Need some help / advise on my Gixxer Kart - GSXR.com
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post #1 of 11 (permalink) Old 09-01-2017, 04:32 PM Thread Starter
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Need some help / advise on my Gixxer Kart

Hey guys, I'm a new member and first and foremost my hays off to you seasoned members! You guys are a well of knowledge and I've already solved a few of my issues just by reading your past posts. So thank you for that. Also, just to be upfront and transparent, I don't ride a bike. Maybe someday I'll get one but working as an Insurance Agent and knowing actuarially underwriters find the chance of being injured on a motorcycle to be 100% (hence the fact we don't offer medical coverage on motorcycle policies) coupled with my nature to be a bit of an adrenaline junkie, I feel I'm better off on 4 wheels rather than 2. That and a client of mine, who was the owner of GT bicycles was killed on a motorcycle early on in my career. Richard was the poster child for safe riding. Very conservative and by no means the type to showboat or act recklessly at all. Then one day while riding up to Big Bear was side swiped on a turn and at 40mph or so was thrown straight off the side of the mountain. Guy had millions in the bank and nothing to do but enjoy the rest of his life and then he's gone. I delivered his life insurance check to his widow and at that time I decided I'd probably never own a motorcycle. So I got the next best thing.... a 2003 GSXR750 with 23,000 miles with a cracked frame for $750! And am in the process of turning it into a Gixxer Kart. LOL!




OK, my last and final issue is this...

I've built the kart itself. Used 1 1/2 x .188 square bar to ensure an overly strong frame considering it's capable speed. Got steering, brakes, motor, everything pretty much dialed in. Picked up a paddle shifter set up and was able to make a bracket to adapt it for this build...



What I can't figure out is the best way to adapt the rear sprocket. Obviously the GSXR mounts to the wheel it self where as on a kart set up it mounts to the axle via a key way set up.



The sprocket hub has a 5 1/4" 6 bolt pattern where as the stock sprocket uses a slightly bigger bolt pattern with no key way.



I've seen a few members on here that say they have Gixxer karts and have messaged a couple with no response. Any and all ideas welcome.

Thanks for your time!







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post #2 of 11 (permalink) Old 09-01-2017, 06:18 PM
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Welcome and good luck with you project.

You did not mention whether you ever rode and enjoyed a motorcycle. It's a pretty complicated balancing act of mind and body so no, it's not for everyone and yes, there are risks to be faced.

Unfortunately, people die all the time in tragic ways. What about the Segway creator running off the cliff? That was bizarre.

BTW, google "man killed in go kart". I didn't even realize there were that many go karts out there.

These guys did a whole study and paper on go kart accidents. Interesting.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2847818/

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Last edited by rv6john; 09-01-2017 at 06:20 PM.
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post #3 of 11 (permalink) Old 09-01-2017, 06:39 PM
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Quote:
Originally Posted by HOTT_SINCE_81 View Post
Hey guys, I'm a new member and first and foremost my hays off to you seasoned members! You guys are a well of knowledge and I've already solved a few of my issues just by reading your past posts. So thank you for that. Also, just to be upfront and transparent, I don't ride a bike. Maybe someday I'll get one but working as an Insurance Agent and knowing actuarially underwriters find the chance of being injured on a motorcycle to be 100% (hence the fact we don't offer medical coverage on motorcycle policies) coupled with my nature to be a bit of an adrenaline junkie, I feel I'm better off on 4 wheels rather than 2. That and a client of mine, who was the owner of GT bicycles was killed on a motorcycle early on in my career. Richard was the poster child for safe riding. Very conservative and by no means the type to showboat or act recklessly at all. Then one day while riding up to Big Bear was side swiped on a turn and at 40mph or so was thrown straight off the side of the mountain. Guy had millions in the bank and nothing to do but enjoy the rest of his life and then he's gone. I delivered his life insurance check to his widow and at that time I decided I'd probably never own a motorcycle. So I got the next best thing.... a 2003 GSXR750 with 23,000 miles with a cracked frame for $750! And am in the process of turning it into a Gixxer Kart. LOL!




OK, my last and final issue is this...

I've built the kart itself. Used 1 1/2 x .188 square bar to ensure an overly strong frame considering it's capable speed. Got steering, brakes, motor, everything pretty much dialed in. Picked up a paddle shifter set up and was able to make a bracket to adapt it for this build...



What I can't figure out is the best way to adapt the rear sprocket. Obviously the GSXR mounts to the wheel it self where as on a kart set up it mounts to the axle via a key way set up.



The sprocket hub has a 5 1/4" 6 bolt pattern where as the stock sprocket uses a slightly bigger bolt pattern with no key way.



I've seen a few members on here that say they have Gixxer karts and have messaged a couple with no response. Any and all ideas welcome.

Thanks for your time!






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I'd take it by a fab shop, you'll probably have to have someone CNC a mount for you. I'd take the cart axle with you and old sprocket carrier.
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post #4 of 11 (permalink) Old 09-02-2017, 02:38 PM Thread Starter
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Yeah that's kinda where I'm at with it.


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post #5 of 11 (permalink) Old 09-02-2017, 03:09 PM
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Cool. The sprocket has a rubber drive behind it I believe. You might want to consider encompassing that into your drive assembly how ever you mount it. With two wider flat tires I think you are going to end up with a larger total contact patch and there for possibly more "grab" on launch. The cushy rubber will help ease the strain on your engine and chain.
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post #6 of 11 (permalink) Old 09-02-2017, 03:46 PM
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Not a good shot of the bike, but are you sure it's an 03? Kinda looks like an 04-05 to me.
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post #7 of 11 (permalink) Old 09-04-2017, 07:38 PM
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Hello there and welcome to the site!

Nice project you have going there.

4 months ago, I came close to killing myself- accidentally on my K5 Liter Bike- thanks to State Farm and having been fully insured, with medical insurance- you'd think I had my medical bills covered?
AND- the fact I AM a medical provider- a PA-C; makes no difference. I keep telling the people I am arguing with on the phone that I can't believe my patients have to go thru this crap.
I did use the money to buy another low mileage, neat mint K5 Liter! AND bought the salvage back, which I'm fising and selling also.
Frame/wheels NOT bent- long story

Anyways, I have treated MANY- 4 wheeler accident victims of various injuries- minor AND major-
perhaps the belief that they are safer on 4 wheels? Maybe they are, and I'm not in any way trying to influence your decision- a sane one btw.

You have a really nice project going there- just be careful 'cause you strapped a 'rocket' to it to power it!

Stick around, and for sure post pics of your progress!

* Edit- to answer your question- you already have the sprocket mounted on the Axle. Any idea what size/pitch is that, or was on the bike you're using as donor? It's often stamped on the chain and/or sprockets. If you'vce aligned the countersprocket right, should link up? Are you using a 'jackshaft', like the wider rear tired bikes have to? How will you keep the chain tightened?
I agree that the 'bushing' in our wheels is there for a reason. You could get by without it.
Have you figured out any gearing? With the smaller wheels, you'll be winding up really quick

I think we need more pics too!

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Last edited by Todd_Sails; 09-04-2017 at 07:46 PM.
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post #8 of 11 (permalink) Old 09-20-2017, 11:21 PM Thread Starter
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Quote:
Originally Posted by Chuckster View Post
Not a good shot of the bike, but are you sure it's an 03? Kinda looks like an 04-05 to me.


Pink slip says 2003. Could have had mis matched parts on it though.


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post #9 of 11 (permalink) Old 09-21-2017, 09:56 AM
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Not that it matter much in your case, but I'd check the numbers on the bike. I'm almost certain that's an 04-05. Where it would help you is for technical information/parts.
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post #10 of 11 (permalink) Old 09-21-2017, 01:10 PM
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I think Chuckster is right. 03 didn't have a black frame, or that color tank. 04 also has radial brakes. Maybe you have an early manufactured 04 registered as an 03. Or maybe wrong paper work?
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post #11 of 11 (permalink) Old 09-16-2019, 11:56 AM
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Paddle shifter

Does anyone know where to buy the paddle shifter that has been pictured in this thread?
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