project floating tail starts...

[Chanse]

well just thinking about it (two rear calipers.) Ive seen some setups for stunt that utilize two rear brake controls for rear one foot and one hand, And also If you think about it two calipers would prevent lock up because the pressure normally sent to one is divided onto two, and you would have less pad wear. I still cant think of any reason to do it other than coolness factor or "bling". But if you look at the site it is bike metal CONCEPTS.... Their just trying new stuff, think of how much useless crap they try on cars and some of it actually works and catches on, no telling... I mean really look at some of the crap we do to our little $1000 to $3000 bikes. And we don't have any kind of outside motivation, IE.  advertisement, sponsors, or just to sell stuff.... But if its for advertising, it did its job you all seen it and now your talking about it.

[tt_four]

They do use them on stuntbikes so they have a back brake they can use with their left hand, but when that's the case they would have their own brake lines. Those two are hooked together like a front brake. Assuming that having 2 calipers would make each only half as strong would mean that there's absolutely no reason that every other bike nicer than the GS has dual front brakes. I don't know the details but I assume different levers push different amounts of brake fluid through. More importantly, aside from an occasional wheelie or burnout, nobody's doing stunts on a bike like that, so the setup is definitely a "just wanted to try it" situation.

[gregvhen]

dual front brakes is differant than this though cause dual fronts also uses two rotors and bigger rotors, where this is just one rotor with two calipers but that is not relevent to what hes saying. its does (or it should theoretically) help brake pad wear though because you no longer need to press as hard to get the same result due to the greater pad surface area.  the load is not divided in half, as in the duals still have to stop the same rotating mass (the wheel)  as a single, but the effort by the rider is divided in half.  so no it wouldnt prevent lock up because having dual calipers isnt giving you less stopping power, and no its not cause one is for stunt handbrake, but yea it should aid pad wear because theres more surface area/ less effort by rider.

[seamax]

some updated pics. Got the R6 shock in with shorter dogbones. Clean up the subfame. Will raise the subframe a little higher as soon as I get my propane torch. And then it's onto triangulating the seating area with tie rods.

[seamax]

since my next step is to bend the subframe up about .5" what kind of heat would you guys recommend? I was going to brace the area with wood blocks and use an propane torch to bend it up. would a propane torch provide enough heat or should I go oxy propane or even mapp?

[gregvhen]

propane would work....eventually.... id use an oxyacetelene torch quick and accurate 

[kyle_99_gtp]

haha yeah x2 on the oxy torch if you want fast heat. you'd just have to be careful you dont cut through the frame with it!

i think this is a sweet project, it's gonna look good. what kind of pipe is that by that way?

[gregvhen]

you want cut through without a cutting head. could melt through but thats unlikely if you have eyes

[dauphinc]

I was most definately wondering the same thing that kyle99gtp was wondering. What kind of pipe is this? I am making mine naked and doing this type of mod as well, from a 500f. The underslung exhausts are rather exotic and really attractive.

[gregvhen]

he got the pipes off some 4 wheeler and stuck a yoshi tag on em.  and made the red tips himself i think. pretty awesome exhaust

[dauphinc]

No shaZam!? That's pretty cool. However, I was wondering about backpressure losses/ low end torque. How has it changed?

[gregvhen]

not sure on that as its not my bike, but since no one else is replying, if i remember correctly i think he has a lunchbox on there with a rejet to make up for the easier breathing exhaust, not sure tho.  adn when you ask questions about "how has the lunchbox/pipe/rejet helped performance" you get so many answers its ridiculous

[dauphinc]

Not worried about performance. I can figure that out on my own. Just wondering about how true duels affected backpressures. Performance is mostly measured by the seat of pants by people, therefore I don't ever really believe it. I like numbers, ratios,etc. More torque feels faster but it's not; the dodge diesels (cummins) with tuned ecu's and exhausts feel fast; however, my 4.3 s10 waxed them.

[seamax]

Not worried about performance. I can figure that out on my own. Just wondering about how true duels affected backpressures. Performance is mostly measured by the seat of pants by people, therefore I don't ever really believe it. I like numbers, ratios,etc. More torque feels faster but it's not; the dodge diesels (cummins) with tuned ecu's and exhausts feel fast; however, my 4.3 s10 waxed them.

Pipes are atv carbon fiber pipes I picked up off ebay and I put a yosh sticker on them. I've seen some of these made for soccters too on ebay. I used red hose clamps to make the tips look larger and longer. It is not a true dual because I kept the H cossover member which I take also helps with the back pressure. But I have no back pressure problem. You probably just need to rejet probably to fix any air/fuel/pressure issues. I would say my torque is less/feels less not due to the pipe but because of the larger rear tire. I use to be able to do burnouts easily but now I have to rev her a little more.

[tt_four]

Hey what ever happened to this project?!

[seamax]

Well.......it's now a little warmer in Iowa.

I've bent the subframe to where I wanted it. I've triangulated my new tail with two sets of tie rods. They will not be seen since the tail will cover them. Found some turn led signals I like which would be mounted to the frame areas where I cut off the subframe support. This weekend I will be working on fabbing an undertail cover for the tail and sanding the the tank for a respray.

Will try to take some pics this weekend.

I will be relocating the battery to the tail enclcosure. Any recommendations on a seal battery that is less then 7x7x3 and under $100 which would work for the GS?

[tt_four]

How does the tail look where you cut off the bottom of the subframe? With a bit of grinding does it look ok? When I redo my subframe I wouldn't mind moving the bottom brace instead of re-angling the bottom rail, but I wasn't sure what it looked like after they welded it on there. Clearly the people welding these frames weren't the best.

[seamax]

Remember the bike is unleveled and off the ground about 2 inches..and the cardboard is my template for the undertail cover.

[gregvhen]

nice

[tt_four]

Progress is looking great as usual. If you paint those braces black I don't think you'll even see them. Can you weld? I think if you can you should try to fill those holes in the frame. They worry me. The GS doesn't exactly have frame bending torque like some bikes, so I'm sure you'll be fine, but still. You at least want to make sure they're completely covered so no water collects inside the frame.

What's your final plan for making the undertail? I'm going to have to try to make one soon too. I picked up some fiberglass sheets and resin from home depot so I'm gonna try making something once it warms up enough outside for me to try it out.