Kawasaki 650 Thinja notes; parts bin build

Discussion in 'Some Assembly Required' started by dentvet, Jan 23, 2011.

  1. MN_Smurf

    MN_Smurf Capt_Confusion

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    I just had Spencer do his LD mod to my Versys seat.....$120 including shipping both ways from Detroit. It improved my seat from less than 2 hours before I had to stretch up to 3 hours before needing to get off.
    #61
  2. sanjoh

    sanjoh Purveyor of Light

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    Ugly even on a rat build:D

    Seat mod with the ld option is $75 +ship. The stock seat has a crown in it which you already know about, no crown with the modified seat.
    #62
  3. jdrocks

    jdrocks Gravel Runner

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    can't be...anything goes. spencer or the big air hawk will do it. ride all day. i use the air hawk, bought a like new one from the flea section.
    #63
  4. LoCoMatt

    LoCoMatt Busy

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    freakin' cool! :thumb I think you've pulled off the "poor man's F800" quite well!

    I might have to try this after my current project ... :hmmmmm
    #64
  5. pilot

    pilot Slacker Moderator Super Moderator

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    Any news on this one?
    #65
  6. YZman

    YZman Bouncing off Trees

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    Cool bike man.

    Here is something else you can do with a Ninja motor... build yourself a hill climb bike out of it like my neighbor did. Frame and swingarm are his design.

    The bike in the background is a RD350 motor in a CR250 chassis... hill climbers are a little ..... off :lol3

    [​IMG]

    Oh and if you really want nutz....how about a zx1000 climber on nos! Yep he built this one also

    [​IMG]

    Anyways... back to your build. Love where your going with it.
    #66
  7. dentvet

    dentvet Long timer

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    that hillclimb rig looks nasty. Sorry this has been dormant for a while. I've been busy riding:clap:clap:clap

    [​IMG]

    I met my brother out in colorado. hadn't ridden with him in 20 years so i hauled a few bikes out for some fun, including the Thinja.

    [​IMG]

    She's heavy but very capable. I couldn't go very fast in the whoops because the suspension is pretty soft. very docile and tractable everywhere. Superb low end grunt with zero hit anywhere.

    The stock muffler is very quiet and you can lug the thing so low that its almost silent on the trails. I rode it standing 100% like a normal trail bike and worked the clutch with regularity; totally normal. Fan was almost always on as we climbed up to 11000 feet in first and second gear.

    I was glad i put the chin fairing back on as I haven't built a skid plate for it yet. I rode it places I shouldn't have but had a ball.
    #67
  8. dentvet

    dentvet Long timer

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    As you might imagine, it was an ideal bike for cruising around Yellowstone.

    [​IMG]


    I got lucky with this shot as far as framing the subject on the fly.

    [​IMG]
    #68
  9. dentvet

    dentvet Long timer

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    Bikepilot was concerned with the ground clearance measurement with respect to the suspension travel numbers. I took it fairly easy on the bike as I was a long way from home but there was a particular water break that i sailed off that resulted in a bottoming scenario. Perfectly flat launch and landing with a nice balanced bottoming of both front and rear suspenders. No chassis was dragged nor was I ejected from the cockpit.

    No footpegs were snapped either but i have found the bike worthy enough to warrant the footpeg upgrade, especially as my feet were sore from standing on the thin buggers all the time.

    Jeep trails and OHV trails in CO:

    [​IMG]


    I hate that the video makes the slopes less steep and the rocks less big:lol3
    #69
  10. ktmklx

    ktmklx Been here awhile

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    #70
  11. dentvet

    dentvet Long timer

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    Your build and saddle time have blown mine away, good job. I just got a spool gun so maybe i can stitch some aluminum plates together at least.

    I probably saw 2000 harleys on my trip out west given that sturgis was imminent. vroom vroom....
    However, this bike stood out from the crowd,


    [​IMG]


    Is it a tdm, xlv etc?
    #71
  12. bluegroove

    bluegroove Motorcycle junkie

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    How is that rear suspension working? That funky arrangement is the only thing that makes me hesitate to dive in and build one of these myself. Somehow it just seems wrong to me to only have about half as much travel in back as you have in front. It also looks like the front rides a little higher...? Creating great high speed stability, slow turning response and poor front end traction...? I'm just speculating now of course. I've also been a dirt bike rider for 36 years and I'm fussy about handling, so maybe I'd never be happy with it :cry

    Regarding the oil drain plug extending down so far: I was at the Sacramento mile flattrack race and several race bikes were powered by ninja 650s. I noticed the plug was not sticking down. I asked a race team mechanic. He said they cut it up and then weld it back on.
    #72
  13. vander

    vander full-time dreamer

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    #73
  14. dentvet

    dentvet Long timer

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    I just copied somebody else's build without too much analysis beforehand. The bike seems to handle OK but I can't say I have pushed it very hard. I also haven't tried to tune the suspension either. It has forks from a 250# MX bike and a shock from another brand of sportbike with linkage-type suspension.

    I measured the rake; 32 degrees

    I measured the trail; 133mm


    I could reduce rake by dropping the forks in the triples at the expense of wheel travel (might make it more balanced)

    I could reduce trail by switching to a 19 inch wheel or 17 at the expense of obstacle rolling ability?

    I don't know if I need to do any of theses things because I have nothing to complain about yet.

    As far as the oil pan, I have found it a non-issue so far because the stock muffler protects it pretty well and I still have pretty decent ground clearance.


    I just built this a fun project on the cheap so maybe I don't expect too much out of it. Thanks for getting me to think about how it might be improved upon.
    #74
  15. dentvet

    dentvet Long timer

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    Still picking away at some of the loose ends. There was no mudguard whatsoever in front of the rear tire and the rear mudguard had been hacked off so there is mud splattered all over the poor bike.

    Conveniently one of the fenders in the parts bin is silver rather than the typical orange or blue. Some quick bandsaw surgery yielded appropriate tissue grafts for mud abatement.

    [​IMG]


    [​IMG]


    Better than nothing, i guess.
    #75
  16. rubberband

    rubberband Will ride for tacos

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    You need a proper skid plate! great build
    #76
  17. dentvet

    dentvet Long timer

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    Thanks and i'll get to it soon hopefully. There are a couple of threads on these bikes with typical questions arising.

    mine weighs 415# with 4 gallons fuel in it, definitely a pig if you lose momentum or drop it.

    The stock exhaust does touch the swingarm but i find that the exhaust tip is malleable enough that it doesn't bother me. i don't think the exhaust can proper hits the swingarm, especially when you account for race sag. The stock exhaust is very heavy and therefore very quiet which is really important to me. what difference is 415# vs 410#?

    my mud guard needs some work

    my motocross tire has gone about 1000 miles and was almost half gone when i mounted it

    pic of failed mudguard and exhaust considerations. the exhaust tip is just a thin valence and could be resected easily

    [​IMG]
    #77
  18. dentvet

    dentvet Long timer

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    Not much in the way of progress but since all the cool kids have them, I'm going to set up a set of 17/19 wheels for the ole Thinja.

    This was attached to a pear-shaped rim so i figure I'll build a 19 incher out of it.

    [​IMG]


    Ebay yielded a ktm rear mx rim 2.15 in width. Nest step is to call these guys and get some spokes to make things work out, hopefully.

    http://www.buchananspokes.net/categories/custom_spoke_sets.asp

    Next is to decide what tires to get. I already have the knobbies in 18/21 and a set of sumo wheels with street tires in 17/17. The logical mid point might be something like these Shinkos

    http://www.motorcycle-superstore.com/2/29/393/20401/ITEM/Shinko-705-Series-Dual-Sport-Rear-Tire.aspx

    I need advice on the tire selection and if there is anything special about the tubes i'll need, mixing radial and TT TL etc. etc
    #78
  19. ktmklx

    ktmklx Been here awhile

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    I can't recommend the Kenda Big Blocks, poor tread life, around 1200 miles on the rear and almost gone.

    I was thinking about going to a 21, but now I know I'm rolling with the cool kids, I'll keep the 19.:rofl
    #79
  20. jdrocks

    jdrocks Gravel Runner

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    forget the kids, does that make me a cool grandpappy?
    #80