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Project GT250 Fun and games!!!!!!!!!!

Discussion in 'Your 250cc Projects' started by Damian_74, Oct 20, 2019.

  1. Damian_74

    Damian_74 Active Member Premium Member

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    Find of the year - NOS exhaust pipes..........yes that is 45 year old New Old Stock pipes!!!!

    Was a fair price at $800 delivered, not cheap....but then they aren't exactly falling from trees.

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  2. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    No way , that is insane that you could find them
     
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  3. Damian_74

    Damian_74 Active Member Premium Member

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    Got the remainder of the engine bolts zinc plated so time to put the engine back together before I forget how it all went - as it is I am heavily consulting the parts manual followed by some frantic searching of all the zip lock bags stashed under the bench.

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    Still a long way to go but nice to see the engine in its intended home.
     
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  4. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Looking good, it'd be so nice to have that much space to work too
     
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  5. Damian_74

    Damian_74 Active Member Premium Member

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    Was searching Gumtree the other week - bloke in Adelaide bought up all the exhausts when the vintage Suzuki bloke went bust down there - we was only after GT750 stuff and these were in the pallet. Was very nervous about sending money to a stranger half way across the country but after talking to him and google stalking him, found that we was heavily into the VJMC he seemed to be a straight shooter.

    Couldn't be happier.

    Now the question form here on will be.........do I run my tatty exhaust on most of the time and fit the NOS exhausts only when I want to pose - or just leave them on and enjoy the bike?
     
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  6. Damian_74

    Damian_74 Active Member Premium Member

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    Never have I seen a set of carbies this dirty - one of them appeared to have spent some time under water. The float bowl was full of oxidation. Every port was completely blocked - I needed to run a drill bit (by hand) down every gallery.

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    Started with a hot wash to remove the gunge on the outside - camp cooker, small pot of water and a dishwasher tablet. worked a treat! was checking on them every few min. but in total each one was in there for about half an hour.

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    Then a week-ish solution of Phosphoric Acid - again checking every few min so that I didn't dissolve the base metal.

    The entire process took the entire arvo - I need to find someone with an ultrasonic cleaner to try and get the remaining rubbish from the galleries.

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    After talking to the bloke at MikuniOz - he has NEW VM28's for about $150. With the new needles that I have bought from Suzuki, he thinks that he can supply a BRAND NEW set with jetting fairly close to OEM. If this was the Cafe Racer it would be an easy decision, but as I am doing a restro I am tossing up which way to go - NEW will obviously be easier to ride and live with (will more than likely ditch the points too) but the Rivet Counters won't like it as they look slightly different.

    https://www.mikunioz.com/product-category/vm-carburetors/vm28-carb/?v=6cc98ba2045f
     
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  7. Damian_74

    Damian_74 Active Member Premium Member

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    Stripping all the good bits form the recently deceased GT250 L - started with the tyres - all going to a good home.

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  8. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    What happened to the GT250L?
     
  9. Damian_74

    Damian_74 Active Member Premium Member

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    If you read back a couple of pages it is all there...... basically I failed to close the fuel cock after a ride and have buggered the crank seals......am eventually going to cafe it.....after I finish this one.
     
  10. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Oh for some reason I missed page 1. Thats some great work you're doing there. It's really good to see all these talented people doing marvellous things on this forum. We all get to learn stuff and get new ideas.
     
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  11. Damian_74

    Damian_74 Active Member Premium Member

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    So close......yet, so far away...

    Chrome won't be till February at best - and lots of other bits in January (am away for work most of that month).

    There might be a go slow on for a bit.....

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  12. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Damn, you are doing some fine work there.
     
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  13. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    Wow , she looks really pretty
     
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  14. Damian_74

    Damian_74 Active Member Premium Member

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    My little sand blaster is average at best - thought that I should start with condensate management first.

    My air compressor is nicely tucked away in a relatively sound proof room, in a corner under a bench - hence I almost never drain the tank - solution......fit an auto drain valve......about $30 from eBay....

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    Works well - a considerable amount of water draining from it in Brisbane's sweaty +30 deg heat. There are two user adjustments, length of blow-downs and time between blow-downs. Set mine for 5 sec every 10 min.

    My little blaster is the typical syphon tube style gun indicative to the cheap Chinese cabinets. Its frustrating with the stop start nature of the blasting media.

    After many hours of Goggle research the best option would be fitting a metering valve (it introduces air into blasting media through a controlled orifice or valve). I ended up making a DIY version from 1 1/4" galvanized fittings but I don't think that I really saved much compared to buying the eBay versions for about $100.

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    Thought I would have another go at the walnut shells - still no luck - I think that they need a higher pressure and flow than my compressor can support.

    As the system now uses a foot valve rather than the hand trigger, it's more comfortable - no more numb hand but as the gun and hose set up is larger, my little cabinet gets cramped.....if only my shed was bigger......never enough space!!!!!!

    So I loaded up with FINE glass beads time to attacked my carbies!
     
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  15. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    i suggest sealing all the holes before you blast.
     
  16. Damian_74

    Damian_74 Active Member Premium Member

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    The cabinet came with all the joints caulked but there is no need - as I run a vacuum system the cabinet is in negative pressure - hence no leaks.
     
  17. Damian_74

    Damian_74 Active Member Premium Member

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    Mikunioz delivery arrived Monday - good service and knowledgeable.

    With the fine glass bead and running at about 50 psi I ended up with a slightly shiny surface, free from stains. Not as good as Vapour Blasting but not too far off it. Down side is cleaning afterwards - just when you think that you have it all clean out pops another lump of grit.

    New main jet, pilot jet, Needle (Suzuki supplied), needle and seat, base gasket, floatbowl screws and O rings (Viton grab kits).

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    Rather happy with the way they turned out - especially considering the condition beforehand!
     
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  18. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    I struggle to get a finish as good as that , well done.

    I think @maelstrom was referring to getting bead stuck in the hole sin the carbs which will bugger them up, make sure you blow all out
     
  19. Damian_74

    Damian_74 Active Member Premium Member

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    My bad - sorry Maelstrom I misunderstood you - but these carbs were the worst I had ever seen. Every passage was full of grit and corrosion before I started - a bit of blasting grit wasn't going to make a difference!
     
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  20. Damian_74

    Damian_74 Active Member Premium Member

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    Home for a bit, plenty of eBay booty kindly collected by SWMBO.

    Rivet counters - look away NOW.

    Came across a NOS headlight and supports in the US in glorious chrome that I just had to have. My GT is a 9/76 which makes it a B model. They came with black headlight bowl, headlight brackets and unpainted black side covers - bit of a budget model at the end of its production
    So I'm going to slightly diverge form 100% authenticity and go with what looks good.


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    Spent the day on the polisher and finally finished all the cases - very happy with the result!

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