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Discussion Starter · #1 ·
Hey everyone...I'm thinking of building a 4/11 or a 5/11. I've only seen/heard of one other being built and that was some guy in South Africa. It was posted on GSXRhouse.com. Has anyone seen this done before? I just wanna know a couple of things. 1) What fabrications had to be made and 2) How much strengthing had to be done to the frame? I think he was using a 750 swingarm.

There's tons of GSXR 400's in the salvage yards here. I have one more year left in Japan...don't figure I will be back anytime soon, so I may even get a couple of rolling chassis'/frames to ship back with my furniture. Any help is greatly appreciated and pictures would be awesome.
 

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GSXR 50 ?????

that would be ausom for my kids to ride

where can i find one does any one have a picture of one???
jimmy
 

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Discussion Starter · #5 ·
I've never seen a GSX-R50 either. Then again...the lack of power the 400's and 500's have...maybe they should be renamed to GSX-R50.
Maybe I will take some photos of some of the bikes here on Okinawa and post them. Most of them are trash.
 

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The GSXR 400 is watercooled and a lot different to a 1100 oiler. I'd be very surprised if you could manage to get a 1100 motor in the 400 frame.
 

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the GSXR50 (GAG50 in Japan)was a 1987 only limited import to the US. It got blown away by the YSR50 (the GSXR50 was a 4 stroke) so was not imported agian.

I have heard of 600 and 750 SRAD engines in a GSXR400. The perimiter frame model would be easyer to adapt than the Beam frame but I think the limit would still be 750 due to the enging height. I would like to build a 4-6 for my son (he's 10) to race in a couple of years. But I will probably just take a TZ125 and stick a YZ80 engine in it first. That way I can switch back to a 125 after he learns.
Bones
 

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Discussion Starter · #9 ·
Yeah...I had emailed the one guy that had a photo posted on GSXR House, but he never got back with me.
I think I'm still gonna do it. May go this weekend to find a rolling chassis.
 

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I have seen a 750wp in a late model 400 it gets raced here in australia and its fast last time I saw it on the track it was wheelstanding past a r1 the 50's I think are called gags we have a few at my work we got out of japan they sell in australia for about $1200
 

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Discussion Starter · #14 ·
I'm going to the junkyard today to price one up. I rode by there yesterday and there was a frame w/ subframe (no triple tree) laying out in view.
 

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Originally posted by jeff:
there were one or two members on the now defunct r house that had done 4/11's.
<font size="2" face="Verdana, Arial">Those are the only ones I know of as well. I seem to remember a Yoshimura paint scheme on it...

You might want to contact Lee Sheirts in South Carolina...his Scud projects were well thought out and VERY fast. I know he put a Busa motor in a 600 the other year...but it wasn't easy.
 

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We have done several engine swaps in the past few years:

Water-cooled in a SRAD frame
Busa in a SRAD frame
900RR in an F2
Water-cooled in an oil-cooled frame
Oil-cooled in a water-cooled frame
Oil-cooled in a 4-wheeler
ZX9 in a ZX6
ZX9 in a ZX7
ZX11 in a ZX7

It always ends up being more work than it first appears. So unless you are equipped to do a substantial amount of fabricating work, you are probably better to just pay an experienced professional.
 

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Discussion Starter · #17 ·
Hmmm...good point. I think I will still grab a rolling chassis and take it back to the US with me. Maybe for my retirement years.
 

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Originally posted by DRAGON:
how much can you get a frame for could be nice for my 2 stroke project...
<font size="2" face="Verdana, Arial">What 2stroke project? I am planing on dropping a GT 750 engine into a 85-87 750 chassis. Of course I will not get started on this untill I finish re-doing my Streetfighter.
Bones
 

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Firstly let me say I know the guy with the 400 running the wp750 motor.
It's not a stock 750 motor it's the same spec as mine.We bought the parts at the same time and got a good deal.Though he bought the original motor from a wreck that I was looking at buying.

He dropped it bigtime at Darlington park raceway and wrote it off.

We race superbike lites and have got a 91 400.
So I know a little about these things.

You can fit an 1100 motor in them though you will need to make a new cradle.
Depending on the 11 motor you use you might need to make some rear engine mounts and definately gusset the frame around the steering head.

Your swingarom and 5.5 rim will fit we did this to the one we built.

I've seen 1100 motors in a 400 on the street it needed to drop the engine just to change the spark plugs.
My bet is you'd be better off putting a 750 fully worked engine in one.The 750 is a tad shorter and most of the engine mounts will fit.Plus you'll get 6 gears to play with and they are a lighter engine.The one we used in another project was a short stroke motor from an 89K running Rf900 barrells and pistons.It goes like a rocket.

They are scary and fun things to ride thats for sure.

Heres a pic of me on the 400 racebike we took for a test run on the public roads.


[ 11-21-2002, 01:25 AM: Message edited by: zameil ]
 
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