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[revhighex]

That's why i'm really starting to like this forum you guys are always willing to lend a hand 

[Slvr720]

That's why i'm really starting to like this forum you guys are always willing to lend a hand 

True, but most of the time it's a backhand they offer 

[redhedrednek]

That's why i'm really starting to like this forum you guys are always willing to lend a hand 

True, but most of the time it's a backhand they offer 

FU....

[racingunlimited]

I've been roadracing EX500s since 1999. Won a few natl twins titles, with a fast rider.. Johnny Staska. You guys can google up that stuff.
My 540cc EX engine makes about 70 dynojet HP. My 600cc EX motor makes 80. The 600 will break a crank in two, usually some time after 250-300 race miles. I've got a (stiffer) crank stroker 650cc EX500 in the works, which should make closer to 90HP... With a 32mm (in) valve head. Who ever said that these bikes don't respond to porting, should be discounted immeadiatly. I've spent hundreds of hours porting and flow testing EXs. Stock heads flow just over 100CFM @ 10in H2o. A good 32mm head will flow 140. My stroker 500 mis on the back burner, since we built a Ninja 650 Racebike.

The Ninja 650 made 98HP, with 12.6 to 1 compression. I just revised to a single ring piston, and 13.8 comp. Havn't been back to the dyno yet.

BTW, I've got 3  complete racebikes for sale, including the championshp winner... With a fresh 600cc engine. Also have a couple of nice race engines for sale.

Alan
Alan Rodenborn
Racing Unlimited
Kawasaki/Polaris
2606 200TH ST
Fort Dodge, Iowa 50501
(515)955-6000
www.racingunlimited.com

"Motor racing, mountain climbing and bull fighting are the only true sports. All the rest are children's games played by adults." - Ernest Hemingway

[redkow97]

^ awesome info.   how much does the 540cc setup cost?

I'd sacrifice my daily ride to confuse the heck out of some SV riders in the LW twins class

[revhighex]

Let me be the first to call BS... THE EX MOTOR IS MAXED OUT STOCK 
Excellent post!!! That is what I've been looking for!!  I'm sure I'll be in contact with you guys

[racingunlimited]

It really is fun, to see the looks on the faces of the SV and 2v Duc guys. They think that it just can't be an EX500, that ran off and left them for dead. Most of the riders in AHRMA BOT know my bike and rider by now though.

Alan Rodenborn
Racing Unlimited
Kawasaki/Polaris
2606 200TH ST
Fort Dodge, Iowa 50501
(515)955-6000
www.racingunlimited.com

"Motor racing, mountain climbing and bull fighting are the only true sports. All the rest are children's games played by adults." - Ernest Hemingway

[slip304]

I've been roadracing EX500s since 1999. Won a few natl twins titles, with a fast rider.. Johnny Staska. You guys can google up that stuff.
My 540cc EX engine makes about 70 dynojet HP. My 600cc EX motor makes 80. The 600 will break a crank in two, usually some time after 250-300 race miles. I've got a (stiffer) crank stroker 650cc EX500 in the works, which should make closer to 90HP... With a 32mm (in) valve head. Who ever said that these bikes don't respond to porting, should be discounted immeadiatly. I've spent hundreds of hours porting and flow testing EXs. Stock heads flow just over 100CFM @ 10in H2o. A good 32mm head will flow 140. My stroker 500 mis on the back burner, since we built a Ninja 650 Racebike.

The Ninja 650 made 98HP, with 12.6 to 1 compression. I just revised to a single ring piston, and 13.8 comp. Havn't been back to the dyno yet.

BTW, I've got 3  complete racebikes for sale, including the championshp winner... With a fresh 600cc engine. Also have a couple of nice race engines for sale.

Alan
Alan Rodenborn
Racing Unlimited
Kawasaki/Polaris
2606 200TH ST
Fort Dodge, Iowa 50501
(515)955-6000
www.racingunlimited.com

"Motor racing, mountain climbing and bull fighting are the only true sports. All the rest are children's games played by adults." - Ernest Hemingway

  This thread just finally got interesting.. 

[Pogo]

Kinda makes me think that things have been done with the 500 after FOG's time that weren't done during.

[Earth Attire]

I've been roadracing EX500s since 1999. Won a few natl twins titles, with a fast rider.. Johnny Staska. You guys can google up that stuff.
My 540cc EX engine makes about 70 dynojet HP. My 600cc EX motor makes 80. The 600 will break a crank in two, usually some time after 250-300 race miles. I've got a (stiffer) crank stroker 650cc EX500 in the works, which should make closer to 90HP... With a 32mm (in) valve head. Who ever said that these bikes don't respond to porting, should be discounted immeadiatly. I've spent hundreds of hours porting and flow testing EXs. Stock heads flow just over 100CFM @ 10in H2o. A good 32mm head will flow 140. My stroker 500 mis on the back burner, since we built a Ninja 650 Racebike.

The Ninja 650 made 98HP, with 12.6 to 1 compression. I just revised to a single ring piston, and 13.8 comp. Havn't been back to the dyno yet.

BTW, I've got 3  complete racebikes for sale, including the championshp winner... With a fresh 600cc engine. Also have a couple of nice race engines for sale.

Alan
Alan Rodenborn
Racing Unlimited
Kawasaki/Polaris
2606 200TH ST
Fort Dodge, Iowa 50501
(515)955-6000
www.racingunlimited.com

"Motor racing, mountain climbing and bull fighting are the only true sports. All the rest are children's games played by adults." - Ernest Hemingway

THEY MUST RIP IT!!! wow jg

[bitzz]

Kinda makes me think that things have been done with the 500 after FOG's time that weren't done during.

You guys haven't clued into the fact the your hero FOG raced in stock, or close to stock classes. He is NOT the one to talk to about making HP. He would be the one to talk to about making HP on a stock motor. Sorry ANYONE that says you LOSE HP by installing headers has to be suspect. (I have been playing with motors since the '60s, been racing since the '70s and have NEVER lost HP to a set of headers. EVER. NOT ONCE. That would be STUPID.

Mr. RacingUnlimited isn't doing anything that hasn't been around forever... well maybe not the single ring piston (it has been around, but just recently used in 4 strokes. Been used in top fuel motors since the '70s or '80s).
All it takes is a box full of money and a lot of time.

Making HP from a EX motor isn't that hard.
I just tired of replacing crankshafts. If the Norton I'm riding didn't come along I would still be replacing cranks.
A cleaned up OEM crank and a set of rods is $1200... every other weekend... but I had the fastest EX around.

[Pogo]

Whoa, hey, FOG isn't my hero. If we were in a room together I'm pretty sure we'd get into a gunfight.

I don't claim to speak for him, and he may even jump in here to comment at some point, but FOG was never of the position that it's impossible to get more HP from the motor, just that the motor is

1) terrible at sustaining itself (i.e. expensive) when upgraded and
2) beyond the reach of substantial upgrading via stupid little mods that Joe Shmoe The Average Mechanical Idiot Wannabe Crotch Rocket Racer can do to a myriad of other bikes that DO react well to changes

This forum has dozens of posts about people wanting to upgrade via nitrous or porting or jetting, but they come in here talking about it half-assed without knowing the weak points of the engine or the technical skill involved in balancing all the things that come with those...  e.g. like some asshole who wants to put a supercharger on his Honda Civic without doing anything else that costs thousands of dollars in order to do it right.

The funny thing is, even after criticizing the ideas, FOG and others DO tell people what they need to do to create those upgrades, and yet all we hear back is a response on the criticism from other people. Most of these posters expect some kind of hand-holding through the process or more specifics. If you can't figure out the specifics, then cut your losses and get a new hobby.

But hey, I'm at the point where I WANT to see someone do this shit and post back here. We've heard it so many times and it was all blowing smoke. I'd rather see someone do it and YouTube it so that we can see the smoke blowing out of their engine, and not their asses.

[Apriliarider]

Whoa, hey, FOG isn't my hero. If we were in a room together I'm pretty sure we'd get into a gunfight.

I don't claim to speak for him, and he may even jump in here to comment at some point, but FOG was never of the position that it's impossible to get more HP from the motor, just that the motor is

1) terrible at sustaining itself (i.e. expensive) when upgraded and
2) beyond the reach of substantial upgrading via stupid little mods that Joe Shmoe The Average Mechanical Idiot Wannabe Crotch Rocket Racer can do to a myriad of other bikes that DO react well to changes

This forum has dozens of posts about people wanting to upgrade via nitrous or porting or jetting, but they come in here talking about it half-assed without knowing the weak points of the engine or the technical skill involved in balancing all the things that come with those...  e.g. like some asshole who wants to put a supercharger on his Honda Civic without doing anything else that costs thousands of dollars in order to do it right.

The funny thing is, even after criticizing the ideas, FOG and others DO tell people what they need to do to create those upgrades, and yet all we hear back is a response on the criticism from other people. Most of these posters expect some kind of hand-holding through the process or more specifics. If you can't figure out the specifics, then cut your losses and get a new hobby.

But hey, I'm at the point where I WANT to see someone do this shit and post back here. We've heard it so many times and it was all blowing smoke. I'd rather see someone do it and YouTube it so that we can see the smoke blowing out of their engine, and not their asses.

Well said.

[redhedrednek]

wait you cant just bolt on a turbasupadupafukcharga without doing more mods...the agony...what else do i need to do to make this shyt work that i have already done and my bike runs like a giant turd? and the response would be "put it back how it was before and be happy with it" because if ya cant halfway figure it out then ya prolly are gonna get halfway dead or all the way bankbusted in the process. I agree with FOG tho, if any of the major mods were reliable we would see them a lot more on the daily driver. I know that there are a lot of things that can be done to any system to improve them but would it really be worth the money and effort, not when you can upgrade to a bigger badder bike much cheaper than building the hell out of this one. Its like trying to take a Yugo and make a racecar out of it....just buy the older 5.0 stang or a camaro with a 350. Money saved and more fun to be had. Next time i have a box of cash to burn, i wont be trying to build the 500, ill be buying a katana.

[solar-ex]

if the guy wants to build a f@!#ing EX let him do it, he has already heard all the bull shit about it blowing up, point made and he is still going on with it, so stop giving the same old "its gonna blow up, its to much money" B.S. and let the guy have some fun..

[Pogo]

if the guy wants to build a f@!#ing EX let him do it, he has already heard all the bull shit about it blowing up, point made and he is still going on with it, so stop giving the same old "its gonna blow up, its to much money" B.S. and let the guy have some fun..

And, once again, if someone wants to do this then more power to them. All the suggestions for how to do it have been made. Of course, nobody that has actually put nitrous into an ex500 motor has posted back here to talk about, so we can only assume it just hasn't been done. If it hasn't been done, exactly what suggestions are we to give other than spending a ton of money to reinforce the weakest parts of the motor?

[revhighex]

So i finally got around to getting my 500R running and ready for boost.  Frame is going off for pressure box fitament and turbo manifold creation    Track time is almost here and its time for a quick spool 

I think it's gonna be a green tail black tank fighter...

[exracr]

hey racingunlimited,

I got a 540cc kit in mine... just need to tune it; and it'll be on the road this summer!!

Might have to take a trip up there and see you folks.... your straight north about 5 hrs from me; I'm originally from just north of Clinton, Iowa!

[redkow97]

so i'll ask again, how much does a 540cc build cost, and how long does the engine last?

I'm no engine-builder.  I prefer riding to wrenching.  With that said, I flat-out LOVE superstock classes, because they keep budgets (moderately) in check.  for a few HUNDRED bucks, I'd consider a 540cc build.  if it's beyond a thousand, I may as well just sell my EX and buy a 650...

As many fun parts as I've got on my (track) bike, part of me really wishes there was a truly 'stock' 600 or 650cc class that didn't allow any modifications beyond a steering damper and race bodywork.

I consider my bike pretty mildly modified (all by the previous owner), but the costs he sunk into it still make me dizzy... 

[onetworide]

Glad to hear you have gone through with it, revhigh. I'm anxious to hear the results.

[whitetrashvw]

totally pumped that you are doing this. for years ive wanted to make a hand grenade nitrous ex500 1/8mile drag motor using my old worn out motor sittin under the work bench, knowing full well it will pop sooner rather than later, but honestly dont have the extra  money (always seem to be spending $ fixing some bike or car). so i totally appreciate the spirit of this. ive been lurking on various ex500 sites for a while now and many people say they will nitrous or turbo one but nobody seems to follow through (myself included). so the fact you are actuall doing it is awsome!