The KaTaMaki 650 ADV project (KTM LC4 gets a twin engine swap)

Discussion in 'Some Assembly Required' started by LukasM, Apr 22, 2009.

  1. alpiv

    alpiv Sr. nOOb

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    Reply to: sale-yhbcr-1137030607@craigslist.org <sup>[Errors when replying to ads?]</sup>
    Date: 2009-04-23, 5:57PM CDT


    great project bike!! a car pulled out in front of me and i had no choice but to lay my bike down. the major thing wrong is the front forks are broken. the frame and motor are in great condition. i have a clean title and bike has aproximately 15,000 miles on it. i am asking only 2,000 or best offer, first one with best offer and cash in hand, call it yours! text me or leave a voicemail at 615-517-8450.
    [​IMG]
    #81
  2. LukasM

    LukasM Long timer

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    Hey all,

    For what it's worth, I just transferred the money to the seller of the above mentioned ER-6N. :evil It will get picked up in a week or two, but I probably won't be here when it arrives. I have never bought a vehicle sight unseen, so let's hope it works out.

    http://img.photobucket.com/albums/v663/matzlu92/Er-6N.jpg


    Sam,

    This is getting freakier every time! Are you my lost twin brother or something?

    The chassis looks great, did you weld it yourself? Reading Ron Champion's Locost book is pretty much what started my mechanical interest (although I didn't build one). About 5 years ago I had never even turned a wrench, now I am the worst kind of tool-a-holic and gearhead.

    No, but I like that a lot! I PM'ed you my super secret code name.



    So you gonna get that Alpiv? :wink:

    Mine has similar miles and damage. First owner and dealer maintained, but I am paying quite a bit less. Already have a few requests for parts on the forum where I found the bike.

    With a bit of luck I'll break even after selling what I don't need. :clap
    #82
  3. alpiv

    alpiv Sr. nOOb

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    Not sure, it is a bit too high.
    My 640 motor is till running strong, yet road work is like riding a paint shaker...

    Would love a smoother motor..
    I'm keeping an eye on what you're doing to see how it turns out before I pull the trigger.. (Call me chicken shit, yet I don't have a machine shop).
    #83
  4. byron555

    byron555 Lame Duck Adventurer

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    Might be too late, but I would look at your dr650 for a donor motor. Simply put you can test fit the motor you already have. On top of that parts interchangeability would be nice (same oil filter, etc). The dr650 is stone reliable with oil cooling.
    I would love a 640 adventure with the reliability of a DR650... It would be a perfect bike in my opinion (if such a thing exists)

    I did not read this entire thread, so if someone already mentioned this option, ignore this post:D
    #84
  5. clapped_r6

    clapped_r6 The Spoad Warrior

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    oh hell no, i want to see a 650 twin in that bisnatch!

    he's already done a dr, looking for something different.

    650 ninja! 650 ninja!
    #85
  6. Yardstick

    Yardstick Hydrophobic

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    It sounds like you've decided on a direction for the motor, but I had a thought before I read through all your criteria that could be fun for someone else. KTM 550 2-stroke! :evil:clap:lol3
    #86
  7. LukasM

    LukasM Long timer

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    Yeah, I think you can do better, too. Since these engines appear to break very rarely, there is almost no demand for them on Ebay. There was one without a single scratch on it, 53 miles, starting price $700, and it didn't sell. Another one with 5k sold for $150. If I was in the States I'd try to buy the stuff separately. If you wait for auctions with $1 starting price I bet you would be able to get everything for $400 or so, less if you can go pick it up yourself.


    I agree that something like a KTM with a DR engine would be an awesome package. That was my reasoning when I modded my DR, changing pretty much everything except the frame and engine (although it has FCR carb, full exhaust, stronger clutch, etc). I have a few things to finish up, but IMHO it will do pretty much everything equally well and some things better than a LC4-Adv. Of course you could get more power out of the KTM, but that would come at the expense of fuel consumption and reliability.

    As smooth as the DR engine is though, the twin will do much better on (dirt) roads. Hopefully with a very small decrease in off road ability due to additional weight.


    Well if it will entertain my buddies on ADV, 650 ninja it is! :D


    Swap that engine in a modern EXC-R frame with a big tank, and I'm in!
    Or would you go Adventure touring on a 300lb 2 smoke (albeit insane power)? :eek1
    #87
  8. mtothef

    mtothef Been here awhile

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    must be some transatlantic synergy going on, but as the XT project from hell winds down i've been eyeballing the next time and money hole. initially i had been thinking of proper-dirting an sv650, but then ran into way too many considerations about cylinder and oil cooler and skidplate placement to be happy. so then i started looking at

    ...

    kawasaki 650s. and before i knew it, i was contemplating

    ...

    what frames they'd fit on for rolling chassis.

    go for it! i'll be watching this one closely. a 640 roller makes way more sense than the old twin shock husky 500 frames i've been contemplating. but you seem more sensible than me that way anyhow. the kawasaki engine seems nicely compact. only concern i can see through my internet superpowers is countershaft sprocket to swingarm pivot distance, since the kawasaki motor doesn't seem to have a swingarm mount going through the back of it. but the ktm chassis looks like it'll have loads of room. way more than the usual suspects i have in mind (aside from the old husky roller, been eyeballing the scads of cr and yz frames around here...)

    yeah! this ought to be cool!
    #88
  9. ADVJake

    ADVJake ***** dweller

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    except the 640 is just as reliable as a DR... :hide
    #89
  10. Skippii

    Skippii Milkshakes, my lad.

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    #90
  11. clapped_r6

    clapped_r6 The Spoad Warrior

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    i don't think you can get a spark arrestor for that.
    #91
  12. Foot dragger

    Foot dragger singletracker

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    Ive got an idea,you like to wrench and seem good at it,theres a perfect motor that will bolt right in.The stock snappy good running Lc4,just bulletproof it,there are more then a few standard fixes that will get one to 60,000 miles with out exploding. Boring I know but there it is.
    Having a high performance single AND getting 55mpg are probably not going to happen easily though.
    #92
  13. Foot dragger

    Foot dragger singletracker

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    Now thats just crazy Talk!
    #93
  14. rickf

    rickf oldfatguyMAN

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    Might want to consider a larger fuel tank..........................
    #94
  15. kyns

    kyns Long timer

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    Lukas. Glad to see you are going, apparently with the er 6 engine. When i had mine, i was playing with the idea, of havin that engine in a dirt bike. But i saw one problem. The oil sump under the engine, extends quite low. When you have the engine in the Ktm frame the sump will probably go lower than the frame rails. I think it can bee fixed. The piece that goes low in the sump, is the area that has the drain plug in it, i think you could cut most of it away and make a new thread for the drain plug. If i remember right you can un bolt the sump without splitting the engine, so it should not be too bad to do. I hope! Anyway good luck with the build!:lurk
    #95
  16. earthroamer

    earthroamer Stuck in Pindadesh

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    Well, I'm glad I only have to watch. My first choice would be, like suggested, to make the LC4 more reliable. I've seen people do this. For a transplant I'd go with the F650 Classic motor. Dual carbs (in the rear), very tunable, reliable, good mileage and I see a lot of low mileage ones on CL. They still hold a good price, tho, so maybe a wrecked one. But in the long run, no matter what you put in that KTM frame, how is it going to be that much better than a KTM?
    #96
  17. Sycamore

    Sycamore d00b

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    If somewhere, somehow you could find one of these that hasn't been run into the ground - early 80's XT500.
    I don't think 4 stroke singles ever came more reliable.

    [​IMG]
    #97
  18. dwayne

    dwayne Silly Adventurer

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    An aircooled rotax (flat track engine) would be pretty cool.
    #98
  19. alpiv

    alpiv Sr. nOOb

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    LukasM: Looking at the engine and knowing that the 640 Adventure's air box is too small even for the 625 motor, what are you thinking for the air intake for the dual carb?
    #99
  20. IheartmyNx

    IheartmyNx Ihave2draft

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    This looks fun...



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    <embed src="http://www.youtube.com/v/2CnEYhExAXc&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></object>



    Some of you guys don't seem to think there is much difference in a Versys and Ninja...for the fun factor, I'd say Ninja. While the engines are the same, the significance is the Versys has a lower c/r.


    The Versys has a lower compression ratio and different mapping in the computer than the Ninja. FFT when making a decision...You might can use a lower grade of fuel, and get a better, more usable mid-range...

    But if I was going this rout, I'm sorry but I'd have to give the power nod to the Ninja engine.