CB1100F - long time coming...

Discussion in 'Some Assembly Required' started by shinyribs, Jun 17, 2018.

  1. shinyribs

    shinyribs doesn't care

    Joined:
    Sep 24, 2011
    Oddometer:
    2,410
    Location:
    The South
    I bought this bike 4 years ago. Titled, 90% complete, but not running. Directly after buying this thing the family business had a rough couple of years and I got married and moved to a new house. I've been busy. Finally off the back burner, I drug the Mighty 1100 over to my new shop this afternoon.

    The day I brought it home. Not a bad starting point, and the Yoshi exhaust is old school cool. I have no idea what the shocks are off of, but the wiring harness is completely untouched. That's a big plus in my book. I have ran a compression test and took a look under the valve cover and all seems well.
    [​IMG]
    This morning I picked up the bodywork that a buddy painted for me ( talk about getting the cart before the horse), so I hung it on the bike for some motivation.

    [​IMG]

    I've got some parts to choose from, but not entirely sure what direction I'm taking the bike yet. F2 arm and skinny 3 spokes with twin shocks? CBR600 arm with gorgeous 6 spokes and go monoshock? Custom yokes to utilize the ridiculously short GSXR shocks? I dunno...

    [​IMG]

    I do know this. A buddy whipped up this photoshop of what I could have if I ever get cracking. :raabia


    cb11f_b4c2.jpg

    cb11f_b4.jpg

    I currently have a XL500S project that I'm focusing my attention on, but I'll be squeezing in some busywork on this bike when things on the XL project are stalled. In the meantime, anyone know of any modern forks that actually have some length to them??? I hear Yamaha forks are typically pretty long...
    #1
    fireflyr likes this.
  2. Wildebeest90210

    Wildebeest90210 Long timer

    Joined:
    May 24, 2013
    Oddometer:
    2,112
    Conventional R6 forks, 43mm, fully adjustable, upgrade with an fazer 1000 progressive spring, 750mm centre axle to top. Excellent fork, easy to find and cheap.
    #2
    shinyribs likes this.
  3. shinyribs

    shinyribs doesn't care

    Joined:
    Sep 24, 2011
    Oddometer:
    2,410
    Location:
    The South
    That's awesome info. Thank you!
    #3
  4. shinyribs

    shinyribs doesn't care

    Joined:
    Sep 24, 2011
    Oddometer:
    2,410
    Location:
    The South
    Decided to lighten up this thing this afternoon. Rigged up some straps to get the engine out. Stuff like this makes you really miss the little thumpers.

    [​IMG]

    Rigged up a little trolley for the lump. With wheels. Stupid things weighs as much as I do. No joke.

    [​IMG]

    CBR600RR arm is way too long. Over 3" is too much IMO.

    [​IMG]

    F2 arm isn't bad, though. Only 1" longer if you run the axle all the way forward.

    [​IMG]

    Decided to mock it and have a look. That white rim... :rock:

    [​IMG]

    Surprised that the front fender doesn't look terrible over a 17. I really dig the style of the stock front fender. Might try to pull this off.

    [​IMG]

    That bigass tail floating free in the air makes me wanna try to monoshock this thing for sure now. I need to research F2/F3 bikes and see what the setup looks like. If I have to ditch the stock battery box I'm not sure where else I can mount one, but I am planning to dump the stock air box and run CR's with pods.

    [​IMG]

    The F2 arm is stupid easy to fit. Pivot pin is the same and the F2 arm is much narrower. Spin up two spacers and done. Not much of a visual difference compared to the stock arm, but it is obviously built stronger. Some square tube bracing would put it over the top IMO.
    #4
  5. mike

    mike Long timer

    Joined:
    Mar 2, 2007
    Oddometer:
    4,550
    Location:
    NE MO
    Nice - always liked those bikes
    #5
    shinyribs likes this.
  6. Fubars

    Fubars What would Scoobydo?

    Joined:
    Aug 20, 2003
    Oddometer:
    1,999
    Location:
    Ventuna, California
    Had an 1100F when they came out. Local dealer was selling them cheaper than the 750 Interceptors that came out that year, so for me it was a no brainer. The 6-spoke wheels look good already. I'd clean up the Yoshimura pipe and call it good. And besides, they didn't do undertail cans back then. Works shocks would keep it retro and save some fab time.
    #6
    mike likes this.
  7. shinyribs

    shinyribs doesn't care

    Joined:
    Sep 24, 2011
    Oddometer:
    2,410
    Location:
    The South

    I have a nice set of stock 4-2 pipes here I may use on this bike. I don't think undertail would like right on this bike, I just like seeing that big tail floating. The mono shock thing is up in the air for now. I'm not opposed to twin shocks, but I can go mono for much less money and most likely end up with a nicer suspension. I have a F3 rear shock and linkage on the way to see if it's even viable or not. I'm not building this to be a resto or a track bike, it's gonna be my sport tourer. Long distance highway bike with plenty of power/brakes and can easily haul some luggage.
    #7
    mike likes this.
  8. shinyribs

    shinyribs doesn't care

    Joined:
    Sep 24, 2011
    Oddometer:
    2,410
    Location:
    The South
    Decided to reuse the stock yokes vs swapping on the F3 yokes. Lose too much offset with the F3's and there's a TON of stuff mounted to these yokes to hold up the fairing.

    Got my yokes back from my buddy that bored them for the F3 forks. Plenty of material to work with.

    [​IMG]



    [​IMG]



    Turned up some new axle spacers to make up for the wider fork spacing of the stock yokes.

    [​IMG]



    A thin 8mm washer is all that's need to space the calipers out far enough to prevent dragging, but it's a little on the close side.Need to pickup a little thicker washers. Not worth trying to turn these little fiddly things up.

    [​IMG]



    I have two F3 arms with two different knuckles. I don't know which one is stock, but I'm guessing the gold chromate one is aftermarket due to the finish. Need to figure this out if anyone has a known stock knuckle to measure.

    [​IMG]



    Stuck the bottom end in the frame and have plenty of clearance around the pivot.

    [​IMG]



    Need to determine the exact angle the F3 shock should lay on, but there's tons of space to adjust this thing around.

    [​IMG]



    Frame isn't very far away from the dogbone, so that mount that should be easy to sort out.

    [​IMG]



    Stock battery box won't go back in, but there's plenty of space to mount everything behind the side panels still.

    [​IMG]



    Not a very accurate mockup with a 630 front sprocket and a 43T out back, but chaindrag doesn't look horrible. Pretty sure I was running a 46T or 48T on my '80. I don't think this will be a problem. The arm will flatten some when I'm seated and OEM's put sliders on arms for a reason. My stock FZ has more angle than this.

    [​IMG]



    Lowest part of the frame rails area at 9.25" and the lowest point of the sump is at 7". That's one inch taller than my FZ (6" to the sump drain/pipes), so I'm cool with these numbers.

    [​IMG]



    33" seat height to the lowest section. Not really a fan of the swayback seats, so that will go up some when I get replacement foam. Stance looks good on this mockup and the fork angle is sharpened up a bit at 26 degrees. I think everything is gonna work out just fine [​IMG]

    [​IMG]
    #8
  9. Fubars

    Fubars What would Scoobydo?

    Joined:
    Aug 20, 2003
    Oddometer:
    1,999
    Location:
    Ventuna, California
    Just a top end job on the motor?
    #9
  10. shinyribs

    shinyribs doesn't care

    Joined:
    Sep 24, 2011
    Oddometer:
    2,410
    Location:
    The South
    Nah, I'll have to split the cases to replace the crank seals, I just didn't want the engine scattered in to bits just yet. Stripped down just enough to make it more manageable while sorting out chain run, rear sets,etc...
    #10
  11. fireflyr

    fireflyr Been here awhile

    Joined:
    Mar 16, 2008
    Oddometer:
    867
    Location:
    Keene, California
    Cool build. Had a 750 Super Sport back in the early 80's. Bassani (SP?) pipe, red frame, Vesco Rapid Transit fairing........ Still miss the original Super Bikes. Subscribed.
    #11
    shinyribs likes this.
  12. mach1mustang351

    mach1mustang351 Long timer

    Joined:
    May 12, 2014
    Oddometer:
    1,949
    Location:
    Alaska
    I'm gonna subscribe, but I'm conflicted.., this is one of my favorite Japanese muscle bikes as is... So I like stock... But I like your approach... Stop messing with my head!!
    #12
    shinyribs likes this.
  13. MATTY

    MATTY BORDER RAIDER

    Joined:
    Jun 23, 2014
    Oddometer:
    2,111
    Location:
    England On the Scotish border
    like the fact your keeping the original styling up to a point yet putting your stamp on it with the modifications and as a result firmly making it your own unique bike. I am in like it !:brow
    #13
    shinyribs likes this.
  14. shinyribs

    shinyribs doesn't care

    Joined:
    Sep 24, 2011
    Oddometer:
    2,410
    Location:
    The South
    I'm a huge CB fan myself and have been sitting on this build for 4 years. I was conflicted at first, but I'm committed at this point. :D I think the modern shock out back can transform this vintage bike in to a legit daily bike. I'm not usually one to cut up old machines, but nothing I'm going to do will be irreversible. To create a mount for the dogbone link to attach to I'll be adding another tube for an anchor point, then I'll have to add a couple small hoops to locate the upper shock mount. Everything will be welded to the frame, obviously, but nothing it's getting removed from the frame. I might remove the center stand mounts since they are all hammered over (visible in the pics), but I don't know. These bikes were always bad about dragging center stands in corners anyway. Doubt I'd ever run one.


    I will have to trim the rear splash shield to fit around the mono shock and the battery box will be rebuilt with a homemade setup, but it'll all hide behind the side panels/splash shield. Should give a nice clean finish. The absence of twin shocks will leave some unused cutouts on the side panels, but those can be filled without destroying the panels. These panels were 750 items anyway, so it's not like I'm killing an original survivor.

    Modifications can be done without molestation.
    #14
  15. MATTY

    MATTY BORDER RAIDER

    Joined:
    Jun 23, 2014
    Oddometer:
    2,111
    Location:
    England On the Scotish border
    Good stuff enjoy watching these threads develop i so want to do more on my own bikes but recently my life is that complicated with basic day to day life totally sapping my free time, i am beginning to wonder if i will ever get any free time again it is one thing after another with no let up or so it seems. Watching these threads is interesting and keeps my spirits up just dropping n for a look of an evening.
    #15
  16. shinyribs

    shinyribs doesn't care

    Joined:
    Sep 24, 2011
    Oddometer:
    2,410
    Location:
    The South
    I didn't see your post earlier.

    I know how you feel. I get frazzled at times and it can be really frustrating. If I didn't get to spend some time in the shop and build something occasionally I would lose my mind. Just pick up something small and simple like an old dirtbike or a simple single cylinder and just piddle when you can. You'd be surprised what can be built without buying expensive parts.
    #16
    Kai Ju and MATTY like this.
  17. MATTY

    MATTY BORDER RAIDER

    Joined:
    Jun 23, 2014
    Oddometer:
    2,111
    Location:
    England On the Scotish border
    I am ok for project bikes, its time i am struggling with the most, kids universities and money my big problems at the moment nobody told me it would get this expensive so sudden. :lol3
    Your right about dirt bikes though i manage to keep getting bits and pieces done on my trials bikes but my main road projects a Kawasaki bobber and a triumph 900 street fighter will have to wait their turn im afraid, but back on topic your making progress and its looking good.
    #17
    shinyribs likes this.