zx670
Extreme
I have been working on this one for a while now, wanted to see what you can get an apex weight down to and im impressed so far, have an rx engine in the chassis since I have a couple laying around and the apex engine needs a crank. no obviously I dont have the side panels seat or hood on it yet but its otherwise complete minus fluids. no titanium was used but plenty of 4130 chromoly and 6061 aluminum. turbo is rear mounted but since the tank is mounted further forward I put the turbo as far forward as I could so using the stock headers and its only 26" from engine to turbo, exhaust is not exposed to the tunderside of the tunnel so shoul retain heat better. turbo dumps into the tunnel through an instercooler I made mounted in the tunnel and pops back out by the chaincase. Rear skid I made using ice age rails, and some modified stock yamaha rear parts and some floats, only weighs 40lbs, track is a 174x2.5x16. front susp I came up with, super light. steering I moddified to be more like a nytro, close to the same geometry.
Attachments
zx670
Extreme
Ski-Dooin' it
Expert
thats freakin SICK!!!
love it man, I appreciate nothing more then seeing people going outside the box, and forward converting an apex chassis like that is really cool. love to see what it all ends up lookin like with plastic on it.
one off sleds built by hand are something to be proud of. good work.
love it man, I appreciate nothing more then seeing people going outside the box, and forward converting an apex chassis like that is really cool. love to see what it all ends up lookin like with plastic on it.
one off sleds built by hand are something to be proud of. good work.
zx670
Extreme
thanks, I am really up in the air on what to do for side panels, the stock apex panels are really a poor fit, thinking rev panels with a custom mesh hood but im also considering leaving it all open and just building a cover over the clutches
Ski-Dooin' it
Expert
lets just say, seeing you from wyo. I know what your gonna want to do.
I ride in mt and build a little monster myself, tis season i mashed some pannels and build mesh stuff, it doesnt meet up with the stock sidepanels that well, and it show,s snow fills the thing up when its deep out, so take your time and make sure WHATEVER you do, seal it up well.
I ride in mt and build a little monster myself, tis season i mashed some pannels and build mesh stuff, it doesnt meet up with the stock sidepanels that well, and it show,s snow fills the thing up when its deep out, so take your time and make sure WHATEVER you do, seal it up well.
DoktorC
TY 4 Stroke Master
That is VERY cool...it's almost a shame to cover all the coolness up...
Yikes where do you plant your butt? at least the turbo will keep you warm. Awesome build though. Cover what you need to and let the rest run naked 
I am finally working on the project 03 mtn with a bender turbo took my first ride last night with the wick lit "YAMMMA HAAAAAAA"
Now that it runs Im thinking new running boards, mesh front end and bigger meat than the stock 151.
I am finally working on the project 03 mtn with a bender turbo took my first ride last night with the wick lit "YAMMMA HAAAAAAA"
Now that it runs Im thinking new running boards, mesh front end and bigger meat than the stock 151.
kinger
VIP Member
I love the use of stock parts and chomoly, nice job. Hope it runs and works the way you hope it will.
zx670
Extreme
yeah i had some of the stock yamaha rear susp parts in my hand ready to remake them out of aluminum and or chomo, but after weighing them and doing some math it only came out to be a few ounces I would save if I made new parts, not worth the effort and the stock parts and geometry I know works well.
I borrowed some doo rev side panels last night and they appear they would be a good fit, gonna play with them a little more as I can get a set for free along with the nose cone, and belly pans to try fitting.
I borrowed some doo rev side panels last night and they appear they would be a good fit, gonna play with them a little more as I can get a set for free along with the nose cone, and belly pans to try fitting.
mmmkokanee
Expert
That thing is awesome! 
powder muncher
TY 4 Stroke Junkie
Nice work
Make sure to wrap that header---mine is glowing red from the first pull until you shut here down.
Header wrap and silicone header spray saved my but in the heat department.
Cheers.................
Make sure to wrap that header---mine is glowing red from the first pull until you shut here down.
Header wrap and silicone header spray saved my but in the heat department.
Cheers.................
zx670
Extreme
I am ceramic coating the entire header and wrapping it, hope thats enough, hate to melt the tank and loose fuel over a hot header!
I suppose I could also ceramic coat the heat shield under the tank so it doesnt transfer as much heat to the tank, hmm,
I suppose I could also ceramic coat the heat shield under the tank so it doesnt transfer as much heat to the tank, hmm,
kinger
VIP Member
Were you weighing stuff as you removed it? I'm wondering if you have insight to the heaviest stuff and other items that you did to get it down to that.
I'll be interested to know what it is full of fuel ready to ride with plastics. I had it in my head that you could only get a 4 stroke down to 550lbs wet full of fuel with MAJOR chassis surgery, otherwise most go over 600-700lbs.
I'll be interested to know what it is full of fuel ready to ride with plastics. I had it in my head that you could only get a 4 stroke down to 550lbs wet full of fuel with MAJOR chassis surgery, otherwise most go over 600-700lbs.
zx670
Extreme
I did not weigh everything on scales, but the front suspension and steering alone was a 50lbs savings from the stock stuff, that area was the biggest weight saving of anything I did.
I have been maching a lot of bolts and etc from 7075 aluminum hex stock. and the rear skid, its just under 40lbs fully assembled, using the stock header was 15 lbs lighter than my previous mid mount header. most has been just a lot of small items here and there I made or machined out of billet to replace small brackets, bolts, etc
I should have the plastic mounted this weekend and a start on making the seat, should be able to get some closer weights soon but I dont imagine the dry weight will come up much above 450, which should put the wet weight in the 530 range
I have been maching a lot of bolts and etc from 7075 aluminum hex stock. and the rear skid, its just under 40lbs fully assembled, using the stock header was 15 lbs lighter than my previous mid mount header. most has been just a lot of small items here and there I made or machined out of billet to replace small brackets, bolts, etc
I should have the plastic mounted this weekend and a start on making the seat, should be able to get some closer weights soon but I dont imagine the dry weight will come up much above 450, which should put the wet weight in the 530 range
sledneck22
TY 4 Stroke Junkie
Can't wait to see the finished product. This sled will rip!
