Anyone tried a ktm520 sx?
- Thread starter Flash06
- Start date
Taft Racing
Member
My guess would be pretty much like any of the 450's. The toque on these big 4 strokes is huge. They'll all lay you in the seat right off idle. Cammer engines can turn more rpm and carry wider torque curves. I know of some guys using the ktm's in Georgia. Can't tell what model.
Even if it was 501cc from the factory it would not be UAS legal. If you read the rulebook closer you'll see that the engine has to be 500cc's or less from the factory and then it can be up to 510cc to account for wear. At least I think it says that. Take a look.
But, the KTM 520 is an awesome off-road bike. I regretfully passed up an opportunity to buy one from a buddy of mine recently. That thing was a dream ride. Controllable power and plenty of it. Not as heavy as you would expect, either.
But really, a 450 is PLENTY so I would suggest that route. Even the KTM 350 is plenty of power, from what I've heard/read.
* I'm riding a Honda CRF450X now and LOVE it! Maybe when the bike gets tired the engine will find it's way to a kart, electric start and all.
But, the KTM 520 is an awesome off-road bike. I regretfully passed up an opportunity to buy one from a buddy of mine recently. That thing was a dream ride. Controllable power and plenty of it. Not as heavy as you would expect, either.
But really, a 450 is PLENTY so I would suggest that route. Even the KTM 350 is plenty of power, from what I've heard/read.
* I'm riding a Honda CRF450X now and LOVE it! Maybe when the bike gets tired the engine will find it's way to a kart, electric start and all.
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The rules read 510cc from the best I can see. I'm only asking about this because a friend of mine has easy access to one cheap. I was thinking some porting, exhaust and the right cam, switched to methanol and it should be a healthy 60+ hp. Might just have to try it and see what happens. How much are the jawas going for?
Taft Racing
Member
Jawa's are in the 3,000.00 range, rebuilt used ones. The HP ratings are usually from the rear wheel on a bike, but it's more about the torque of those monsters, wicked fast on a kart. Mike's talking about a new engine right from KTM 5,000.00 he likes shinny new toys.
http://unlimitedallstars.org/2013uasrulebook.pdf
Rules state 510cc nothing about how they got to that displacement.
http://unlimitedallstars.org/2013uasrulebook.pdf
Rules state 510cc nothing about how they got to that displacement.
Taft Racing
Member
No replacement for displacement. lol
Thanks for the correction on my 500cc thought. If someone has a 2012 or 2011 rulebook see if it was in there. I think it was lost in translation when someone "simplified" the engine rules. I'm thinking Eric Rector did this for 2012. Anyway, that's beside the point. 510 it is, clear as day. But 510.001 is illegal.
MikeGrady
Member
I am all about new stuff. If I buy something used, I automatically think FULL rebuild. Nothing like spending cash on something, going to all the trouble to make it mount up and fit to take it out one time and have it break on you. Now you have to fix something damaged.
I've been a dirt bike guy for a while. It's a dirt bike. They are usually selling it for a reason or they stopped riding it for a reason. If you're going to race something, I HIGHLY recommend you don't just bolt it on and go race. Riding a dirt bike in the woods is a heck of a lot different than racing it on a kart. We spend a lot of time in that upper RPM range for a long period of time.
Mike
I've been a dirt bike guy for a while. It's a dirt bike. They are usually selling it for a reason or they stopped riding it for a reason. If you're going to race something, I HIGHLY recommend you don't just bolt it on and go race. Riding a dirt bike in the woods is a heck of a lot different than racing it on a kart. We spend a lot of time in that upper RPM range for a long period of time.
Mike
Well I'm all about buying cheap used stuff and making it go fast I've been doing it for years and if you look at my stuff you would think its brand new. I also have a lot of experience with dirt bikes and racing period, I also build my own motors and karts, I wouldn't buy a pos mike. Im only asking for input based upon the performance of this particular motor which obviously I know nothing about.
Brian Montgomery
Member
I love manufacture sizing. The KTM505 is only 100mmx60.8mm=478cc.