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Thread: GN250 Cafe Racer

  1. #31
    Join Date
    19th February 2013 - 21:52
    Bike
    92 GN250
    Location
    Newcastle
    Posts
    20
    Thought i would drop in and post a pic of my GN that is still in the works.

    Still have a few things to do...main ones being:

    Somehow changing the fork oil to a higher weight. Hopefully stiffen things up a bit

    and get the damn thing going, especially after ive cut out the airbox. CV Carbs and pods dont mix apparently.

    Ace
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  2. #32
    Join Date
    17th July 2005 - 22:28
    Bike
    Dougcati, Geoff and Suzi
    Location
    Banjo town
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    CVs and pods aren't great but I had mine running on a foam pod and it was fine. I've got a standard airbox with a brand new OEM filter here in a box somewhere

    Very neat looking GN, good to see another with wires!
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  3. #33
    Join Date
    19th February 2013 - 21:52
    Bike
    92 GN250
    Location
    Newcastle
    Posts
    20
    Ive been doing a bit of reading about the CV pod thing...not a lot of good info out there. Going a foam pod or using the K&N pod helps things a bit.

    The wires are looking great...thats why i bought the 92..

    Rejetting should be fun...

    Any idea on how to take the top cap of the forks? It looks like it has a small keyway for a special tool...i have no idea

  4. #34
    Join Date
    17th July 2005 - 22:28
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    Dougcati, Geoff and Suzi
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    Banjo town
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    http://dl.dropbox.com/u/26633588/GN250%20Manual.pdf here's my copy of the owners manual
    Can't remember un doing the fork caps on my last GN, but I think they have a circlip just above the cap?

    Tuning it is piss easy mate. I just shimmed the needle and had a 134, or 136 jet in it, ran fine on a high comp 300cc motor
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  5. #35
    Join Date
    19th February 2013 - 21:52
    Bike
    92 GN250
    Location
    Newcastle
    Posts
    20
    I dont rememebr a circlip..hmmm

    It looks like a cap with a small round indent at the top with a small key way section...

    Know of any place to get jets for the carby? I only have a 140 and 145 main jet. Mind you i dont have the stock exhaust anymore.

    Cheers

    Ill take a pic of the fork tops tomorrow if that helps

  6. #36
    Join Date
    17th July 2005 - 22:28
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    Dougcati, Geoff and Suzi
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    Banjo town
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    eBay. Buy mikuni or factory pro numbered jets, Keihin and Dynojet will fit but use different numbering
    I have a GN in my garage, so I can have a look at the forks (mine are in need of a rebuild anyway)
    Here's my little toy if you're interested http://www.customfighters.com/forums...16#post1217516
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  7. #37
    Join Date
    19th February 2013 - 21:52
    Bike
    92 GN250
    Location
    Newcastle
    Posts
    20
    Ebay does seem to be the way to go for jets. I'll probably pick up a few and see how it goes.

    Nice GN. Tanks looks cool, what's it off?

  8. #38
    Join Date
    17th July 2005 - 22:28
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    Dougcati, Geoff and Suzi
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    Cheers, it's a GS450 tank, needs the extra capacity, I don't think a standard tank will last long with that motor, plus the standard tank looks gay

    It looks like you just drive the cap out with that little keyway on the forks.
    I'm going to design a preload adjuster for mine, just because I can.
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  9. #39
    Join Date
    19th February 2013 - 21:52
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    92 GN250
    Location
    Newcastle
    Posts
    20
    I thought I recognised the tank.

    It's an odd setup that key way.. There must some special tool?

    After some reading ill probably shim the springs and try some heavier weight oil.

  10. #40
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    17th July 2005 - 22:28
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    I did them on my old GN and I'm pretty sure I used a flat blade screw driver and hammer to tap it around

    Don't go too far with spacers because the srings will bind under compression.
    They take 10w oil as factory, much heavier makes the damping action slow and weird
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  11. #41
    Join Date
    19th February 2013 - 21:52
    Bike
    92 GN250
    Location
    Newcastle
    Posts
    20
    I thought the same thing, flat blade screwie and a hammer but its a mighty small key way...

    Ive read shimming up to an inch or so should be fine...I guess ill have to see when to finally get the thing going.

  12. #42
    Join Date
    17th July 2005 - 22:28
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    Dougcati, Geoff and Suzi
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    My old one had 20mm shim and 15w fluid, still handled like a heap of shit
    The only way to make it handle is brace the frame, put new forks and shocks on and brace the swing arm

    Or put a DR600 motor in it and leave it stock
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  13. #43
    Join Date
    19th February 2013 - 21:52
    Bike
    92 GN250
    Location
    Newcastle
    Posts
    20
    hahahaha well it seems im up shit creek then

    Did you use PVC pipe as the shims?

  14. #44
    Join Date
    17th July 2005 - 22:28
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    Dougcati, Geoff and Suzi
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    I had some random alloy blanks floating around that I threw in there but really, the spring rates are shit and the "valving" is a joke
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  15. #45
    Join Date
    19th February 2013 - 21:52
    Bike
    92 GN250
    Location
    Newcastle
    Posts
    20
    Ahhh good to know...as long as it goes to be honest

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