View Full Version : Converting a 300exc 2-banger to a road legal motard?
Chancebmx25
5th August 2011, 20:54
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?
racefactory
5th August 2011, 23:25
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!
george formby
6th August 2011, 10:23
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%$$ to do.
Chancebmx25
6th August 2011, 10:26
I nearly bought an EXC a few years ago, not sure of capacity, which came with 17" rims, sticky tires & different brackets for the front brake ( bigger disc ) as part of the deal. took 20 minutes to go from dirt to Motard.
I feared I would be in the scenery very quickly so flagged the deal.
Should be a piece of p%$$ to do.
oh awesome. sounds great.
bogan
6th August 2011, 11:13
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.
george formby
6th August 2011, 11:26
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.
hamd0g
6th August 2011, 13:37
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.
george formby
6th August 2011, 13:46
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:facepalm::shutup:)
hamd0g
6th August 2011, 13:50
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
george formby
6th August 2011, 13:53
I'm pretty sure the motard gear with the bike I looked at was factory.
Taz
6th August 2011, 16:10
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.
racefactory
7th August 2011, 10:21
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!
Kiwi Graham
7th August 2011, 10:33
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 ;)
slowpoke
7th August 2011, 23:18
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.
Jay GTI
8th August 2011, 14:52
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...
racefactory
8th August 2011, 22:16
That's a good point. What's the best way to go about making the flywheel heavier? How much heavier will do?
Jay GTI
9th August 2011, 09:34
You just buy kits, either heavier flywheels, or weights you add to the stock flywheel, all are simple to install. How much depends on the riding you do, normally they're used to calm down MX bikes and make the more suited to trail and enduro riding, but on a motard that's for road use, I'd probably get the heaviest available and see how that goes.
Speed Trickle
23rd September 2015, 19:05
Dear hamdOg, Some tenuous half blind methods of tracking you down led me to this questionable cyber location, but enough of that. I would be really interested in your thoughts about pros and cons of the blue bike verses the orange bike as from what I gather you have experience of both in a legal and above board sense. Was the main reason of your change to update rather than upgrade and would you go back if you could? I was thinking the 570 apart from the standard limited fuel range would make a darn near perfect south island jet fighter but I've never flown in or even on one. Nor have I flown a 500 but there is so much hype about how amazing they are it is in danger of surpassing the levels previously only achieved by the 570 it seems. In short, with consideration to the added costs and complexities of turning each into a weekend or week long on/off warrior and given the difficulties one would face trying to find good enough pre-loved examples as one would be delving into the torrid and crusty second-hand marketplace, which, Sir, would be your pick?
Many hearty cheers in advance
Speed Trickle
23rd September 2015, 22:36
Dear hamdOg, Some tenuous half blind methods of tracking you down led me to this questionable cyber location, but enough of that. I would be really interested in your thoughts about pros and cons of the blue bike verses the orange bike as from what I gather you have experience of both in a legal and above board sense. Was the main reason of your change to update rather than upgrade and would you go back if you could? I was thinking the 570 apart from the standard limited fuel range would make a darn near perfect south island jet fighter but I've never flown in or even on one. Nor have I flown a 500 but there is so much hype about how amazing they are it is in danger of surpassing the levels previously only achieved by the 570 it seems. In short, with consideration to the added costs and complexities of turning each into a weekend or week long on/off warrior and given the difficulties one would face trying to find good enough pre-loved examples as one would be delving into the torrid and crusty second-hand marketplace, which, Sir, would be your pick?
Many hearty cheers in advance
Was trying to get in touch with the hamdog about an unrelated topic. Alas not understanding how to drive on the interbahn I have carelessly disrupted the sweet flow of crucial information. I promise to be more careful in future, honest. Are there any signposts to aid navigation around this site or is like Auckland and has anyone seen the hamdog?
sil3nt
28th October 2015, 08:43
He last logged in to the site on 2nd June 2015 20:51
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