CR500- Road Race bike

Discussion in '2-Stroke Machines' started by JTRC51, Aug 31, 2015.

  1. ck.mecha

    ck.mecha Well-Known Member

    What glass is that from?

    Sent from my VS995 using Tapatalk
  2. 418

    418 Expert #59

    I'm no engineer but that swingarm looks way bigger than what the chassis can handle. Might wanna brace that frame.
  3. Sweatypants

    Sweatypants I am so smart! S-M-R-T... I mean S-M-A-R-T!

  4. Sweatypants

    Sweatypants I am so smart! S-M-R-T... I mean S-M-A-R-T!

    there's a big engine bracing it in a bunch of places normally? haha

    really tho its not that much to it, its just plated. tube stock to make the outline with only like 2 or 3 brace bars in it. was just plated to seal it up and welds grounded smooth. also there's already beefier parts of the frame due to mods to fit that motor. but yea like this:


    but covered. we'll see i guess.
    418 likes this.
  5. jksoft

    jksoft Well-Known Member

    Hey Sweatypants,
    What are you doing for an air intake on that beast?
  6. Sweatypants

    Sweatypants I am so smart! S-M-R-T... I mean S-M-A-R-T!

    as of right now here's the thinking...

    on the 11' frame, the shock support beam gets in the way with this motor of tucking a carb in the normal spot. so i think we're gonna have a plenum do a smooth 90* bend and have the carb facing out the left side and sit right above the front sprocket area. along those lines, i have heard now the Smartcarb works best with a 2-3" straight tube intake before the carb inlet (instead of the normal S-swooped stock intake from the quadzilla). so i'm thinking, angle carb facing slightly forward, intake tube/filter along the inside of the left fairing in front of my leg. then as a last piece of the puzzle, thinking of making a carbon snorkel from the huge front fairing nose inlet, and not making a sealed box, but having a ram-air tube run down the left side of the fairing and point right at the carb.

    that's the idea anyways for now. we'll have to see how it all shakes out when the engine is back.
    VFR#52 likes this.
  7. jcivince

    jcivince Well-Known Member

    Any updates?
  8. Sweatypants

    Sweatypants I am so smart! S-M-R-T... I mean S-M-A-R-T!

    On mine? No. I can't even get a call back from the engine builder. He could be dead with all my shit for all i know.

    I bought another motor and frame and am starting a 2nd project while i wait caaaaause... what the fuck, right?
  9. jcivince

    jcivince Well-Known Member

    you know it - seems like one can never have enough projects laying around! So what are the parts (frame/motor) on the 2nd one? And follow up to that is why did you choose those? I really like the idea of this but know zero about dirt bikes...
  10. Sweatypants

    Sweatypants I am so smart! S-M-R-T... I mean S-M-A-R-T!

    short: RS250 chassis... Vdue motor.

    long: i chose them because... the motor is dope as shit (i wanted something multi-cylinder, 2-stroke, dry clutch, 120whp+) and i know its fits well into an RS250 already (there's already a few out there) and i wanted a GP type chassis to go off on the next one and make super light and super bonkers... SBK forks, carbon wheels, carbon body work, GP brembos, AIM telemetry, etc etc the works...

    - TZ's are kinda expensive and hard-ish to find. rolling chassis even harder to find, bare chassis and tank stuff command primo prices for 4TW/5KE models.
    - Honda RS250R's are small and i don't think i would really fit on it (5'11", currently like 215lbs., should be like 185lbs.) and also expensive and parts are hard as crap to find. chain on wrong side.
    - I actually found Mika Kallio's 2007 KTM 250GP chassis for sale, but i also feared that would be too small (he is tiny), plus it had no shock, and no information on even what measurements were for things. no setup or geometry info at all, no forks or wheels. it was expensive and i'd be having to one-off almost everything for it, calling Ohlins with my fingers crossed hoping they'd help me or have some past info on file from the team that they'd even share, plus carbon body work that nobody is replicating. i decided against that. Can provide a link if anyone's interested.
    - Considered an ex-Moto2 bike for a sec, but the cheapest ones are often junked up a little OR they take off the really good parts for mid-level parts before they sell (ie. billet Ti brembos for regular M4 or GP-RX brembos, FGR forks for R&T forks, 2D full dash replaced with mini-dash, stuff like that). AND again... body work often hard to replace (some replicas now depending on what you buy) and gas tank would most likely be unusable (underseat where exhausts would be going) which is a shame as such an expensive bespoke piece, engine would be sold for almost nothing (who cares about a CBR600 motor that's been ran hard?). seemed like a bad idea in the end unless i was just going to leave it alone and run it as is.
    - Aprilia RS250 chassis are sized more for a regular person, there's parts and support and a really good community of people everywhere on the net still rocking away with them, parts are still being made and re-made, and new cool stuff gets made all the time to give them some updates.

    i was considering diving into a 3 cylinder Banshee motor, 750cc, reverse cylinders, dry clutch conversion, Nova trans, Mattoon cases, outrigger bearing setup for the output shaft to center the motor... and throwing that into an R6. would probably do about 150-160whp pretty easily with just run of the mill typical work that Banshee shops do every day. R6 is probably the easiest chassis to setup and buy stuff for on earth right now. get some YZR500 fairings and the works. seemed like a solid idea for something stupid that would pucker up my butthole a little, but def pricey.

    didn't go that route because honestly i just came upon getting a Vdue motor all brand new thru some FB contacts which was way easier than i ever thought it would be and i loved that idea, and that alone decided the rest. the Vtwin will be less vibey for sure, and less weight, has e-start, runs pump gas... one less of everything else too (pipe, carb, crank/piston/rod/cylinder, etc...). i bought enough spares (cylinders, pistons, cranks/rods, gaskets, bearings, heads) to hopefully make this last a good decade at least with regular maintenance and not having to worry. will have my own backup examples if i ever had to have something made and these italian dudes dropped dead one day or fell off the map.

    literally just ordered the motor stuff this week, and bought a frame. already have a set of GP brembos in a box. that's it. at the very beginning. so i'll stack parts for this thing for a year, but no engine building needed, so besides tuning the ECU and carbs at the end, its mostly just bolting it all together with a tiny bit of engine mount fab, a few 4-8 week wait items that are regularly produced, and some wiring. means no real waiting on anyone else, no 8+ months on engine builders or waiting on special order trans parts, which means i can just plug along at a steady pace. should be light and quick and mega fun. keep the supersingle for general track day fuckery and not worry about it as much or hurting it, bring this one out from time to time, and enjoy. for the 2nd one, i wanted something with top tier everything that i can keep and enjoy forever, even until i'm an old man. that's the idea and reasoning at least. we'll see how many bumps i encounter, but i'm excited.
    90kacoupe, MachineR1 and VFR#52 like this.
  11. motion

    motion On an adventure somewhere

    Can't wait to see how this turns out. Pics??
  12. Sweatypants

    Sweatypants I am so smart! S-M-R-T... I mean S-M-A-R-T!

    i got no pics yet. engine in the mail i think wednesday. frame in the mail. calipers were from a nice gentlemen here a few months back.

    here's a similar one though... gonna get these exhausts i think, and/or maybe eventually have them copied in titanium:




    looking into either some used FGR forks, or these guys here (depending on the price they eek out at):


    this tank/monocoque:


    RSW250 swingarm cover replica


    shrug???? haha
    dieterly and pscook like this.
  13. mattology

    mattology Well-Known Member

    im cool w this
    Sweatypants likes this.

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