Engine swaps- bigger is better thread

Discussion in 'Road Warriors' started by Kai Ju, Jun 16, 2010.

  1. Kai Ju

    Kai Ju Long timer

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    I've been looking but haven't found a thread dedicated to the fine art of engine swaps.
    I've seen lots of posts in other threads but none dedicated to the art of getting the power you want into a chassis that deserves it.
    I'll start with two of my own.

    1986 250 Ninja with a 600 Rotax single. ( I've sold it many years ago and I think the owner might actually be an Inmate, if so, let me know, I'd like to know how the bike is doing )

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    and here is my current daily rider, a 1989 CB1 with a '96 F3 engine.

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    Both conversion roughly doubled stock horsepower and the fun factor.

    Let's see your swaps.

    Now that the bike is sold I'll transfer the pics from the add to here:


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    ....and here is what it looks like today:

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    Here are pics I took today that show the new mirrors ( CB1000R ) and the muffler mount as well as a bunch of detail shots.

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    And here is a video clip of what the engine sounds like, cold engine start.

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    Here is the nitty gritty:
    CB-1 frame modified to accept the F3 engine with the proper support.
    F3 carbs nestled between the frame rails and an F3 airbox that fits under the stock tank.
    Wireharness modified to use the TPS the F3 carbs come with, correct temperature sender installed to work with the new gauges.
    Full race stainless headpipes with a Ducati 1098 muffler
    2007 CBR600RR forks with radial calipers and gauges from the same model.
    F3 wheels front and rear with proper sprocket alignment.
    CBR900RR rear shock with ST1300 spring. I will also include the stock CB-1 shock as well as the stock CBR900RR spring. The shock was rebuilt at the time the frame was stripped bare to be painted.
    Wet weight is 406 lbs, rear wheel horsepower is 94.
    Current mileage is just under 10,000 miles.
    The fuel tank and tail section were NOS and installed when I painted the frame, swingarm, wheels and engine around Christmas a couple of years ago.
    #1
  2. plugeye

    plugeye mc caregiver

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    :lurk
    #2
  3. PeteN95

    PeteN95 Long timer

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    Here is one of my old race bikes. 1980 Suzuki GS750 Wes Cooley Yosh replica with an '81 GS1100 motor.

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    #3
  4. jdiaz

    jdiaz .

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    Love the CB-1! Nice work.
    #4
  5. Kai Ju

    Kai Ju Long timer

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    #5
  6. doug s.

    doug s. Long timer

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    bump - new pics were added today! :1drink

    i wanna see more!!! any other hot rod bikes out there?

    doug s.
    #6
  7. BlueLghtning

    BlueLghtning Riding is my passion

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    Thanks for adding the pics. I'm gonna follow this thread to see what your next project is. :D
    #7
  8. Dilligaf0220

    Dilligaf0220 Miserablist

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    I kinda liked the lil' Ninja from hell in speckled Robin Egg Blue. :lol3
    #8
  9. Kai Ju

    Kai Ju Long timer

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    Me too, but I gave in to peer pressure when I chose the hammer finish grey.
    That bike was a bit of a chore around town, but man in the canyons, what a hoot.

    Here are a couple more pics:

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    #9
  10. Grainbelt

    Grainbelt marginal adventurer Super Moderator

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    #10
  11. Kai Ju

    Kai Ju Long timer

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    Thanks for the heads up, I wasn't aware of that one.
    I started this thread in 2010 and only had one other inmate chime in but it caught some airtime when I put my CB-1.5 up for sale.
    Funny how things work out.
    If an admin wants to move it, please do so.
    #11
  12. samadams0824

    samadams0824 Been here awhile

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    that cb-1 is gorgeous
    #12
  13. thatdirtykid

    thatdirtykid Been here awhile

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    fresh relocated in longmont
    I thought I had found a bigger thread on engine swaps. This is all google could scrounge up. Anyway, instead of starting a new thread, I just came across this death trap I would love to own on ebay.

    Yamaha DT 250 with a CB750 stuffed in it...

    I would be way into a bike like this with slightly more modern suspension and brakes. That and a real headlight. I am sure its not for everyone though.
    #13
  14. Kai Ju

    Kai Ju Long timer

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    That guy has bigger balls than I do, looks like a clean build as well.
    I also like his take on some of the stuff that's out there being hailed as custom/bobbed/special etc.
    His bike is.
    Thanks for adding that one to the mix. Are you going to buy it ?
    #14
  15. EetsOK

    EetsOK Been here awhile

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    I had a 1974 DT 250 and it could barley cope with the original a/c 2 stroke 250 single. Can't imagine a Honda 750.
    #15
  16. omnivore

    omnivore SuperSportTourer

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    Wow...do I ever love that CB1!!
    My bro had a brand new one when he was 17...it was awesome, and seeing yours, especially in stock colour, brings back memories.
    #16
  17. Lornce

    Lornce Lost In Place

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    Kai Ju, Your bikes are remarkable.The detail on the CB-1 is outstanding. Very fine work. :thumb

    Would love to take a twisty rip on that Rotax Ninja. That thing must have been a hoot. :thumb


    I'm not worthy to sully your fine thread, but here's a pic of my old GSX-R-7/11. It's an '88 GSX-R 750 chassis with an '87 GSX-R 1100 mill built by Canadian Superbike tuner, Bill Mason. Flowed head, 1186cc Wisecos, Stage III Yosh cams, Mikuni flatslides, Vance&Hines ignition and race pipe. Was kind of a dog on the bottom but went berserk when you wound it up. 146rwhp. Took me as fast as I've ever been on a motorcycle before backing out of it at 280km\hr.

    Before a tire change in the pits at Mosport.
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    #17
  18. Kai Ju

    Kai Ju Long timer

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    I like the ATGATT, not to mention the lubricant used during the burnout.
    Glad you like the CB-1.5, it was fun to build and a riot to ride. Biggest problem was my knees. I would be fine for the first hour but after that my knees would scream in agony and you had to peel me off the bike once I got home.
    I replaced it with my R100/7 that now has me spending a whole lot of time hanging out in the Airheads forum.

    The Rotax was a pain around town, it had a bad habit of stalling right as the light turned green and a left side kickstart really sucks when your left leg only knows about shifting.
    But once you got to the canyons it made it all worthwhile.
    #18