Akrapovic FS570

Slime · Nov 8, 2009

Gazza said:
Slime said:

Modified cylinderhead, 44mm throttle body, completely full exhaust with power bomb and akra race silencer, no cylinder gasket, modified piston, 450map (10500rpm) remapped for 570. No problem with the bike so far, raced whole supermoto season.

Click to expand...

how often do you pull the head off it ??

have you had any headgasket leakage into the water system and pressurising it ?

what head gasket do you use stock or different ? solid copper ??

still 565cc ?? have you tried a 610cc kit ??

I have only done that once after final tuning, only to change valve springs.
Yes and we now use glued head gasket and working so far.
Using stock head gasket.
Yes still 565cc, other guys tested 590 but didn't gain anything on that.

Slime · Nov 8, 2009

madero said:
slime
that must be a race weapon!!

What was yoyur start HP ??

and you gained 13 hp??

greets madero

We started out at 50hp stock and now have 63 rwhp.
Yes 13hp gain so far.. hoping for more soon with new camshaft and bigger throttle body.

Slime · Nov 8, 2009

DaleEO said:
After re reading this thread I realized that it is no wonder your bike is running lean.

Looks as though you have dramatically increased compression through the elimination of the base gasket, "modified piston" (high compression?), modified the head (what did you do there? Increase compression? unshroud the valves?) increased throttle body size, and a better flowing exhaust system, and raised the rev ceiling to 10,500. It only stands to reason that you would need more fuel.

And speaking of fuel, what fuel are you running?

What do you think the compression ratio is?

Hey..
I don't have any problem with my bike its mapped correctly

You must have misunderstand something because its "Slider" that have a problem with the mapping.

Cheers

DaleEO · Nov 8, 2009

Slime said:
DaleEO said:

After re reading this thread I realized that it is no wonder your bike is running lean.

Looks as though you have dramatically increased compression through the elimination of the base gasket, "modified piston" (high compression?), modified the head (what did you do there? Increase compression? unshroud the valves?) increased throttle body size, and a better flowing exhaust system, and raised the rev ceiling to 10,500. It only stands to reason that you would need more fuel.

And speaking of fuel, what fuel are you running?

What do you think the compression ratio is?

Click to expand...

Hey..
I don't have any problem with my bike its mapped correctly You must have misunderstand something because its "Slider" that have a problem with the mapping.

Cheers

OOOps! My mistake! Sorry about that.

Dale

madero · Nov 8, 2009

Slime

63HP s heavy.

heard some figures of 70pk, in germany,but was with a big bore kit.

Thanks for sharing the info.

Madero

slider · Nov 9, 2009

ok thanks for info i let know when i know more

mechanix · Dec 9, 2009

so far about the mapping... but does anybody know the differnce about these two akras cause they are both for the new models.
1.

2.

Clay · Dec 9, 2009

mechanix said:
so far about the mapping... but does anybody know the differnce about these two akras cause they are both for the new models.
1.

2.

About $250.

Number one is "an entry level tuning component". Number 2 is "for riders looking for the finest available aftermarket exhaust system". This is the one with the carbon fiber end. I believe they weigh about the same. I have not seen any figures on power increases on either. From what I can tell on the demos I have had, the Akros don't offer much power gain but do offer a substantial weight savings. Please remember I am mainly riding in the woods in the eastern US and not in fast conditions or on the street. I think the Akro would most likely increase the bikes power in the upper rev ranges....but I could be wrong.
Clay

ints · Dec 13, 2009

And which cams you plan to use?
Ints

Quickmick25 · Dec 28, 2009

Slime said:
slider said:

Thats wright that the horsepower doesn't matters but what about the bad air-fuel combination thats what matters me?

Click to expand...

I don't think its to much air because if you for example do good mod to the spoilers you can gain around 2hp more so the bike don't get enough air. So your answer must be less fuel then. If so you should start to add around 2-3% at full throttle opening 8000rpm.

Hi,

Wich mod's did you on the spoilers??

mechanix · Dec 28, 2009

at the top end of the seat, between tank and seat it is possible to open the airbox that the air will flow direct to the filter. but at very dusty tracks you have to clean the filter very often. offroad i still use the stock spoilers.

stock spoiler

open spoiler

remove the seat, make a line with a felt tip along the tank and cut away the edge.

hope you will understand my bad english.

Quickmick25 · Dec 28, 2009

Hi mechanix,

Thanks,but i think it's on ly a good idea on Supermoto tracks and not so for Enduro...

slider · Feb 16, 2010

We changed the the mapping with the husaberg setting tool and the bike has 60bwhp now :cheers:

993sdad · Feb 18, 2010

i have that tool what settings did u use,

Akrapovic FS570

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