My two stroke project 2012 300 xc converted to a 300 sx

So sick, WOW!

Would you let me ride it one of these days??? ;-)

Bike looks rad, but why did you start with a cross country bike if you planned on making it into a moto bike. Why didn't you start with the 250 sx and put the $800 300 kit.

I ride mostly desert.. Practice at the track quite a bit, and race the local desert series when I feel like it.. O30 Expert..

When I saw this post I thought the idea came from the new MXA article.. Cool build and a good looking bike.. I'm really close to doing the same thing. I've had 2 300's in recent years and have an '11 250SX now..

I personally would recommend putting a 300SX kit on a 250sx.. The biggest reason is gearing. The 250 runs out of legs pretty quick stock, let alone with 5-7 more HP..

In the past my gripe with 300's, or KTM's in general has been handling; turning to be more specific. I've always thought they felt vague and under steered. I thrown away thousands to various suspension tuners and was never completely happy..

Bought by 2011 250SX in September of 2010, I was luck enough to get one of the first shipments. I had trail tricks do the suspension. The bike is amazing,, The suspension was good in the rocks but I thought was under suspended in the whoops and jumps. I've always blown through the stroke if I came up short or dropped the front tire in a whoop..

In August of 2011, I bought a 2011 YZ450.. This was my first 4-stroke... Prior to making this purchase, I was a flaming 4-stroke hater.. My reasons were the same as everyone elses (Weight, cost, maintenance, valves, blabalbal) This YZ was eye opening for sure, and hopefully from here on I will always have a smoker and a broker..

After putting 40 hours on my YZ, I got back on my SX.. It sat around for a couple of months while I put a new top end in it. I was instantly reminded I wasn't on my 450.. The SX feels light, quick, and handles very nimbly feeling.. I had to remember to keep my revs up if I wanted to seat bounce over a series of whoops. At first I almost didn't like it any more. After an hour or so, I was back in a groove, hitting my lines and I wasn't thinking about the bike anymore.. I guess what I'm saying is, I adjusted and began just riding the bike like I knew how..

Recently, A guy at the shop has been harassing me about buying my SX.. I've literally lost sleep thinking about it.. Today, I took my SX up to the shop for the dude to look it over and decide what he wanted to do. I guess we've reached a deal and I'm gonna sell it. He's getting nothing but the bike. None of my goodies, not even my wheels. As soon as the money is in my hand I'm getting ANOTHER 300..

For the past week, I've pictured my 300, planned my suspension, thought about setup etc.. I know the difference between a 300XC and a 250SX very well and I'm going to mix the two much like the OP has.. I've going to keep my 19'' rear, and my stock 250SX tank. The buyer wants it with the XC tank it's got on it now. I think I'm going to have MX-Tech do my suspension.. I've also been considering FC and RG3.. I know the power can feel a litle lazy but in my experience a pipe and some head work with change that in a hurry.. I don't know about the whole carb swap.. I can find any data on KTM's website telling me what comes stock on a 300.. Whateva.. We can argue theory on that after you explain what you were trying to achieve when you did that..

I'm tired of typing, and my whiskey is almost empty.. I'll add my build to this later..

got a '11 300xc myself...ride it for mx, and love it.

PC pipe/304 silencer. 1 tooth bigger rear sprocket. revalved shock, and stiffer springs up front.

that's all it needed. the bike is a complete blast. smooth, controllable power that can be put down to the ground no problem, and turns better than any bike i've ridden. it could lose a good 5-10lb if i removed the novelty items like the kickstand, larger tank, and battery...but those are great items to have.
Blows my pop's 56hp/34tq crf450 out of the water in terms of maneuverability, ease of being 'in the power', and overall fun factor.

I was really on the fence between the 300xc and my 250sx and got the 250 and I get my TM300 in the next ten days. I'm on the fence now if I want to turn my 250 into a 300 since I will have one. I haven't had a chance to get a computer be cause I have been so busy at work so my wife is getting me one tomorrow and I will post pics of my bike. You should call motoman, the people in Oregon who sell the TM's and order you a scalvini exhaust for your KTM. They look like a factory cone pipe and are really clean.

I have a customer that installed a 300 kit on his 250 SX. Powder coated the frame orange and installed white plastic. its a very cool ride.

what a foking waste of money.

buy a kawi or honda and save your cash dude

BAN

I rode one as well and was stunned at how electric and easy to use the power was. I rode it at the KTM demo day at Washougal and the guy who handed it off to me left it running and I shut it off just so I could electric start a two stroke

Real nice bike there Hoss.

Have fun and enjoy.

Very sweet bike. Just curious, did you put an SX CDI in there or are you planning too? As I imagine the XC CDI would be a lot mellower than the SX.

Weird from a guy called Orangecrush?!?

Did you used to have a KTM?

WOW! Very nice bike Hoss.. you always have some of the coolest looking bikes around. You still running a 4 stroke as well or just the 2 stroke?

Would love to hear a detailed report on the KTM as i know you've gone through quite a few different bikes over the last few years. Would be interesting to hear what you think.

As soon as i get my bike sold, the 250sx is likely to be my next option, been saying so for a while, just need to make it happen.

Have you seen the new Honda 2 stroke line up, they are awesome! Not sure why anyone would buy anything else.

Awesome bike. When you get sick of it I'll trade you a sweet RMZ450 for it.

I had FC do my first 07 450sx-f, & it made a huge difference in the way the bike tracked over chop. Saved me when my timing was off a bit, resulting in coming up a little short, or over-jumping stuff. That thing just soaked it up. Good suspension is worth the money.

Now, I'm seriously considering doing a big-bore on my CR250. For me, it's about the fun-factor.

Sweet bike, dude.

latest issue of MXA has the same project bike by JW

I wonder if a lighter flywheel would be helpfull for mx.

Maybe for a pro, riding supercross or arenacross.. For most mortals, like myself, I think a heaver one is better.. It smooths everything out, controls wheel spin, lessens fatigue, and just makes the bike easier to ride..

ver' nice.

Sik bike man, better not let the haters see you rockin the red bull stickers since you are not a red bull rider LOL! Their theory is if your not gettin paid , do not use them. put some black wheels on it.

That's a sweet ride Hoss!!

Did you use a 300xc fmf pipe or the 250 pipe? I read in mxa that they would only recommend the pro circuit 300xc pipe?

I'm talking about when you bought a pipe, did ask specifically for the 300xc pipe or did they just give you a pipe that works on the 250sx and the 300xc? Mxa said PC was the only one that made a pipe just for the 300. I have every pipe you can buy almost for my bike and so far I like the fmf best too. Check out the scalvini pipe under my profile pics.

I'll look into it. I'm also looking at the dicks carburetor mod.

Yep you can get that from motoman the TM dealer.