Zephyr 550 -> 600 conversion

[proximity]

Check it out, it runs!!!
I was suprised to see that after all the work ive done to it, it started pretty much straight off the button.

The baffle i made for the exhaust seems to be keeping it at a nice level but it sounds awesome still.

Video here, its under 1mb:

https://homepage.ntlworld.com/jason.lovell/project/gpx%20runs.wmv

Edit: Progress pic

https://homepage.ntlworld.com/jason.lovell/project/bike%20complete.jpg
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2004 Aprilia Tuono

[trevoriv]

lol you look like you suprised yourself in that vid

[DaveH]

Excellent

[edd]

it just feels so wierd looking at that bike and hearing completely the wrong noise coming from it. It sounds hella cool.
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Bluespark Automotive - Diesel Tuning for Performance and Economy

[proximity]

Well i went for a blast on it.
Its really fast, however the jetting is completely messed up.
It stutters at low throttle positions and when crusing or at speed.
Im gonna try and get a dynojet kit for it.

I think part of the problem is me using the zephyrs airbox, so ill see about getting pods or making the GPX one fit.

https://homepage.ntlworld.com/jason.lovell/project/zrx600.jpg
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2004 Aprilia Tuono

[Whosthedaddy]

[proximity]

It will be a jetting problem, cleaning the carbs would be a good start because its free. Could possibly just be carbs out of balance.
A dyno test will show the problem aswell, but its fairly expensive.

Anyone know the cost of setting up carbs on a dyno? I think im gonna have to.
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2004 Aprilia Tuono

[Whosthedaddy]

[proximity]

It was a piece of cake. The welding was probably the hardest bit, but we just made a mess and then cleaned it up with an angle grinder.

It was just a case of cutting a corner and putting it on the downpipes, then making a rough guess of the next piece and cutting that, taping it on each time and just gradually building up the shape, cutting bits down and adding more pieces like a puzzle. Once it was all taped up we marked where the pieces join and then tack welded them all.
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2004 Aprilia Tuono

[Whosthedaddy]

It looks easy enough to do, always fancied a go at welding. As you said, just angle grinder them clean

Bike looks good by the way
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Current : MSX 125 Past : CBR 900RR Monkeybike : c50 LAC : ZXR750 H2 : FZR600 : ZX7R P3 : YW100 : TRX850: Trophy 900 T309 : GSXR 600 L0: Monkeybike : XJ6S Whosthedaddy

[chalky143]

[alien.46.uk]

Very nice indeed!

Why not have belly Exhausts ...

Cant remember which bike had them, was it the buell or something?

But have them underneath, that would look quite cool, but you need to do something about your exhaust anyways, could be project number 2 , lol ...

I might be doing a similiar thing, when i have my Full License, putting a 650 into my 125 [Dont worry the 125 Model used the 650 Frame] ...


Luke.


P.S. Get a longer Vid, that sounded pretty ace!
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2007 Kawasaki ZX10R :: 1998 Kawasaki ZX-9R - SOLD
1998 Yamaha FZS600 Fazer - SOLD :: 1994 Aprilia Pegaso 125 - SOLD

[pwntifex]

It's like bike porn .
Awesome look and sound mate.
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the warped one: This is a follow up from the thread 'my willy hurts'

[edd]

You got any further since our airbox modifiying the other day?
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Bluespark Automotive - Diesel Tuning for Performance and Economy

[nrml76]

Nice project.
What are going to do with the old zephyr engine? If you are selling the parts, can I have the right side timing rotor cover?

[palmer]

I agree, a stubby can on that would look way better

It looks a very nice bike

[proximity]