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Thread started 07 Oct 2010 (Thursday) 02:54
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GKPE 8, Yet more NZ ramblings from some flightless Kiwis.

 
akiwi
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Aug 26, 2012 02:45 |  #4276

Dream on! ;)

I have a problem at the moment,
My eldest son bought a mini quad a few weeks ago with a 49cc 2 stroke. Fun and not too dangerous. But loud.
My younger son saw it and said I want to buy one too, but I don't want a quad, I want to buy a motorbike. I don't like motorbikes and tried talking him out of it. Till my wife said I was being unfair. So I allowed it. I also saw what a cheap and nasty thing the 2 stroke was, so guided him towards a 4 stroke. It arrived the other day and holy cow it is scary. It goes so fast! 125cc 4gears. Top speed 95. I didn't realize it went so fast when I ordered it for him over e-bay.
Because he bought it with his money it is a bit more difficult to ban it etc.
How easy is it to put in a limiter or something?
Luckily through BMX he has full protective gear, but what would you guys do?


Peter
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Mark ­ Vuleta
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Aug 26, 2012 02:56 |  #4277

Sugar in the fuel tank will fix it for a while!!

Had a big clean out in our garage the last weekend, can get a car in it now, need to get rid of our quad, 110cc 4 stroke, geared to do about 50k, it's yours if you pay the freight.

IMAGE: http://www.pbase.com/mark_vuleta/image/101178968.jpg



  
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Moppie
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Aug 26, 2012 04:48 |  #4278

akiwi wrote in post #14907589 (external link)
How easy is it to put in a limiter or something?
Luckily through BMX he has full protective gear, but what would you guys do?

Pit of plastic with a hole in about half the size of the intake, and put it between the carb and the intake manifold.
Will make for a simple throttle restrictor plate which will stop it reeving and making full power.
Should work for about as long as it takes him to find a spanner and remove it.


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Have you Calibrated your Monkey lately?

  
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tongmaster
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Aug 26, 2012 22:44 as a reply to  @ Moppie's post |  #4279

This is a bit of a warning for the wedding photo folk -
http://www.stuff.co.nz …r-photos-in-wedding-dress (external link)


Canon 5D MkII, 24-105 F4L IS, Flickr (external link)

  
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tongmaster
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Aug 26, 2012 22:46 |  #4280

akiwi wrote in post #14907589 (external link)
Dream on! ;)

I have a problem at the moment,
..... but what would you guys do?

Sell the lot and buy a yacht! Not very helpful, especially in Munchen, but you did ask!


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akiwi
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Aug 27, 2012 04:53 |  #4281

Moppie wrote in post #14907731 (external link)
Pit of plastic with a hole in about half the size of the intake, and put it between the carb and the intake manifold.
Will make for a simple throttle restrictor plate which will stop it reeving and making full power.
Should work for about as long as it takes him to find a spanner and remove it.

Thanks, Will look into that.

tongmaster wrote in post #14911013 (external link)
Sell the lot and buy a yacht! Not very helpful, especially in Munchen, but you did ask!

Oh.. OK
You mean something simple like this? (external link)


Peter
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manipula
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Aug 27, 2012 05:46 |  #4282

Nikon D800 update.

Even with their 35mm f/1.4 on it, I'm still not 'getting' it. :/

Carry on.


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weka2000
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Aug 27, 2012 22:43 |  #4283

manipula wrote in post #14911788 (external link)
Nikon D800 update.

Even with their 35mm f/1.4 on it, I'm still not 'getting' it. :/

Carry on.

Why?


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RobDickinson
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Aug 27, 2012 22:49 |  #4284

Send it over here, I'll try...


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klippe
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Aug 28, 2012 16:47 |  #4285

Moppie wrote in post #14907731 (external link)
Pit of plastic with a hole in about half the size of the intake, and put it between the carb and the intake manifold.
Will make for a simple throttle restrictor plate which will stop it reeving and making full power.
Should work for about as long as it takes him to find a spanner and remove it.

That's a good suggestion. You could also just limit the amount of throttle available on the throttle/carb body itself (there are likely some adjustment screws you can use to limit the throttle opening gap). Depending on how much screw there is, you might have to insert a larger screw to further limit movement.

Bear in mind that placing a restrictor of sorts in the carb might have some unwanted consequences such as flooding/pooling of the air/fuel mixture. This can lead to some erratic engine behaviour ('bogging down' one minute, shooting off the next). It would be worth trying it before just throwing it on and hoping it works. Would hate to see your boy thrown off the bike when it suddenly accelerates as it clears a pool of fuel and comparatively 'leans out'.

Cliff


The impossible has begun - another step closer - and I am very hungry for it.
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Moppie
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Aug 28, 2012 19:38 |  #4286

The strictor plates I've seen are either offset to stop pooling, or you can put them on the intake side of the carb as well.

Restricting the throttle opening is a good idea, as it will also stop it running rich.


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joeseph
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Aug 29, 2012 02:56 |  #4287

Moppie wrote in post #14907731 (external link)
Bit of plastic with a hole in about half the size of the intake

would it be not be more sensible to make a plate out of aluminium? then you'd be less worried that melted lumps might get into the whirring bits...

other options include taking the wheels off. ;)


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akiwi
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Aug 29, 2012 03:03 |  #4288

I am not sure Plastic is such a good idea because of melting if it gets hot...
(Not sure how hot a Carb gets)
If I try it, I'll set the hole at the bottom.
Restricting the acceleration is also a good idea


Peter
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Moppie
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Aug 29, 2012 03:56 |  #4289

I'm thinking more of ease of use and build.

Of course Aluminium would be better, but I can't imagine the intake side of a little 2 stroke bike gets so that hot that plastic in the carb would turn molten and flow down the intake.


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joeseph
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Aug 29, 2012 04:03 |  #4290

there's plastic, then there's Plastic (external link)


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GKPE 8, Yet more NZ ramblings from some flightless Kiwis.
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