Zephyr 550 - Wrist Twisters
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post #1 of 8 Old 05-24-2012, 11:48 AM Thread Starter
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Zephyr 550

My brother bought a 1990 kawi zephyr 550 with 10,000 miles. This bike is mint! From what I've read it's considered a naked bike. It's a sweet nimble little bike. I'm wondering if any fellow WT members have had any encounters with this bike..We want to make it a bit snappier. The first thing considered was a sprocket and chain set with a more aggressive gear ratio. The stock setup is 16/41. Surprisingly, there a lot of sprocket set options on ebay. 15/43 stuck in my head. Also, his old bike was a 81 kawi kz 650. He put a vance and hines 4 to one exhaust on it awhile back. You think we might be able to put something together to swap out the exhaust? Jet kits are only $90 on ebay

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post #2 of 8 Old 05-24-2012, 04:23 PM
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post #3 of 8 Old 05-24-2012, 06:41 PM
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Had a 750 Zephyr and loved it, wish I never sold it.

I would think a GPZ550 header/pipe would work if you can't find one specific to the Zephyr.

The eccentric swingarm is the next best thing to a single sided swingarm.

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post #4 of 8 Old 05-25-2012, 01:20 AM
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Lovely bike. I get a horn over the wire wheel 1100 version. Almost purchased on years back......

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post #5 of 8 Old 05-27-2012, 06:20 PM
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First post from long time lurker.
I have a 98 550 Zephyr. As you may know this bike has the same engine as GPZ550 and a cam change woul see some more top end hp (from 50 to 70 I believe). In addition some pod filters and rejetting helps.
Kerker made some pipes for the GPZ that fit with minor modifications.
My recomendation is also to fit some better progressive (icon?) springs and decent oil in the forks as this transforms the bike. ZRX1200 and XJ1300 straight fit rear shocks is also a good mod.
I really like this bike and have trouble letting go even it has not been really ridden for a year. Check out 'zephyrzone' and 'all things 550', really good forums.

Cheers from a norwegian living in Melbourne, Australia riding a 04 919 and a 2012 Ninja 1000

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post #6 of 8 Old 06-01-2012, 01:29 PM
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I had a bike like that and wrecked it. I'm still upset about that! The gearing ratio you mentioned would give it a heck of an acceleration but not much top speed. If that's what you want, then you're golden. Deck the head and bump up the compression if you're into that sort of thing. The 4-2-1 Kerker setup sounds wicked cool, so that's a good thing. Of course some performance carbs would also add to the overall increase in power, and budget. In the end it's all about money.

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post #7 of 8 Old 06-14-2012, 06:01 PM Thread Starter
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The Zephyr

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post #8 of 8 Old 06-14-2012, 06:11 PM
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Ahhh, the memories! Looks good!

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