• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

449/511 airbox mods

Dan Rich

Dan Rich

Husqvarna
C Class
Ok first question - has anyone done any mods to their airbox on 449/511??

I have the akra exhaust and am about to install a jd tuner when it gets here - is there capacity for opening up the airbox any more for more power and who has done some tests?

Cheers
 
The whole range of the 449's and 511's run the same airboxes complete. The Motorcross bike TC449 has noticable more power than the TE/TXC449 and this bike runs the same power as any modern 450 motorcrosser. i'd be inclined to look elsewhere if you need more power. The standard akra you mention is not a full race muffler. Have a look at a different mufflers like FMF and powerbomb manifold it would appear the exhaust on the 449's including the motorcross bike is restrictive. The TC449 pipe needs more free flowing and the TE/TXC is the same and even more.. Others members on this site have mentioned big power gains from running a different muffler. Until there a dyno chart showing a standard bike against a modified bike (same dyno) its a little difficult to be conclusive. My 449 will be having the akra muffler stripped out and rebaffled along with powerbomb fitted to the standard manifold. I have the jd tuner but am after a little more power like you. A complete FMF exhaust system is quite a bit of $ so for me working with the standard system is the way forward.
 
Barking up wrong tree there, modern day airboxes are way more advanced the XR650 or TE610's. In particular, the airbox design on the 449/511 is very optimized for performance. Of all the things they have modified for factory Dakar bikes, stock airboxes are just fine there and not a choke point. Muffler and header is your first priority, then a tuner if you want to fine tune.
 
Cool, wasn't sure if the air box needed it but knowing it doesn't is one less thing to spend time on - maybe ill try and learn how to valve adjust my 511 instead :) Thanks for the advice
 
What are you saying Bobby? That my 08 610 doesen't have a modern up to date, state of the art airbox?:lol:
 
I forgot to mention take a look at the akra muffler its says on mine its got a 'spark arrester'. this is written on the outside of the muffler but on the left hand side. $30 should remove the spark arrester i've a friend who will be doing this and its cheaper than buying an FMF. All bike manufacturers are interested in is noise and pollution regulations. If by removing the spark arrester all you'd be doing is making the bike to how the manufacturer intended it to be. A jD tuner then sorts the running how it should be and I'm sure the bike will be more reliable and run better - thats my opinion.
 
spud1968 said:
I forgot to mention take a look at the akra muffler its says on mine its got a 'spark arrester'. this is written on the outside of the muffler but on the left hand side. $30 should remove the spark arrester i've a friend who will be doing this and its cheaper than buying an FMF. All bike manufacturers are interested in is noise and pollution regulations. If by removing the spark arrester all you'd be doing is making the bike to how the manufacturer intended it to be. A jD tuner then sorts the running how it should be and I'm sure the bike will be more reliable and run better - thats my opinion.
Click to expand...

yeah mate the spark arrester thing - how is it removed? Id love to just pay your mate the 30$ but I live in oz and youre in the UK. . . bit far to go - does removing the spark arrester really make much of a difference?
 
I've had a short chat with guy about how to remove the arrester and he's not worked on this type of akra exhaust. He does make one off exhausts for road and dirt bikes. My brief was remove the end cap drilling out the rivets. Remove the internals cut out the arrester and alter the baffling to make it more straight throug, but retain the diameter of the final exit hole. Make a removable sleeve to fit inside the final exit to reduce noise if a competition official gets upset with the extra noise. My exhaust guy is of the view with these modifications the bike will still be under 94db and more imprtantly giving a noticable power increase.
 
nice :) - if I get bored one day soon I may just take a drill to the exhaust - is it worth re-riveting it back on ? best way to reattach?
 
Isn't the spark arrester just a screen ? I can see how they might be a little restrictive but here in Cal it's illegal to
ride in the forest without one.
 
I just ordered the fmf ti megabomb with the 4.1 ti muffler ill post some pics by the end of the week and let you know how the power difference is. im debating on the EFI tuner...
 
The akra we got with our bikes is badged/sold as a race muffler. I 'm not into riding a restricted race muffler i want full meaty power and loud so a rider in front can hear me, but not overly loud. If i could photograph the inside of the akra i woould, but this wont be happening. Dyno chart of a before and after with a full fmf would be good .i have a power chart for a te449 with akra fitted on race map 2 and im seriously thinking about dyno testing mine with my soon to be done akra and jd efi tuner. I want more midrange to wheelie the bike over tree logs and big whoops.
 
Ya thats what i want too spud, get some easy wheeling over logs. i just gave my cr250 to my brother and i miss the pop it has on the throttle, i love that two stroke feel pop but i wanted a street legal bike...
 
Check out the bottom half of a '12s airbox. Obviously there is more power to be had by additional airflow. Order it up and bolt it on.
 
Guys, look at what we've got its a BMW engine. The beemer lump was 5 speed and not what we have a 6 speed box, which means shorter gears more acceleration. Husky changed the BMW racer to a trail bike and its a racer a want! If the TC449 can punt out wheelie power dyno figures using the same air box as our TE449's we don't need to look at the air box. I'm still awaiting my fully derestriced akra muffler can we wait to see my view of whats going on with the power. The swing arm on the TE is more like a drag strip racer its long because it connected to the engine and so wheelie power is going to take a lot of bhp and we are competitive against other brands bhp outputs. If the akra and JD tuner work as other forum writers are saying then i'll give you a no bull answer when my akra is returned fully derestricted. Keep your money in your pockets we (including me) need proof via a riders report, or dyno the TE449 can punt out wheelie power at the blip of a throttle.

Without boring you guys there is one area on our bikes i'm looking at and that is the throttle. the next time your with your bike twist the throttle and see how much it turns....it turns a lot. Compair this to my 09 KTM300 we have a slow action throttle on our TE449 in my opinion.

We have the best handling 450 on the market its making good power but like you i'm expecting a bit of a tool being this is a 450. I trade slightly slow turning for stability and agreesive wheelie wheel spinning power for a plush confidence inspiring ride, but i want mine to be a little more wild as i'm a racer (not fast) so working to this goal with your help is what i'm after.

Facts not speculation!
 
I like it spud - I had the same opinion as you regarding the throttle - even before this thread for me to open the thorttle right up takes a fair bit of wrist effort - was looking at a quick turn throttle just to help the bike mechanically with this - as when ive tried really opening the thing up I reckon it has the power . . . Will wait to see your dyno run with the akro (modded) and your JD tuner . . and then look at a quick turn throttle maybe as a mod . .
 
btw side note spud - just bought a g2 quick turn throttle body and cam, will fit it when it gets here and let you know if its worth getting . . .
 
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