Author Topic: the '750FK'n Mutt'  (Read 24891 times)

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Offline Soulsk8r

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Re: The Mutt is Done!!!
« Reply #50 on: July 03, 2012, 01:54:47 PM »
Very nice!!
Newbie rider, newbie vintage bike owner - Honda CB750K1.

Offline brandEn

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Re: The Mutt is Done!!!
« Reply #51 on: July 03, 2012, 05:17:40 PM »
That looks real nice man. I have really fallen in love with these more streetable machines than the cafe style bikes. Yours looks especially comfy. Who did the seat?

Offline flybox1

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Re: The Mutt is Done!!!
« Reply #52 on: July 05, 2012, 06:13:17 PM »
When I started this, I knew it had to be comfortable for long days.   I liked the stock K8 seat shape, but wanted a little more of a pronounced bump stop, so I lowered the height of the fore-seat, and cut it back a few inches so iwasnt so upright. I took the seat pan to custom upholstery service in lynnwood, and had them shape foam based on a few drawings and pictures I had. I test fitted just the foam for a few days to get the feel and then took it back to be finished. Heavy gray thread accents the tuck n roll.  They did good work. I chose them because they were 5 min from my house, but I probably would go elsewhere next time.
Fell in love with the shape of the NH M bars after sitting on bikerbarts 750 on our Mercer island ride.
As of now, the only alteration I am considering, is rear sets. I'm tall, and my hips feel a litttle cramped after an hour or so....
« Last Edit: July 05, 2012, 08:27:25 PM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline xnoahx

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Re: The Mutt is Done!!!
« Reply #53 on: July 10, 2012, 12:50:24 PM »
Looking really good, I need to touch up my gauges and your paint work looks great

Offline lucky

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Re: The Mutt is Done!!!
« Reply #54 on: July 10, 2012, 01:04:48 PM »
You did some really great work!!
I hoped you checked that accelerator pump cab system and nozzles to make sure they are actually working.

You can check with the engine off. Air box off, and a bright LED flashlight.
Just look into the intake and turn the throttle a couple of times. you should see a squirt of gas from each nozzle.

Offline flybox1

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Re: The Mutt is Done!!!
« Reply #55 on: July 10, 2012, 01:27:20 PM »
You did some really great work!!
I hoped you checked that accelerator pump cab system and nozzles to make sure they are actually working.

You can check with the engine off. Air box off, and a bright LED flashlight.
Just look into the intake and turn the throttle a couple of times. you should see a squirt of gas from each nozzle.
Yep, they all spray nicely.   And adding the restrictors helped. Especially with the spray pressure of #4   Thanks for the specs on those, BTW.  It was a $2+30 minute upgrade  ;D
« Last Edit: July 10, 2012, 01:30:35 PM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline flybox1

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Re: The Mutt Redux
« Reply #56 on: March 05, 2013, 07:42:21 AM »
Took a break from reconstructing the cheap 750F3 engine I picked up to assemble my dual front brake setup on my K8.
I sourced rotors from Godffery, and all the rest of the parts from forum members over the past few months.
I made sure all the small work was done and parts gathered before this point.  All new bolts(bolt depot)/shim washers, calipers and arms painted, new slave pad springs, caliper seals, brake pads, speed bleeders, hard and braided lines, new Master Cylinder, speedo drive plate modified, rotor/hub bolts ground for clearance...everything painted.
First, I mocked up the caliper arms.   Arms only, nothing else.
I only wanted them eyeball close to vertical, and washer shimmed as needed.  Bolts just snug. 
With both sides done, I let out the B-pad adjuster springs so the arms were just inboard of where i thought the rotors would track, and mounted my (tireless)front. 
At this point i could see with a straight edge if my rotor faces matched the caliper arm face, adjusting the B-pad spring and adding washers to shim as needed.
With the caliper piston fully retracted for ease of install, I was able to install the front and back pad housings, and get them tightened with an allen wrench.  Definitely some finger calisthenics there working inside the spokes.
PITA with my fat fingers ::)
From here, I was able to use the B-pad adjustment screw to bring the B-pad into feeler range of the rotor.
As i hadnt hung my front end from the ceiling, i had my wife come out and lay over the back seat so i could spin the front and check for any binding.  I was 1 turn of the adjuster screw on each side off .  pretty pleased i was so close.  fk yeah! ;D
Speed Bleeders and hard lines installed.  Hard lines for both sides needed some gentle persuasion to shape to what I needed.
All in all it took under 2 hours. 
I'm able to easily remove the front rim with the removal of the 2 large caliper bolts and pad housings from each caliper.
Once the mounted tire comes back, I'll get it on and bleed the brakes, one side at a time. 



« Last Edit: March 06, 2013, 11:49:47 AM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline brandEn

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Re: The Mutt Redux - Dual front caliper install
« Reply #57 on: March 05, 2013, 08:05:56 AM »
Good post Rob. Those rotors look great!
I will be doing this soon. What did you have to modify on the speedo drive and where did you get the lines? Can you show a pic of how you routed the lines, where they connect together? I have been wondering about how to go about doing mine.

Offline flybox1

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Re: The Mutt Redux - Dual front caliper install
« Reply #58 on: March 05, 2013, 08:19:21 AM »
Branden,
I had a choice to either modify the speedo drive plate to fit the rotor center, or, modify the rotor carriage to fit the speedo drive plate.  Both are shown in this post.  I chose to modify the speedo drive plate as the wheel I bought off a forum member came with one attached  ;D  The mod took maybe an hour with a dremel and hand files.  A sloppy fit here is desireable so the drive plate doesnt bind.
I must have read these two posts 10 times while sourcing parts to be sure I got all I needed and had the mod process in my  mind. 
http://forums.sohc4.net/index.php?topic=53532.0

http://forums.sohc4.net/index.php?topic=38242.msg493516#msg493516

Godffery offers the rotor carriage mod if you get your rotors through him.

Shawn @ Slingshot Cycles made my lines.  Ordered Wenesday. Came Monday.
Right under my lower triple there is a clip where the brake lines sit. 
i'll run both through there to keep them up and off the tire.
i'm running 2 lines up to the MC.  not a splitter like other bikes.
« Last Edit: March 05, 2013, 06:38:54 PM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline brandEn

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Re: The Mutt Redux - Dual front caliper install
« Reply #59 on: March 05, 2013, 08:22:28 AM »
Thanks ;)

Offline flybox1

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Re: The Mutt Redux - Dual front caliper install
« Reply #60 on: March 11, 2013, 07:50:05 AM »
Moral of the story - Focus on the A-Pad (piston) side of the caliper arm.  Get it flush to the rotor.  The B-pad will pivot as needed.
Be absolutely sure that the face of your caliper arms are square with your rotors.
Your rotors may spin freely upon install, but once you bleed your brakes, you will lock the rotors if the piston side brake pad face does not contact flush. 
Your stationary pad(B-Pad) does have some pivot to it, in all directions, so it can nestle flush against the rotor as it spins.
Your moving (A-pad) pushed by your piston, is not intended to pivot.
Once you bleed your brakes, the A-pad will come into contact with your rotor.  If it touches flush, you're golden, and it will retract as it should.
If an edge touches first, this pressure will force tip the A-pad at an angle in the bore of the caliper, wedging it, thus preventing it from retracting when brake lever is released. 
Mine bound on me once.  Bad enough i could lift the front of the bike without the wheel spinning. 
The combination of releasing pressure from the bleed inserts, and loosening the two 14mm caliper bolts allowed me to press the pistons back in and start again.
Accurately shim the caliper mount brackets before you bleed your brake lines.
Again.  Focus on the A-Pad side of the caliper arm.  Get it flush to the rotor.  The B-pad will pivot as needed.
A long metal contractors square held against the rotor face, and a smaller metal square held against the caliper arm face will allow you to see their differences.

Shim as needed.
Hope this saves someone headaches in the future.

note to self: Tarozzi#22-0037
« Last Edit: June 20, 2014, 07:58:35 AM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline brandEn

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Re: The Mutt Redux - Dual front caliper install
« Reply #61 on: March 11, 2013, 08:13:41 AM »
Good post Rob. I am sorting everything out for my front end now and find your info useful. Couple questions. What pads did you end up with and did you paint your rotors?

Offline flybox1

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Re: The Mutt Redux - Dual front caliper install
« Reply #62 on: March 11, 2013, 08:32:05 AM »
my calipers were off k1's, so i went with new EBC FA12's on both sides, and i haven't decided if on painting the rotor carriers.
I'll leave them as they are until i get the (matte black) F3 motor built and in there. Might change them then.

In the event you're interested, I will be posting a later K caliper in the for sale thread. 
The arm is stock color, but the rest was painted black by my PO, and could use a blast.  no dents or gouges. 
It has the caliper mount bolts on the outboard side, and the thicker caliper arm (between the caliper pad housing sides).
Only about 500 mi on new FA12 pads and new piston seal.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline brandEn

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Re: The Mutt Redux - Dual front caliper install
« Reply #63 on: March 11, 2013, 08:37:58 AM »
Thanks man. I have all my major brake parts already now I'm just getting the details sorted out and working on rebuilding the forks.

Offline flybox1

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Re: The Mutt Redux - Dual front caliper install
« Reply #64 on: May 16, 2013, 08:28:05 PM »
Baby got some bling
Mocked this up before a trip to the welder tomorrow afternoon.
Cone Engineering 18" Quiet Core slip on via DCC.
Great craftsmanship. Baffled,  but fairly open.  Wonderful mellow growl.
No jetting expected.  I was already a little lean in the mid range.
Have a look and listen

https://www.youtube.com/watch?v=0PWJOQac0-c&feature=youtube_gdata_player

Looks close, but my rear shocks are fully extended, and I still have .25" clearance to my swing arm. :P
 
« Last Edit: May 16, 2013, 08:31:45 PM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline flybox1

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Re: The Mutt Redux - NEW Cone Engineering 18" Quiet Core Exhaust
« Reply #65 on: May 17, 2013, 06:19:48 PM »
I Google'd welders in my zip code, and came up with www.performanceweldingservice.com. Basically in my backyard.
After a few emails with Eric, I stopped by today to get my exhaust hanger welded.  I knew I was in the right place when he has his airhead up on the lift working on a sick stainless custom exhaust and a monoshock, and beers brewing in the back.  He encouraged me to ad more support to what I had envisioned, and whipped this bad boy right up.
Thanks Eric, nice work! Welds like a stack of dimes....
« Last Edit: May 21, 2013, 11:30:53 AM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline flybox1

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Re: The Mutt Redux - NEW Cone Engineering 18" Quiet Core Exhaust
« Reply #66 on: May 17, 2013, 07:20:12 PM »
One more...the sound clip is up a few posts if you missed it.

« Last Edit: December 31, 2013, 07:44:33 AM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline SOHC4 Cafe Racer Fan

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Re: The Mutt Redux - NEW Cone Engineering 18" Quiet Core Exhaust
« Reply #67 on: May 17, 2013, 07:32:25 PM »
Quality job!
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline brandEn

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Re: The Mutt Redux - NEW Cone Engineering 18" Quiet Core Exhaust
« Reply #68 on: May 18, 2013, 10:34:53 AM »
Looks great Rob, one of the better looking K7/K8 bikes out there IMO. We need to schedule a ride.

Offline tweakin

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Re: The Mutt Redux - NEW Cone Engineering 18" Quiet Core Exhaust
« Reply #69 on: May 18, 2013, 02:39:37 PM »
Looks great Rob, one of the better looking K7/K8 bikes out there IMO. We need to schedule a ride.

I agree, nice looking bike Rob.  I am out for tomorrow, but we need to ride soon.

Offline flybox1

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Re: The Mutt Part II - Winter '13 Refresh
« Reply #70 on: December 31, 2013, 07:56:15 AM »
I've got this 750F3 engine in a slow rebuild to put into my 750K8.  Since Christmas for 4 kids drains the wallet, I thought i'd dig into the stuff that just takes time....


Temporary lawn ornament


Would have been easier w a helper.


the old K1 engine out, and sold(on Christmas Day) to a local guy, time to start scrubbin'




Ready for black...
« Last Edit: December 31, 2013, 08:41:03 AM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline tweakin

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Re: The Mutt Part II - Winter '13 Refresh
« Reply #71 on: December 31, 2013, 02:34:22 PM »
Making great progress.  Let me know if you need any spares as you move forward, might have what your looking for.

Offline flybox1

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Re: The Mutt Part II - Winter '13 Refresh
« Reply #72 on: December 31, 2013, 03:02:45 PM »
Making great progress.  Let me know if you need any spares as you move forward, might have what your looking for.
Very generous of you, tweakin. I'll let you know if i come across anything. 
Did you need a new advancer shaft for your build, or reuse your OEM?  The one on my F3 came with a bent tip. 
I think this is the only part I'm having trouble finding.  30231-300-010
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline tweakin

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Re: The Mutt Part II - Winter '13 Refresh
« Reply #73 on: December 31, 2013, 03:07:48 PM »
Might have one, let me do some digging.
Making great progress.  Let me know if you need any spares as you move forward, might have what your looking for.
Very generous of you, tweakin. I'll let you know if i come across anything. 
Did you need a new advancer shaft for your build, or reuse your OEM?  The one on my F3 came with a bent tip. 
I think this is the only part I'm having trouble finding.  30231-300-010

Offline tweakin

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Re: The Mutt Part II - Winter '13 Refresh
« Reply #74 on: December 31, 2013, 03:33:52 PM »
I found one but unfortunately my spare is also bent...  sorry, guess I should have been more careful when digging into one of my spare engines recently.