build a streetfighter

first timer · Jul 14, 2004

did the 750 motor fit in the 550 frame or did you have to do lots of mods to get it to work.

oh by the way good looking bike.

-ryan

80gs1000e · Jul 14, 2004

............8O Whoa, sweet 550

kieron said:
Thought I'd logon and show you the latest update to my GS550. Strictly speaking there isn't much of the GS550 left but thats what it says on the registration documents! :lol:

I blew the 550 motor last year and caused serious internal damage such that the logical step was to slip in a GSX-R750G engine. :wink:

Anyone know what the original bhp output was for the GS550? I think it was 45bhp but this one is 95bhp now! :twisted:

Paul · Jul 14, 2004

That's neat.

Anonymous · Jul 15, 2004

first timer said:
did the 750 motor fit in the 550 frame or did you have to do lots of mods to get it to work.

oh by the way good looking bike.

-ryan

Thanks. Work was done by Polygon in Gloucester, England. No modification to the frame was required to fit the engine but they made up some very beefy billet engine mounts and fitted a small riser plate at the rear of the tank to lift it clear of the engine.

first timer · Jul 15, 2004

thats cool, did you have to do any frame reinforcment? does the frame dlex at all under load, accel/cornering? what kind of carbs are you useing and how do they fit? on the 550 motor with cv carbs there isn't much room for air filter.

i ask all these questions in case my 550 ever goes south, and a gixxer 750 motor sounds real fun. do you have any diagrams of the motor brackets, like templets or cad files?

thanks,
ryan

Anonymous · Jul 15, 2004

Your right there isn't much room on the GS550. The ones I had needed a bit of trimming to fit.

http://www.imagedump.com/index.cgi?pick=get&tp=55585

The carbs on the 750 motor are the standard Slingshot carbs that come with the motor, 29mm flatslides, but I'm not using any filters. That may change though.

Still road testing the bike since the new engine install ie. short distances, building speed each time then checking mounts, bolts, oil etc. after shake down so haven't really pushed it to know whether it flexes or not.

Sorry no templates or CAD drawings I'm afraid.

80gs1000e · Jul 15, 2004

Whoa, what a difference! 8)

first timer · Jul 15, 2004

mcycle-nut · Jul 17, 2004

Cool 550 :wink: !

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