Aftermarket Frames - Thoughts? - ZX6R Forum
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post #1 of 16 Old 03-02-2017, 09:28 AM Thread Starter
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Aftermarket Frames - Thoughts?

Hi folks, I've got a spare bike's worth of parts laying around and I've been slowly accumulating what is missing to start on a build to make an urban assault bike. The only problem is I've been having some trouble locating a straight frame that has a title.

So, a while back I stumbled upon vendor that builds aftermarket stunt frames that come with a VIN and paperwork. So I've been putting a little more thought into going that route for a few reasons:

1. Brand new frame so no worries on the condition or straightness.
2. Looks cool
3. Easier than trying to track down a stock one in decent condition for my year of bike (03/04)

Obviously there are some differences, but I'm not thinking any of the differences would have a significant impact on the functioning. But thoughts are welcome.

This is what I'm looking at.

http://stunterx.com/s/products/stunterx-motorcycle-stunt-parts/stunterx-full-steel-frames-2/

Anybody ever used their stuff or heard anything about it?

Thoughts?
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post #2 of 16 Old 03-02-2017, 09:52 AM
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Thoughts from someone who doesn't know much about these things:

1) That looks bitchin'

2) What about the intake plenum that usually goes through the frame? That might not matter for poppin' mad wheeliez, but not when you want to maintain that factory tuned airbox. It might not matter for what you want to do with the bike, but that was the only thing that really came to mind.
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post #3 of 16 Old 03-02-2017, 09:57 AM
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Interesting...I was unaware of that entire market! Do they mimic the stock steering geometry? Or is it designed for the needs of stunting? Does that even matter to your "urban assault" goal?
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post #4 of 16 Old 03-02-2017, 10:00 AM
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I've always wondered if those steel stunting frames could be used to replace track bike frames if they are bent. I think they look awesome.

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post #5 of 16 Old 03-02-2017, 09:40 PM
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I like the look of those stunt frames. I would say, if it fits your purpose, then go for it!

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post #6 of 16 Old 03-02-2017, 09:47 PM
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MoM, you might as well go big or go home. By yourself a tube bender, a welder, a bandsaw, and a bunch titanium tubing and have at it! Make yo'self a custom titanium frame to your liking!
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post #7 of 16 Old 03-03-2017, 12:22 AM
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My first concern is with corrosion..... powder coat over bare welded steel is not a long term solution. That's just a cosmetic treatment. If they can't dip the frame and electroplate it, before the powder coat, it will start to rust inside out. All welds do this to some degree. Do they offer any plating options? Can you buy it plain, and get it dipped, then coated yourself?

Second concern is their manufacturing accuracy. Something that is thrashed in a lot, May not need to be as stable in a straight line. How well do bikes with these frames behave on the street?

Bikes have had steel tubular frames for over 100 years..... it's a great material for the application. The devil is in the details.

A split frame will potentially flex more than an OEM frame.

As long as you don't expect the same handling as OEM at the track, this may be a viable option.

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post #8 of 16 Old 03-03-2017, 12:17 PM
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As long as you want to stay free of fairings, I would have to think this is a better option than a clapped out, potentially cracked salvage frame/etc. Obviously, all of the attachment points for OEM stuff are probably not going to be there, unless someone with a welder decided they wanted it to be in place. Does the OEM tail section bolt on where it used to? Does that carry the battery, ECU, R/R on your model?

Any idea where the wiring harness should route? (it would be really cool if you could use the inside of the frame for that....)

The steel will likely be heavier than the aluminum, but a heck of a lot more durable. It really comes down to how well they brace the thing where it matters -- at the steering neck, and in the area of the swing arm pivot. Trying to keep those two points in the same spatial relationship as they have at a standstill, is the art of frame construction.

In the 1970's Triumph used one really big tube to connect the swing arm pivot area to the steering neck, similar to what Confederate is doing with their bikes -- if the tube is big enough in diameter, it will be stiff enough to maintain the location of the steering neck and swing arm pivot.

The whole reason that the twin spar frames were developed was due to the increase in power, and traction that started twisting the simple steel frames so much that they became evil handling pigs at the limit.....

if it's meant to be a street bike in moderate use, I'd think a stunt frame should be fine for that.

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "

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post #9 of 16 Old 03-13-2017, 12:58 PM Thread Starter
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Quote:
Originally Posted by sbk1198 View Post
MoM, you might as well go big or go home. By yourself a tube bender, a welder, a bandsaw, and a bunch titanium tubing and have at it! Make yo'self a custom titanium frame to your liking!
Lol! I wish! As is I don't have the skill or shop space to do that. This bike is gonna get pieced together in my living room or on my patio.

Some very good points of consideration here. I appreciate all of your thoughts and responses. I haven't been able to really dig into research for this yet, but I plan on talking to the builder about my plans and I'll bring these questions to the table. I don't plan to do fairings on this bike but I'm likely going to have to do an aftermarket subframe too, looks-wise. It will probably end up looking more like a Monster.

I'll keep this thread updated as I do research. And as I start building.
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post #10 of 16 Old 03-13-2017, 01:28 PM
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Do it right.

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After you build it in your living room you can give it a shot in Moto2 =)
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post #11 of 16 Old 03-13-2017, 02:03 PM
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I've heard they hold up really well with constant drops and abuse compared to factory frames especially around the engine mounts. The factory mounts would stress crack and people were having to brace them with extra aluminum and a lot of welds.
I remember people were sending in their factory frames for a while and having the lower ends cut and attached to the upper part of the steel frames but I don't really know if anyone is doing that anymore.
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post #12 of 16 Old 03-14-2017, 08:20 AM
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Quote:
Originally Posted by PainfullySlo View Post
Do it right.

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After you build it in your living room you can give it a shot in Moto2 =)
^^^ this


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post #13 of 16 Old 03-14-2017, 08:21 AM
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^^^ this
If I ever tweak the frame in my bike, that will be the replacement.
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post #14 of 16 Old 03-14-2017, 12:41 PM Thread Starter
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Hahahahaha well. Maybe I'll just build a race bike and then use my old frame for the hooligan bike.
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post #15 of 16 Old 03-14-2017, 12:43 PM Thread Starter
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I'd have to commit myself to racing though and I just can't make that kind of commitment with so much other cool shit in the world that needs to be experienced.
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