What is it and what is the difference???

[teamexileracing]

K well i was wondering what a doal over head cam is and what a single over head cam is. Because my mojave has a dohc and i think but not sure that warriors have a single ohc. I also no that my mojave gos really fast for a 250 its supose to be the fastest 250 four stroke quad out does the dohc have anything to do with that?

 

[dave76]

K well i was wondering what a doal over head cam is and what a single over head cam is. Because my mojave has a dohc and i think but not sure that warriors have a single ohc. I also no that my mojave gos really fast for a 250 its supose to be the fastest 250 four stroke quad out does the dohc have anything to do with that?

Well to start, most companys use a SOHC because it's 1 cheaper to manufacture because of the one cam incorperated into one, and in essence may make a little more low end. A DOHC uses two cams 1 for the intake valves, and 1 for the exhaust valves. The advantage with twin cams is, you can control the valve timing more precisly then with SOHCs because of the separate camshafts.

 

[teamexileracing]

o well how is the outlaw 525 so fast if it only has a SOHC?

 

[yamarider]

The design of the engine is what makes it powerful. It's only a 510cc which isn't much larger than the original 500 polaris used in the outlaw, the difference is that KTM put more engineering and design work into their engine so that more air flows into and out of the engine, everything is balanced better, and it just generally works more efficiently. You don't necessarily get more power with a dohc, just a different tuning option mostly. Like with a yfz, you have a cam for the intake valves and another cam for your exhaust valves. This gives you more options because you can use a different type of cam for the intake than you do for the exhaust. When you're only running a single cylinder engine you really don't have a NEED for dual cams, because there's only like 5 valves in the head at the most.

 

[dave76]

o well how is the outlaw 525 so fast if it only has a SOHC?

Well it's just the way it was designed, the Honda 450R is an SOHC also. They both have their advantages and disadvantages.
For one an SOHC is very compact and therfor will be lighter, and a DOHC was always known to be a high rever, ultimatly a DOHC motor has more tunability.

 

[teamexileracing]

k now i have another question. Well my firend just got his outlaw 525 and we have some douche bag kids at our school that think there hot **** and always try to start fights, Well now the want to fight my friend becuase he said his outlaw was faster the one kids yfz and the other kids ltr.

What is the fastest and has the most acceleration stock the outlaw, yfz, ltr, 450r?

 

[Guest]

the 2006 and newer 450r's are the fastest 450. the outlaw 525 is supposed to be the fastest accelerating quad but i think a 450r could beat one in a race.

 

[98warrior]

Palerider posted a vid a while ago of an outlaw racing a yfz 470 and like an ltr and something else. The outlaw was stock and smoked them but then again it could have been the riders idk.

 

[troys3175]

Equal riders I'd put my money on the 525.

 

[palerider]

This is what Sparky/Macdaddy had to say about it who owns several stroked 700R and bought a 525. He owns Sand Demon Sports where their business is bigbores and does race porting for several big name companies-

"Ok heres the facts. with stock 525 and stock jetting
1st Yes it will beat a bone stock Raptor 700 by about 3 lenghts.
2nd Yes it will beat a 700 with no baffle and no lid by about 1 lenght
3rd It will not beat a 700 with a pipe and filter
4th It will destroy most 450's with bolt ons

The facts with 525 with no baffle or lid on air box and stock jetting
1st It will now trade wins with a 700 with a pipe (but not the 2 with the lte)
2nd It would beat some banshee's
3rd It did get beat by a ltr but the guy wouldnt say what he did to it."


This was a stock 525. When comparing the YFZ450 to the 700R in a drag it is usually agreed that the 450 will jump out in front for the first 3 gears then the 700 will usually go by it. The YFZ engine revs very fast but does not have the hp of the 700R. It takes the 700R about 4 seconds to reach its peak hp.

Now look at the dynos for the stock 525. It takes under 2 seconds for the KTM 525 engine to hit its peak hp but it has very close to the same hp stock as the 700 does. Not only that but the 525 holds its hp way up into the revs unlike some of the other bikes that lose their hp at 7000 rpm. The 525 engine will rev close to 10000 rpm.

Here is another video of a 525 and some 450's
http://youtube.com/watch?v=nwMQEFm0yx4

 

[teamexileracing]

Thanks guys now i will have something to rub in those jerkoffs faces.

 

[palerider]

You were saying earlier this is his first manual quad. Did you teach him how to drive a manual yet? Did he let you ride it any?

Since he is new to clutch's do not expect him to be able to hop on it and lay the smack down on everybody. A good driver on a slower quad can beat a faster quad with an inexperience driver. Of course a fast quad can make up for inexperience.

 

[dswwarrior350]

This is what Sparky/Macdaddy had to say about it who owns several stroked 700R and bought a 525. He owns Sand Demon Sports where their business is bigbores and does race porting for several big name companies-

"Ok heres the facts. with stock 525 and stock jetting
1st Yes it will beat a bone stock Raptor 700 by about 3 lenghts.
2nd Yes it will beat a 700 with no baffle and no lid by about 1 lenght
3rd It will not beat a 700 with a pipe and filter
4th It will destroy most 450's with bolt ons

The facts with 525 with no baffle or lid on air box and stock jetting
1st It will now trade wins with a 700 with a pipe (but not the 2 with the lte)
2nd It would beat some banshee's
3rd It did get beat by a ltr but the guy wouldnt say what he did to it."


This was a stock 525. When comparing the YFZ450 to the 700R in a drag it is usually agreed that the 450 will jump out in front for the first 3 gears then the 700 will usually go by it. The YFZ engine revs very fast but does not have the hp of the 700R. It takes the 700R about 4 seconds to reach its peak hp.

Now look at the dynos for the stock 525. It takes under 2 seconds for the KTM 525 engine to hit its peak hp but it has very close to the same hp stock as the 700 does. Not only that but the 525 holds its hp way up into the revs unlike some of the other bikes that lose their hp at 7000 rpm. The 525 engine will rev close to 10000 rpm.

Here is another video of a 525 and some 450's
http://youtube.com/watch?v=nwMQEFm0yx4

Impressive.... yet the yfz is just waiting to be unleashed in stock form. Theres more than enough power availible in stock form to make up all the diffrence seen in those tests.

 

[palerider]

[quote:geeq4bqj]This is what Sparky/Macdaddy had to say about it who owns several stroked 700R and bought a 525. He owns Sand Demon Sports where their business is bigbores and does race porting for several big name companies-

"Ok heres the facts. with stock 525 and stock jetting
1st Yes it will beat a bone stock Raptor 700 by about 3 lenghts.
2nd Yes it will beat a 700 with no baffle and no lid by about 1 lenght
3rd It will not beat a 700 with a pipe and filter
4th It will destroy most 450's with bolt ons

The facts with 525 with no baffle or lid on air box and stock jetting
1st It will now trade wins with a 700 with a pipe (but not the 2 with the lte)
2nd It would beat some banshee's
3rd It did get beat by a ltr but the guy wouldnt say what he did to it."


This was a stock 525. When comparing the YFZ450 to the 700R in a drag it is usually agreed that the 450 will jump out in front for the first 3 gears then the 700 will usually go by it. The YFZ engine revs very fast but does not have the hp of the 700R. It takes the 700R about 4 seconds to reach its peak hp.

Now look at the dynos for the stock 525. It takes under 2 seconds for the KTM 525 engine to hit its peak hp but it has very close to the same hp stock as the 700 does. Not only that but the 525 holds its hp way up into the revs unlike some of the other bikes that lose their hp at 7000 rpm. The 525 engine will rev close to 10000 rpm.

Here is another video of a 525 and some 450's
http://youtube.com/watch?v=nwMQEFm0yx4

Impressive.... yet the yfz is just waiting to be unleashed in stock form. Theres more than enough power availible in stock form to make up all the diffrence seen in those tests.[/quote:geeq4bqj]

The same can be said for almost all stock quads and the 525 is no different. Just pulling the air lid off the 525 gives it a 3 hp jump on the dyno. That alone shows how corked up the intake is. Like the YFZ, it comes out extremely lean, it is stock with a 148 main jet and I now have mine at a 170 main jet with just the sparky out and lid off. That is a ton more fuel going into that engine. A pipe and an aftermarket intake on the KTM 525 is said to make another substantial difference in power.

With enough money anything can be fast in a straight line.

 

[dswwarrior350]

The cam mod and removal of lid and exhaust baffle are all completely free with the excepetion of the jets which cost around 5-6 bucks. But your right either way.

 

[teamexileracing]

k i got a problem with my warrior. I have my back up engine in my bike right now becuae im doing major work on my other engine. Anyways its a 1988 and when i start it up it smokes for a couple of minutes then it stops. Then today i started it up and it didnt smoke as much but it smelled like it was burning oil. I think the smoke had to do with it sitting for a couple of weeks because all my bikes smoke when i dont start them for a while. The thing im worried about is the burning oil, the motor has a aftermarket oildipstick plug that doesnt look like it was made for the bike. But when i checked it it said it was low so i filled it up. I was thinking that since i dont think it was made for that bike that i over filled it becuae it didnt smell like that before i filled it back up. Would over filling the motor with oil make it burn oil? or make it smell like burning oil?