Pursuit of a track Moto (My first track day build)

[RowdyRhody]

Once I got to this point I moved onto doing something ive wanted to do for a very long time. In 2018 i had the idea to make the seat frame a sperate subframe. I was unaware at the time that KTM did this in 2017 with the duke 390 and 2019 with the rc390. It would be much easier to buy one of those bikes...alas i have a 2017 that i already own, so I set about designing/ fabricating a rear subframe from aluminum that would bolt to the steel via 4 mounts. I used PVC pipe with similar outer diameter as a 1996 gsxr 750 aluminum seat frame i have that i referenced for material thickness/size to build mine. it worked out really well. During this process i also began sketching and taking measurements to make a reference 3d model to work off of. I want to build an entirely new tail section but also redesign the front fairings to be more of a half fairings style... moto 3 bikes have a completely carbon rear section. my budget/time doesn't allow me to do this right now, as well as I'm sticking with the idea of running a single undertail exhaust and mounting it to carbon seems tricky.. as well as working on the frame mounts so my tail will have this trellis aluminum frame that holds the seat and exhaust up and is then covered by a fiberglass seat that will tie into the rear tank cover as one piece.
SEAT FRAME




Fuel tank pump mounting bracket needed the filter holding tab removed..


I cut up and reorganized the 2017 battery tray to fit under the rear tank fairing, plastic welding it back together its pretty solid. This will house the battery/ecu/power commander v/fuses/relays and other various electronics and sits on top of an aluminum plate i cut/bent to fit in.

 

[RowdyRhody]

MOST CURRENT EXAMPLES OF FAIRING/TAIL DESIGN

 

[RowdyRhody]

FOAM MOCKUP

Will probably take me one or 2 more tries to get this seat foam shaped correctly...

 

[RowdyRhody]

SEAT FRAME CONTINUED
Ive never welded aluminum before or fabricated a piece like this but i went for it. Still need to finish a few spots in the tight angle tube intersections and add tabs for mounts/smooth some edges but I'm stoked how its come together... ive wanted to do this for years.


I think my fat ass standing and bouncing on this thing at the best point of leverage is as good a stress test as any

 

[RowdyRhody]

Today i stripped everything down again and gave the frame a half assed paint job along with tabs i extended on the fuel tank...


There's a lot more that i just haven't written as I'm tired right now and just want to get out the updates. Lots of photos too.. ill probably proceed in this way of mainly photos with a few bold text titles and short descriptions. Thanks for any interest/questions/comments i hope you guys find something interesting in my project. Today was the first track day/racer practice for penguin and NEMRR so I'm a little disappointed that im not there but ill push to make round 2 may 18th... Its been about 3 weeks and I'm happy with the progress I've made.

Adreani front fork kit is sitting on my workbench waiting to go in, im considering a new rear shock.. if anyone knows of an affordable WP or Ohlins please let me know! Formula 390 has a new sprocket setup for the 415 chain/better gearing for my track. Ill hopwfully test the wiring harness soon after cutting out so much and if its good itll get fully wrapped up and in place. Depending on budget there will be some other cool parts going on...
until next time!

 

[RowdyRhody]

So far this week I got the engine back into the frame and some pieces bolted up. also realized i didnt have a good photo of the seat frame...

Unfortunately these super annoying fuel lines kinked on me over multiple times moving the fuel tank so I've got a 2023 set coming, the newer models use traditional rubber with crimp clamps thank god.

Check this out! I welded closed the radiator thermostat line and removed the thermostat hose setup. Tyga has a clamp on cap for this and a hose for the upper radiator but i went into AutoZone and found this hose that fits PERFERCTLY. left the part number 87858 on there for you guys. Not only does it clear the frame rail and line up with it without kinking, one end is a 5/8" for the radiator and the other is about a 3/4" for the head, like it was made to be!