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exhaust questions

4314 Views 39 Replies 15 Participants Last post by  speedbagger
How's the stock exhaust on the 450? Sound? power?

Is the full FBF exhaust worth it? The Ti can is nice. Does the exhaust add power/save weight/sound nice? Does it require rejetting?
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TomCRMI said:
Ich flippe im Husqvarna Forum rum ... Ich komme ursprünglich aus Rheinland Pfalz, aber bin jetzt in Michigan.
Wo sind sich Sie in Michigan befunden? <courtesy of www.freetranslation.com>

Where are located in Michigan?
Ubermoto said:
Wo sind sich Sie in Michigan befunden? <courtesy of www.freetranslation.com>

Where are located in Michigan?
*lol* Freetranslation is funny ... sounds kinda backward like.

"Where you are in Michigan living?"

My current dwelling is located in the north western suburbs of Mo-Town.
Where are you?
On a tip from thumpertalk, it turns out that one of Big-Gun's straight through exhaust inserts fit the Husky can if you cut the insert down a little. i ordered an insert from Big-Gun for $14.00.
TomCRMI said:
*lol* Freetranslation is funny ... sounds kinda backward like.

"Where you are in Michigan living?"

My current dwelling is located in the north western suburbs of Mo-Town.
Where are you?
I thought that might be the case with the translation!

I live in New Orleans now, but I too used to live in the burbs of Detroit. I don't miss the weather!
Here is the link to the thread I started in the Husqvarna Forum.

It is all in german and translating it via google unfortunately failed.
If you want you can post questions in english there. A lot of people know english there and everybody is happy to help with any issues.

You see there a diagram from a SMR450 in the second post. Measured is rear wheel power! (with rear tire inflated to about 35 PSI I would think)
Red is stock [email protected] 8243rpm
Blue is a SR-Racing Collector with a Husaberg FE 650 Muffler, rest stock 41.7kW @ 8461rpm

Husky Forum

You can see that less restriction actually gives the bike more power over the whole range and gets you over 50 horses 500 rpm sooner than stock.

I hope there'll be somebody showing up with results for the 510 too.
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TomCRMI said:
Here is the link to the thread I started in the Husqvarna Forum.

It is all in german and translating it via google unfortunately failed.
If you want you can post questions in english there. A lot of people know english there and everybody is happy to help with any issues.

You see there a diagram from a SMR450 in the second post. Measured is rear wheel power! (with rear tire inflated to about 35 PSI I would think)
Red is stock [email protected] 8243rpm
Blue is a SR-Racing Collector with a Husaberg FE 650 Muffler, rest stock 41.7kW @ 8461rpm

Husky Forum

You can see that less restriction actually gives the bike more power over the whole range and gets you over 50 horses 500 rpm sooner than stock.

I hope there'll be somebody showing up with results for the 510 too.
I spoke with Paul Limma of GP Motocycles and he says the hot set up is using a TC 450 intake cam (keep the stock exhaust cam), stronger valve springs (because the stock ones float at high rpm) and a flat-top piston with a "$550" exhaust system (must be FBF's) and that ups the output to around 60 hp and shovels the whole powerband up the rpm scale.
In this Dyno Run they did nothing except exhaust according to the guy who ran it.
I have already contacted the guy that owns the shop that made the mods to get some more info. Maybe they have info on the 510 as well.

If the stocker 450 runs easily 50 horses the 510 should push a little more than that.

We'll see. The TC cams did always make a huge difference on the older TE610 ... very often though guys just got a TC engine and slapped the 6 speed trans from the TE in. Don't ask me why though ...
Just got an interesting email from the shop guy yesterday.
He said that the Akrapovic exhausts are not really all that good, 1.5 horses gain at max is what he experienced. Not really good for an exhaust that produces about 100db noise.
The only bikes they would really increase power is on KTM??

I don't understand why a lot of race teams use them then.
Maybe he didn't dial in the carburetor good enough then...

He says that SR Racing makes some good power at reasonable noise level. If anybody is interested to learn more I can get you in contact with the guy. He is in Austria.

Tom
hey guys/gals,

i hate to resurrect a post like this as i know exhaust questions get beaten to death........

but, i've got a leftover 05 smr510 in the mail and am researching slip-on exhaust options. going back thru some old post here i see numerous comments about sil, fmf, fbf, doma, etc, etc........but trying to track down a can specific to an 05 smr510 is proving challenging.

questions:

1. is a 05 smr450 slip-on compatable with a 510?
2. i called fmf and they stated they had only a stainless slip-on for a 450, yet i've read here that people are using they're ti4 system.......was their parts guy on crank when i talked to him? does anyone know what fmf slip-ons (p/n's ideally) are compatible with a 05 smr510?
3. how about an fbf slip-on? all i see on their site is a full system for a 450......i contacted them a while back and am still waiting for a response.
4. any other comments are appreciated.....ie. you might want to check out 'brand x'........i'm not concerned with db's (yet), just looking to keep the weight down and improve throttle/gain a few hp'z.

thanks for the help......new to supermoto.....hope to get out to a few trackdays here in/around michigan this year, so maybe i'll see some of you out there......
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speedbagger said:
hey guys/gals,

i hate to resurrect a post like this as i know exhaust questions get beaten to death........

but, i've got a leftover 05 smr510 in the mail and am researching slip-on exhaust options. going back thru some old post here i see numerous comments about sil, fmf, fbf, doma, etc, etc........but trying to track down a can specific to an 05 smr510 is proving challenging.

questions:

1. is a 05 smr450 slip-on compatable with a 510?

Yes.

2. i called fmf and they stated they had only a stainless slip-on for a 450, yet i've read here that people are using they're ti4 system.......was their parts guy on crank when i talked to him? does anyone know what fmf slip-ons (p/n's ideally) are compatible with a 05 smr510?

The can is ti, the headers and mid-pipe are stainless on the FBF/Sil system. It is also something of a pain to get on because you'll need to make three spacers to clear the rear tire on a supermoto. It was made for a trail bike. On the other hand, Husky's race team runs the FBF/Sil headers.

3. how about an fbf slip-on? all i see on their site is a full system for a 450......i contacted them a while back and am still waiting for a response.

To the best of my knowledge they don't offer a slip-on. If a slip-on is what you want and noise tests aren't a problem, then pop on a TC can. It'll add a little power everywhere and is a tapered core design

4. any other comments are appreciated.....ie. you might want to check out 'brand x'........i'm not concerned with db's (yet), just looking to keep the weight down and improve throttle/gain a few hp'z.

None of us have gotten organized enough to be able to compare power outputs on all of the exhaust systems we can get but if I had the money, I think I'd look at the Leo Vince full system because it should be quieter.

thanks for the help......new to supermoto.....hope to get out to a few trackdays here in/around michigan this year, so maybe i'll see some of you out there.......
Maybe we'll see each other but my big trip is to Bonneville to try and set a land speed record.
thanks for the input.....

i talked to motoexotica and dan said they had an fmf factory 4.1SL (p/n 045061) that would work for the 04/05 smr's and a leovince slip on.....both in stainless.

probably end-up going with the fmf as i understand it is slightly lighter than the leo and slightly louder--which i prefer for riding in traffic (wake-up, stop eating and get off the cell). the fmf rep also stated the leo had a removable spark arrestor--FYI.

i also spoke to langston regarding a doma. i was informed that they don't have anymore in stock (for husky 450/510) and don't plan on getting anymore due to the exchange rate. (?)

anyone got a nice used piece for me??? doma maybe??
04 smr 450: red curve stock exhaust + blue curve sr-racing exhaust
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So has anyone had any problems with their stock cans cracking????? I have an 05 smr 450 with oh about 971 miles on it, one track day and some street beating. I have never dropped the bike (amazing being that I cant touch the ground at all) and I have been relatively nice to it, nicer than any of my other bikes. Some how my lower end cap decided that it wanted to crack on the way to the wall and then completely separate on the way home, the thing is blowing packing out behind me! WTF!!!! Anyone know of any dealers in the bay area that might swap it out? Monroe hasn't been much help even though I did give them 7 grand, apparently 60 day warranty means 60 day warranty. Dam race bikes. I was looking on to a new slip on anyway, seems like FMF or leo vince is the way to go. Either way you guys might want to take a look at your pipes, mine was apparently built on a monday.
goddamrat said:
So has anyone had any problems with their stock cans cracking????? I have an 05 smr 450 with oh about 971 miles on it, one track day and some street beating. I have never dropped the bike (amazing being that I cant touch the ground at all) and I have been relatively nice to it, nicer than any of my other bikes. Some how my lower end cap decided that it wanted to crack on the way to the wall and then completely separate on the way home, the thing is blowing packing out behind me! WTF!!!! Anyone know of any dealers in the bay area that might swap it out? Monroe hasn't been much help even though I did give them 7 grand, apparently 60 day warranty means 60 day warranty. Dam race bikes. I was looking on to a new slip on anyway, seems like FMF or leo vince is the way to go. Either way you guys might want to take a look at your pipes, mine was apparently built on a monday.
i haven't heard of a stock '04 or '05 exhaust can crack but i've seem plenty of aftermarket cans crack just cause. Give huskyusa a call and see if they'll get you a new one.
monroe motors is checking to see if they will swap it out for me but really if they cant im not too worried, i was gonna put a pipe on it anyway. ill just have the crack welded up and it will be butter.
goddamrat said:
mine was apparently built on a monday.
...or a friday.
Sorry to hear that. I have a stock can from an 05 450 I'd be willing to part with (i'm running a TC can)
Honestly, you'd be better off with an aftermarket one.
goddamrat said:
monroe motors is checking to see if they will swap it out for me but really if they cant im not too worried, i was gonna put a pipe on it anyway. ill just have the crack welded up and it will be butter.
My can split at around the edge of the input flange on my 05 510. My friends 04 450 split in the same place. They were both re-welded and haven't seen any more probs. It seems not that uncommon.......from my experiences.
SuperRetard said:
I have never been in the top gear in a race, which tells me that low end is key.
Unless you're running around short shifting everywhere you should be able to use extra "top end" power in every gear.........

I know I do.


BTW, "top end" and "top gear" are unrelated.
quick update.....i ordered and installed an fmf factory 4 SL........

fit isn't too good. it would need to be spaced outboard more to avoid the tire on compression (which i don't feel too good about given the single smallish diameter bolt & hanger holding it up--as opposed to the stock 2 fasteners/hangers). the loops for the springs make no sense. there is one on the mid-pipe which attaches to nothing and the top loop on the can dosen't line-up with the stock loop off the header--so its semi-wrapping around (and touching/rubbing) the mid-pipe.

i was also told by the vendor that there were noise restriction inserts (there aren't--but i suppose thats may fault for not double checking fmf's site.)

maybe i'm being bit picky but i was expecting a bit more for the price....

anyone know where can i get an akra slip-on (neither lockhart phillips or parts unlimited could get one) or a doma (called a bunch of places, no one had or could get one)?
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