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Sportbike motard.

11K views 40 replies 20 participants last post by  n0regret5  
#1 ·
I need you guys to tell me what's wrong with this plan...

Take one sport bike... 600, 1000, v-twin, inline, whatever... and swap the forks and swinger for sumo forks and swinger. I'm pretty sure custom triples would be needed to retain proper rake and trail, and some machining to get the swinger to work, but all things considered, why wouldn't this work? And by work, I mean handle nearly as well as a sumo and not be a complete piece of shit.
 
#3 ·
this is the bike out of toom raider

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and this is my one in london

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any thing is possable
 
#6 ·
its a yamaha

trx850

somtimes called a japcati as it looks like a duc
 
#7 ·
I dont see any benefits. You are talking about taking suspension(forks) designed to work with a 250lbs bike and put them on a 400+ lb bike. Also keep in mind you are taking a good handling heavy bike(comparatively) and moving its CG up a good bit higher. Not to mention the length different in an MX/motard swingarm vs a street bike is huge. This will make your wheel base much longer plus its not designed to handle the kind of torsion thrown at it from a 400+lb bike.

In the end you will have a slow turning unstable bike. A motard would be much more fun.
 
#11 ·
there was a gsxr1100 made a while back that was set up for oddroad use, plus a couple others which i remember seeing but can't remember what they were..basically you're asking for trouble haha, those bikes were designed for use on the road and as such are heavy as fuck, whereas trailbikes were designed to be as light as possible to make them easier to manouvre on uneven surfaces. you'd get a fat, heavy, potentially overpowered catapault.

i say do it so we can enjoy the fireworks :D
 
#13 ·
I've seen SV650's done up as motards, and a few Ducs, and there was an R1 flat tracker I saw a while back, so it's possible.
 
#15 ·
I've been down this road with both my XS650 and then with the VF500F, then the XS Interceptor was the bastard child of the two of them. It was basically a 400lb SM when you break it down to the nitty gritty of the situation and it handled nothing like a trail bike or a dual sport. I think the only thing it had going for it aside from the ridiculous bottom end power and the "over the top" dual disk brakes up front was the fact it never killed me.

If I was to combine the technologies of street and offroad again, it would be for something worth hurting myself on, kinda like this. :D
 
#16 ·
I was originally thinking about doing this, and saw some pretty good examples of functioning)motards using the RZ350 engine and frame, like you describe. How functional is the question.

I decided to use the supermoto frame because a street frame is set up differently.

On a street frame, the engine, footpegs and seat are further back. A motard has the footpegs where the rear of the engine is on a street bike.

IMO, it's a much better idea to put the sportbike engine into a complete motard - and the engine should be about the same weight as the original engine.

Don't know what engine to recommend. Too many issues with the RZ350, and other street engines I've seen.
 
#21 ·
I was going to ask, are those even fun to ride in the dirt? I can't imagine so.
 
#23 ·
Watching that R1 bike in the dirt was kind of sad. It obviously handles like shit, judging by the way the guy was riding it.
 
#24 ·
i was thinking the same thing. That r1 didnt look any fun at all. You cant ride it like a true off road bike. You cant move your weight around, its too wide/stiff/heavy and there is no need for that much power/speed unless your seth enslow and want to jump something stupid.

Smokey, single cylinder motard eh, what about the svx? :)


On a true mx/motard the rider is a mucher higher percentage of the overall weight and being able to move your weight around/have leverage on the bike is what makes them so flickable(among many other things). Turning a street bike into a motard is asking for trouble.

If you wanted to take a dual sport/mx frame and put a street engine in it I would stick to something like an inline twin like the kaw er.
 
#28 ·
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terramostro

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sxv550 in a rs250 chasis




you describe this

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can you use a klr650 "Base" and swap some sort of sv650, or sv1000 motor in it, yes. they already have one its called a vstorm. its not fast and its quite heavy. touring bike. anything you could think of creating would turn into a touring mount. you would need to pick up a trellis frame and then a LIGHTWEIGHT vtwin. last i checked the euromotors run a premium. if you wanted to 1up a factory duc or ktm it would cost about $20k if you diy. and you'd still get destroyed in the corners by 5k motards.

think power to weight ratio. reason people sumo those 450s.
 
#40 ·
Here's what I've done to make a bike that can handle (almost) any riding situation...

1. Buy a new, shiny & fast as hell sport bike (my choice was a '06 ZX636R)

2. Crash the hell out of it, make sure to live through the crash btw...

3. Strip everything off that doesn't make her accelerate, turn or slow down.

4. Buy the most aggressive tires you can find to fit your wheels (dunlop 616's for me)

End result...

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I've done everything on my 636, love her!