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Thread: Converting a 300exc 2-banger to a road legal motard?

  1. #1
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    Converting a 300exc 2-banger to a road legal motard?

    Hey guys, the title does say it all, im interested to get hold a 300exc and throw some road gear on it. I notice that torpedo 7 sell a 17inch alloy wheelset to suit KTM 300exc models but whats the chances of this all failing? are there specialist that can help me convert something like this? is it worth it? or should i get something totally different. Im keen to get into supermoto's i just dont know where to start, im not to keen on a drz like most other people, a 525exc looks nice. Something thatll basically be awesome on the track?
    The only other option is to A- Grow up or B- Sort your shit out.

  2. #2
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    Just. Do. It.

    Would be the coolest thing to see on the road and so unique. I don't know what the trouble is though; just get some wheels and bolt them on, maybe another chain for convenience so you don't have to split it for the smaller road sprocket. Stock brake is fine. 300 bucks or so for compliance and you're away!
    ...Full throttle till you see god, then brake.

  3. #3
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    14th June 2007 - 22:39
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    I nearly bought an EXC a few years ago, not sure of capacity, which came with 17" rims, sticky tires & different brackets for the front brake ( bigger disc ) as part of the deal. took 20 minutes to go from dirt to Motard.
    I feared I would be in the scenery very quickly so flagged the deal.

    Should be a piece of p%$$ to do.

  4. #4
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    Quote Originally Posted by george formby View Post
    I nearly bought an EXC a few years ago, not sure of capacity, which came with 17" rims, sticky tires & different brackets for the front brake ( bigger disc ) as part of the deal. took 20 minutes to go from dirt to Motard.
    I feared I would be in the scenery very quickly so flagged the deal.

    Should be a piece of p%$$ to do.
    oh awesome. sounds great.
    The only other option is to A- Grow up or B- Sort your shit out.

  5. #5
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    Piss easy to do, but I doubt it'd be that nice to ride normally (fun to thrash obviously), and servicing could get pretty expensive. 525 would be a far better choice imo.
    "A shark on whiskey is mighty risky, but a shark on beer is a beer engineer" - Tad Ghostal

  6. #6
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    Quote Originally Posted by bogan View Post
    Piss easy to do, but I doubt it'd be that nice to ride normally (fun to thrash obviously), and servicing could get pretty expensive. 525 would be a far better choice imo.
    That was part of my thinking too, I would not be riding far on it. Piddly tank, razor blade seat, no cup holder. Realised I needed something with longer legs. It was very tempting though, looked the mutts nuts.

  7. #7
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    the more orange bikes on the road the better i say, It be more challanging learning the motard style with a 2 stroke. the lack of engine braking would make a lot harder to back into turns etc. not impossible but harder to master id say.

  8. #8
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    Quote Originally Posted by hamd0g View Post
    the more orange bikes on the road the better i say, It be more challanging learning the motard style with a 2 stroke. the lack of engine braking would make a lot harder to back into turns etc. not impossible but harder to master id say.
    Nah, the OP is mean as at sliding 2 strokes....


    (Sorry chancebmx25, just could'nt resist)

  9. #9
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    do you already have a 300EXC ??? if not, just keep an eye out for one with the road kit included, they are all sold from new with lights etc.

    the ktm dash is easily programmed to suit the different size front wheel so you still get an accurate speedo.

    also wheels come up all the time on Trade Me, i got a set including large front brake rotor, spacer for the front brake caliper, sproket, AND tyres (M3s)all for $1200

    Torp.7 is a nice cheap option, but they do not come with brake rotors or sprockets

  10. #10
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    I'm pretty sure the motard gear with the bike I looked at was factory.

  11. #11
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    450 or 525 exc would be my pick. That way at least you can fill up at the gas station without worrying about mixing fuel.

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    I would also get a 450 525 if you are mainly looking at road riding/commuting. Someone brought up a good point too in that it would be extremely difficult to back in a 2 stroke wouldn't it? I think you'd really risk over revving it?

    450 is the 525 engine with a shorter stroke and different head gasket for more compression. RFS motors are also an awesome workhorse, people use them for adventure riding too. On advrider.com there are heaps of guys who motard and adventure ride their 525s across the world. Some guy from NZ actually, name escapes me now, took his 525 from Japan to Mongolia through some harsh as shit environments. Not a single problem, they are beasts.

    But yeah, like hamdog says- the more orange bikes on the road the better!
    ...Full throttle till you see god, then brake.

  13. #13
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    Quote Originally Posted by bogan View Post
    Piss easy to do, but I doubt it'd be that nice to ride normally (fun to thrash obviously), and servicing could get pretty expensive. 525 would be a far better choice imo.
    Did it to a 620 (check my pics in my profile). Just a case of locating a few road parts and away you go. I even got it through the license with Michelin intermediate race tyres on (hot knife on the 'not for road use' writing), mental lean angles etc.

    As has been said an absolute tool on the road but maintaining it is a pain and fuel range was awful.
    The best commuter bike I have ever had

  14. #14
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    How much general road riding are you gonna do? From a mate with a 300EXC it was pain in the arse on the road. Sure great fun at the right time, but just trying to dawdle around at a constant throttle is impossible, it was always either off or on with no in between. Sounds good for a lil' bit but soon gets on your tits in traffic.

  15. #15
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    Quote Originally Posted by slowpoke View Post
    How much general road riding are you gonna do? From a mate with a 300EXC it was pain in the arse on the road. Sure great fun at the right time, but just trying to dawdle around at a constant throttle is impossible, it was always either off or on with no in between. Sounds good for a lil' bit but soon gets on your tits in traffic.
    Stick the softest powervalve spring in, throw on a decent flywheel weight and add a cush drive hub at the back and it'll be much nicer on the road. It'll still be a bit snatchy on part-throttle, but it's a 2 smoke...

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