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fcr 41+

Joined Feb 2007
150 Posts | 2+
SWEDEN
Hallo everyone! my first post in this site,

Have been around and lookt on this site for a while and its the best Husa site around.

Now I had some thing in my head that i need help with so i can sleep at night :? And its start with I was talking to Martin Lind (very nice guy) about his factory bike and he told me they was using a borredout 41 carb to 43.7-44mm (2 diffrent carb) and i hade before lookt at Husaberg.org an seen a 41.8mm and it seems about as big that you can get (whit little safe on the ring in the trottle) maybe a little bigger say 42mm. But the factorybike was so big that the ring woud dessaper? and a also have talked to a guy at Husaberg in Örebro and he tell me they milled the carb to 44mm straight true. The stock carb (or every carb) have a taper in and out like a veniture(maybe not right spell) to get a higer air speed over the needle to get better suction off the fuel. with the ring borred out it just is a 1/3 ring left in the buttom and when the trottle is higher then that the slot for the trottle on the side is just caus turbulens and i just wonder how much better the carb woud be if you had the taper and the ring in and had it like
43,7-44mm in the center. woud a 650 benafit from that carb? seems like the 650 is a little undercarb anyway if you look at smaler bikes running 41 also. or maybe its to big anyway? that do you think?

And Martin told me that they had 76 hp at the backwheel on it :p
 

Cylinder head, inlet air boot and camshaft are far more limiting then that of the carburetor.

Once the above are addressed one may indeed further benefit from a larger carburetor and less restrictive exhaust.

Dale
 
Hi Dale
What would happen if you would fit Nitros or Turbo.. Would that be a possible option for thoughs who want to reach the moon?

Thor
 
ThorsHammer said:
Hi Dale
What would happen if you would fit Nitros or Turbo.. Would that be a possible option for thoughs who want to reach the moon?

Thor

Nitrous is indeed a good option regarding a single.
 
LINEAWEAVER said:

Cylinder head, inlet air boot and camshaft are far more limiting then that of the carburetor.

Once the above are addressed one may indeed further benefit from a larger carburetor and less restrictive exhaust.

Dale

Hi. I know the above but if we are take the factory bike for ex, you would have a little better flow (and function) over the straight true 44?? better top flow and better function and low/mid range due to better (less turbulence) they run big titan valves and race cam, porting, different air-filter-system, lightened crank , mmx rod, 450 ignition. different gearbox, acra exhaust. they say that sr-twin pipe is a pair of hk better but I think they use acra just for they sell that exhaust tru husadelers and it look better if they use them(just me thinking)

the thing is that I have made a carb as i would like it to be. with taper and the ring 43.8mm so i just have to do the rest off the chain to see what i can get :) at the moment im going to change the cam to a ktmcam and have a acra exhaust. the problem is i don't know how the jetting should be? have heard they use OBDTR needle 42 low 190 main does it seems reasonable :?:
Regards
 
Thanks Dale

Sweedishsteel
There you have it no mucking about, just fit Nitros, it will do better than 45mm carb..
:D
Regards
Thor
 
ThorsHammer said:
Thanks Dale

Sweedishsteel
There you have it no mucking about, just fit Nitros, it will do better than 45mm carb..
:D
Regards
Thor

Don't tempt me :twisted: i have a nos system on my gixxer in my garage so its could be done easy. but i think i need to fit a second battery for the fuel pump if so. wonder how long the engine would last do.
 
:D If you do just use the smalest yets.. hum and yar the engine i'm not sure but maybe Dale can tell us how many hours estimate you can get from the engine on nos :D

Thor
 
ThorsHammer said:
:D If you do just use the smalest yets.. hum and yar the engine i'm not sure but maybe Dale can tell us how many hours estimate you can get from the engine on nos :D

Thor

do you think we talk about hours :twisted: i think minutes :D maybe it can work if you have jets like 10hp. you get little cooling from the gas to. but its so unstable if you get a little twink on the fuel. and boom it goes :lol:
 
LINEAWEAVER said:
ThorsHammer said:
Hi Dale
What would happen if you would fit Nitros or Turbo.. Would that be a possible option for thoughs who want to reach the moon?

Thor

Nitrous is indeed a good option regarding a single.

Do you think Dale is wrong? 8O He is like Husa God!! :D
 

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