2008 Nytro build time!!

[kennyspec]

Hey all i just picked up a 08 nytro MTX with 4000kms. Seems to be in good shape. Has a MBRP pipe on it. and a 156x2.5 challenger track. I am looking to shed every ounce that i can off of it and improve on a few things and turbo it over the following summer.

Boredom has set in while waiting for the snow so i started tearing it apart. I am going to get a ACCURATE weight of it before and after to see what can really be shed off of these things.

so far i have removed all this crap.

Planning on replacing the rad and the stock tunnel heat exchanger with some full length ones from CR racing. Should keep up with the cooling demands....hopefully lol

Also my next issue was the steering. I didnt like the "near horizontal" steering post. I had looked at other ppl's builds on here and someone was going straight down to the final bellcrank (right terminology?) at the bottom of the sled and i really liked that idea. Problems with this is having to make a entire new steering post and make a new bellcrank mount as it is on the wrong angle if the shaft is straight from the upper mount to the bottom. Also the shaft is right in front of the middle TB so that is another problem in itself.


STOCK

Steering placed near the bottom "bellcrank"

THis is a MUCH better angle but while sitting on it the bars felt a little far away and way too high. I could cut down the riser or get bars with a bit more sweep back but not right now.

So i think the answer will be......Taking the steering shaft from a Polaris Confusion. (who knew they were good for anything. lol)

planning on mounting it just under the stock lower mount and shortining the Tie rod going to the lower bellcrank thingy. (still do now know if bellcrank is the right term)

that gives a final angle of this......

with the U joint in there it gives you almost the same angle of mounting it to the bottom bellcrank but i think it will be a lot easier to mount.

Also looks like it will clear the K&N filters i plan on using.

I know in this pic it looks like the steering is tilted pretty bad to the right. It will have a SLIGHT tilt to the right, not as bad as in the pic but it will be there. The confusion had a much worse side tilt to the steering and it wasnt really that noticeable. maybe i can move the top mount off to the left just a hair to help with this.
Either way i think it will be a much better steering angle and i will have a lot easier time mounting the INTERCOOLER and intake plenum for the turbo setup

 

[kennyspec]

upon further inspection it seems as if it will work better with the shaft upsidedown. this puts the u joint well above the filters and still seems to give a good steering angle.

 

[kennyspec]

wow no replies yet lol

I wanted to do this without cutting/moddig any of the stock brackets but that just isnt going to happen. Last night i cut off the stock lower steering shaft mount, removed and filled the 2 long bolt holes, redrilled it and flipped the bracket. then welded it back on under the top shock brace.

I had to weld it back on while standing with my head upsidewown. Would of been a lot easier to remove the subframe, but a lot less work this way.

turned out ok for welding upside down i think. I hope to get the upper mount finished tonight.

 

[Mazz]

Looking good, very interested to see how that steering post works out.

 

[kennyspec]

worked on the middle mount tonight. got it tacked tacked up and test fitted the K&N filters.

i still need to weld a flat plate to the middle mount tube.

 

[rlcofmn]

You're using a TIG, so I like it.

 

[NUKNUK]

sick

 

[Sportsterdanne]

Nice work ! I really like all the Nytro mods that are popping upp !
But try to have the planned turbo build in your mind before welding it all up so you dont have redesign and rebuild the steering again when adding the charge tube/plenum.

 

[kennyspec]

Intercooler will either be mounted in the tunnel or in the front of the sled above the steering rack. I am planning on building short "runners" from the TB going up into the plenum that will sit on top of the steering shaft. Was even planning on using that middle mount crossmember i made as a mount for the plenum. This isnt my first time turboing a 4 stroke. my photobucket wont seem to upload so i will just add a few pick on the site. This is how i will prob be routing the heat exchangers. Yes i know it is not optimal, but with one on each side it almost completely closes off the tunnel opening for the turbo. There will be a pipe going back to the front of the sled from the short heat exchanger piece that goes across the tunnel. still debating on weather to ditche the stock MTX cooler or just mod it and connect this aftermarket stuff to the rear of it.

 

[kennyspec]

worked a bit more on the middle seering post mount. Got the bracket tacked on and started welding up the rear heat exchangers.

 

[kennyspec]

Little more work on the sled last night. I got the middle steering mount welded up.
while i had the handlebar frame out to weld the mount i also fixed one of yamaha's welds lol.

FACTORY WELD

FIXED

It turns out the stock steering shaft is the same diameter as the fusion one so i chucked it in the lathe and took off the steering stop in hopes to using it on the fusion shaft.

I may also use the stock tie rod mount on the fusion shaft.

 

[kennyspec]

got everything tacked together, looks like it should work out awesome. Looks to be the same angle as my phazer!

 

[kennyspec]

kept going on with the heat exchangers. I am not 100% satisfied with the routing but i will have to take care of that over the summer. For now it should work for the winter.

remember they are upsidedown in the pic, so when mounted in the tunnel the 1" tube will be on the right side and should exit through the stock holes in the bulkhead.

 

[sonds]

You should work on getting rid of those running boards next

 

[kennyspec]

They will go over the summer. Along with the rest of the tunnel.