:46 AM
Milites Gregarius
 
Shreddin Rubber's Avatar
 
Join Date: Feb 2012
Posts: 111
Rep Power: 1
 
Quote:
Originally Posted by Shreddin Rubber

My girl has the 450 twin version of this bike. Just today I removed the air cleaner to see why there was a slight hesitation from 2000-4000 rpms.
Turned out to be gummed up along with everything else on the air intake. Nothing a can of seafoam couldn't handle.
The 450 is great bike for my old lady to cut her teeth on.
Seafoam worked. Bike almost pulls the front tire now. Half a can in the gas and about 1/4 can of the spray in the carb and the bike is running like new.

Shreddin Rubber is offline  
post #27 of 36 Old 03-25-2012, 02:27 PM
blur
 
drewvir's Avatar
 
Join Date: Feb 2009
Location: Deptford,NJ
Posts: 1,372
Rep Power: 1
 

Awards Showcase
Donation 
Total Awards: 1

that stuff is the shit!!

'04 Honda 919, Candy apple red met., 17/44t sprockets,f-16 windscreen,delkevic ss exhaust,Tharbars,givi engine bars, billet alum. led turns w/ running lights,red adj.levers from china, bar end mirrors,grip heaters,adj. foot peg brackets,adj. bar risers,dunlop Q2(that are better than your pp 2ct,lol)bike wired for gps and phone charger
drewvir is offline  
post #28 of 36 Old 03-25-2012, 08:30 PM
Community Moderator
 
g00gl3it's Avatar
 
Join Date: Jun 2009
Location: Idaho
Posts: 11,613
Rep Power: 1
  

Awards Showcase
Wrist Twisters Event Attendance Wrist Twisters Event Attendance Wrist Twisters Event Attendance 
Total Awards: 3

I took out my spark plug out of my weed wacker and threw it in a little cup with some seafoam (be careful which type of plastic you use, it will eat some types of plastic). It came out crystal clear 30 minutes later, all that gunk had just dissolved or fallen off.

Love this stuff. If you want to freak out your neighbors, suck some up the intake manifold (use the vacuum lines) on your car. Cleans the injectors but man, does it smoke!

2009 Aprilia Tuono - Ginger
2001 XR650R BRP (Big Red Pig)
2006 Honda 599 - Ex wrecked it :-D
2007 Honda CB900F (sold)
2006 Honda VTX 1300C (sold)
YouTube Channel
g00gl3it is offline  
post #29 of 36 Old 03-27-2012, 01:53 AM
Tirone
 
Hornetrider05's Avatar
 
Join Date: Mar 2012
Posts: 29
Rep Power: 1
 
Be cautious using seafoam its good stuff i kno but if u run 94 octane or higher engine temp can climb really fast

ForumRunner_20120327_045255.jpg

Hornetrider05 is offline  
post #30 of 36 Old 03-27-2012, 01:56 AM
Tirone
 
Hornetrider05's Avatar
 
Join Date: Mar 2012
Posts: 29
Rep Power: 1
 
I ran seafoam in my 05 919 it only has 8000kms on it i put a new set of yosh exhaust and ran 94 the combination of the two made the exhaust hotter than usual thus blueing my new pipes

Hornetrider05 is offline  
post #31 of 36 Old 03-27-2012, 04:19 AM
Tirone Choolaces
 
marylandmike's Avatar
 
Join Date: Aug 2007
Location: USA
Posts: 11,122
Rep Power: 1
 
Garage

Awards Showcase
Wrist Twisters Event Attendance Donation Donation 
Total Awards: 3

Quote:
Originally Posted by Hornetrider05 View Post
I ran seafoam in my 05 919 it only has 8000kms on it i put a new set of yosh exhaust and ran 94 the combination of the two made the exhaust hotter than usual thus blueing my new pipes
How much did you use in a tank full?

marylandmike is offline  
post #32 of 36 Old 03-27-2012, 07:11 AM
Milites Gregarius
 
Shreddin Rubber's Avatar
 
Join Date: Feb 2012
Posts: 111
Rep Power: 1
 
Quote:
Originally Posted by marylandmike

How much did you use in a tank full?
No more than 1/4 can.

Shreddin Rubber is offline  
post #33 of 36 Old 03-27-2012, 07:16 AM
Tirone
 
Hornetrider05's Avatar
 
Join Date: Mar 2012
Posts: 29
Rep Power: 1
 
It was about 1/4 can, maby a little less in a full tank of ultra 94 i drained it gave it to my dad he ran it all in his V-star i put super 90 back in no seafoam

Hornetrider05 is offline  
post #34 of 36 Old 03-27-2012, 07:19 AM
Tirone
 
Hornetrider05's Avatar
 
Join Date: Mar 2012
Posts: 29
Rep Power: 1
 
Seafoam may not had been the cause of my pipes blueing

Hornetrider05 is offline  
post #35 of 36 Old 03-27-2012, 10:00 AM
Milites Gregarius
 
Shreddin Rubber's Avatar
 
Join Date: Feb 2012
Posts: 111
Rep Power: 1
 
Quote:
Originally Posted by Hornetrider05
Seafoam may not had been the cause of my pipes blueing
Seafoam won't cause it. Heat and running lean will though

Shreddin Rubber is offline  
post #36 of 36 Old 03-27-2012, 01:26 PM
blur
 
drewvir's Avatar
 
Join Date: Feb 2009
Location: Deptford,NJ
Posts: 1,372
Rep Power: 1
 

Awards Showcase
Donation 
Total Awards: 1

ur pipes are stainless,when they get hot(rich or lean) they turn gold then blue

the flash point for seafoam is much higher than gas

seafoam.....55deg
gas...........-45degf

the higher the flash the harder it is to ignite

'04 Honda 919, Candy apple red met., 17/44t sprockets,f-16 windscreen,delkevic ss exhaust,Tharbars,givi engine bars, billet alum. led turns w/ running lights,red adj.levers from china, bar end mirrors,grip heaters,adj. foot peg brackets,adj. bar risers,dunlop Q2(that are better than your pp 2ct,lol)bike wired for gps and phone charger
drewvir is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Wrist Twisters forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome