Project Chassis Choice

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evan_calgary
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Re: Project Chassis Choice

#31 Post by evan_calgary » Mon Apr 11, 2016 7:19 pm

I would agree that the welding aspect is likely tougher than just' buying a welder.' And certainly it can't be recommended to start with an item where weld racks could lead to death.

I have been looking fora motor for slingshot for some time and would consider throwing a RZ motor in there. It would absolutely have to run a full fairings though. The pipes will fit through the frame at the front but likely have to do some cutting to fit underneath.

Justin, If you find any more info let me know. If I can find a set of cases i would be willing to get started on this into a slingshot pretty quick and colab with you on info at least!

justind97
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Re: Project Chassis Choice

#32 Post by justind97 » Mon Apr 11, 2016 7:47 pm

evan_calgary wrote:
Justin, If you find any more info let me know. If I can find a set of cases i would be willing to get started on this into a slingshot pretty quick and colab with you on info at least!
I'll have a 2 spare cases hopefully by the end of the weekend I can ship. I'll want them back of course. But grey hound should be cheap

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Re: Project Chassis Choice

#33 Post by evan_calgary » Mon Apr 11, 2016 7:59 pm

Think I will likely buy a set as I don't currently have a motor for it (Oil Cooled 750 is beat and no 2-stroke motors right now). and then go from there.

Offer is much appreciated though.

RuZty
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Re: Project Chassis Choice

#34 Post by RuZty » Mon Apr 11, 2016 8:33 pm

giron wrote:I partially agree with you. The part I disagree is when you make it sound so easy for welding. The welding takes years of practice. A couple of good examples are RGVSteve and Brian Turfrey. RGVSteve is in his sixties. He was train in the Air Force and in high school. He worked in the Kennedy Space center and on the Shuttle program. That reflects years of experience especially what you are proposing for anyone to cut up a frame. Then we get to Brian Turfrey. Brian started when he was 15 and he progress and continue with racing bikes and doing pipes for his 250 team and the Kenny Roberts team. I realized my limitations because of my age. If I was younger I would like to know how to weld.
Absolutely. I have met Steve and he is exceptionally talented and a great personality as well. The fact that he is very familiar with modifying these old bikes is also a huge bonus. You don't build space craft for a living without being at the top of your game, that is why he modified the braking and steering components I am using. At the same time it doesn't take 10 or 15 years to be able to weld a motorcycle frame, but it does take regular practice and an understanding of how the metal behaves and what conditions lead to failures if you are going to modify something you plan to ride fast. I can weld well and I can machine parts, but I am neither a welder nor a machinist, as you say the key is to know your limitations and either work within them or seek to eliminate them. Natural selection will take care of those who don't.

justind97
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Re: Project Chassis Choice

#35 Post by justind97 » Mon Apr 11, 2016 9:15 pm

evan_calgary wrote:Think I will likely buy a set as I don't currently have a motor for it (Oil Cooled 750 is beat and no 2-stroke motors right now). and then go from there.

Offer is much appreciated though.

No problem. There's a set of cases for sale for $200 on kijiji Ontario

But banshee cases are way cheaper if you don't mind the chain whip, last I checked they were about $75us

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giron
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Re: Project Chassis Choice

#36 Post by giron » Mon Apr 11, 2016 9:20 pm

Its not only the ability to weld, but the engineering. On this thread they are talking about altering the neck of the frame. That is scary.
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

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RZResurection
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Re: Project Chassis Choice

#37 Post by RZResurection » Mon Apr 11, 2016 10:13 pm

RuZty wrote:
giron wrote:sometimes people get ideas in doing projects that they don't have the capabilities.
You get capabilities by having ideas and the passion to make them real. The important part is getting a deep enough understanding of what you are doing or knowing someone who does so that you don't suffer too much along the way.
Well said Ruzty! That's exactly how to build your skill set, skill level and confidence.
Jeff

Trying to build a bike that's as fast as my memories
87 Canadian 1WV
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84 FJ1100 Swingarm

RuZty
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Re: Project Chassis Choice

#38 Post by RuZty » Mon Apr 11, 2016 10:17 pm

giron wrote:Its not only the ability to weld, but the engineering. On this thread they are talking about altering the neck of the frame. That is scary.
I know what you are saying, a little bit of knowledge is a dangerous thing. There is a time to involve a professional, but doing so doesn't mean not educating oneself along the way. Changing frame geometry is not to be undertaken lightly, but it is also not impossible for a competent individual to learn the necessary skills. I think we are coming to the same point from opposite ends.

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2smoke
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Re: Project Chassis Choice

#39 Post by 2smoke » Tue Apr 12, 2016 12:16 am

evan_calgary wrote:I have a complete slingy that needs a new motor with upgraded USD front end sitting in my garage. Anyone have a link to a conversion?
I don't have any build info but here is where I saw it:
http://2strokebiker.blogspot.ca/2007/11 ... m-and.html
You could email the site owner for info.
The aircooled engine in the pic seems to fit nice, kicker clears, lots of room for YPVS components etc. above the engine.
Colin
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dinamos
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Re: Project Chassis Choice

#40 Post by dinamos » Wed Apr 13, 2016 1:24 am

Am I too far off base? On Erlenbachs site he has an RD 400 engine in a GS 500 frame with nominal frame notching, pipe mounting mods and final drive mods:

http://www.erlenbachracing.co/" onclick="window.open(this.href);return false;

roger

evan_calgary
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Re: Project Chassis Choice

#41 Post by evan_calgary » Wed Apr 13, 2016 2:50 am

Looking to stay full faired and a supersport style chassis. GS500 is a little too upright city cruiser for me. Excess rake and seat too low.

MK
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Re: Project Chassis Choice

#42 Post by MK » Wed Apr 13, 2016 7:25 am

giron wrote:Its not only the ability to weld, but the engineering. On this thread they are talking about altering the neck of the frame. That is scary.
I agree that I would not have chosen that particular location for welding. That was the customer's choice.

But I can ensure you that I have an engineer degree and successfully welded aluminum parts for bikes before.
All of them were used in race bikes (road and off road) and survived.
Even my very first rear subframe had no cracks and was just slightly bend after the bike flipped upside down at around 100 kmh.

My personal conclusions reagardind frame welding is that it is not that kind of rocket sience as most people think. But you need a good portion of talent/training/brains and it can easily happen that you bite more than you can chew.
Bye
Martin

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giron
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Re: Project Chassis Choice

#43 Post by giron » Wed Apr 13, 2016 10:05 am

I agree martin. Sometimes folks can get in over there limitations. That is the reason why I leave the welding to RGVSteve or Brian.
1991 3MATZR250SP
!993 3XVTZR250SP
1996 RGV250(Lucky Strike)
1994 MC28SP
1995 MC28SP
1996 MC28SP
1985 RG500(Walter Wolfe)
1984 IT490
1985 RZV500R
1985 NS400R
1985 NS400R
1997 VFR750
1992 FZR1000
RGV400
TZR500
TZR350
1990 RZ350
1971 Porsche911S

MK
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Re: Project Chassis Choice

#44 Post by MK » Sun Apr 17, 2016 4:21 pm

Just for completeness sake: here's the finished Franken-Frame ...
First off road test is scheduled for Wednesday. Press your thumbs.
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Bye
Martin

RuZty
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Re: Project Chassis Choice

#45 Post by RuZty » Sun Apr 17, 2016 9:05 pm

MK wrote:J Press your thumbs.
German version of 'Cross your fingers' ?

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