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Deadpowerful

Joined:

Aug 12

Posts: 2

Deadpowerful says:

Restricting to 33BHP

Hello. I was wondering about restricting a Kawasaki GPX 250 1994, as I have never looked into this before and I am not sure whether I have to go to a Kawasaki dealer or garage etc. Any advice would be appreciated! Also do I have to obtain a kit myself or would the dealer/garage get hold of it?

Cheers 

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  • Posted 3 years ago (29 August 2012 22:38)

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MarcusMarsh

Joined:

Aug 09

Posts: 2725

MarcusMarsh says:

GPX250

Stick it on a dyno - I don't think you'll find it makes enough power to need restricting. 

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AdieR

Joined:

Apr 08

Posts: 3042

AdieR says:

Is this

the one?

http://www.motorcyclespecs.co.za/model/kawasaki/kawasaki_gpx250r%2089.htm

If so, it runs at 45bhp. To restrict it, all you need to do is get a restrictor kit and install it (ebay), and get it dyno'd. You can choose to get it done by a garage, but they'll charge a price for it.

You don't legally need a certificate either (insurers might ask for one), despite what suppliers / fitters might tell you.

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Deadpowerful

Joined:

Aug 12

Posts: 2

Deadpowerful says:

Restriction

The bike is one of these:

It is 45BHP so I would imagine it would still be running at over 33.
I do know the legality of the certificate but as the insurance company I am going to use apparently wants one to insure me then I need  one.
Can you show me one of the restrictors as I cant fin any on ebay.
Cheers

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MarcusMarsh

Joined:

Aug 09

Posts: 2725

MarcusMarsh says:

GPX250

I still say stick it on a dyno first.  In those days a lot of manufacturers were a little 'enthusiastic' about the BHP figures they quoted.  I would be surprised if an 18-year old, highly tuned 250 was shoving out 45 BHP. 

I might be wrong but for the sake of a dyno run you could save yourself the trouble and expense of having the thing restricted.   

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bbstrikesagain

Joined:

Nov 08

Posts: 881

power to weight

Would need throttling down to 142*0.16 = 22.7kW = 30bhp under the power to weight limit.

Visit www.alphatechnik.de using Chrome browser (auto translation from German).  They do pretty much all the official kits.  They list kits for 26kW/34bhp GPX250 '88-89 and for the 35kW/46bhp ZXR250 from '89 onwards.  Check the chassis number prefixes - maybe the bike get's different names in different markets?

It can be cheaper to source the same alphatechnik kits via www.cheap33bhprestrictorkits.com, or a lot dearer through a dealer...  Kits include a certificate to be signed by a professional if you need one.

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