I am trying to get it to have more linear controlled power not so much on or off. Any way to smooth out the power delivery. I have the standard 400 jetting in my bike. It seems to be abit punchy this makes it a little hard in the tight mountaininy stuff where you need a nice smooth power and ridding of clutch. Any help would be really appreciated.
Joined Oct 2005
201 Posts | 0+
Kansas City, Missouri
As a former yz400 rider, I found that lowering the gearing 1 tooth on the countershaft really helped in extremely tight terrain. That bike was punchy, too. Also, a slower acting throttle assy. might give you more control over the power. My 600 is a monster in tight twisties but the gearing does help, and I've still got PLENTY of top-end. good luck, corey :idea:
We Run A '53 Cam,501 Headers,Standard Slide And Needle On Middle Clip,190 Main 35 Pilot And A CD1 Jet That Sits Above The Pilot.
This Really Feels Odd Compaired To The Switch Like Action Before.
Its Nice And Smooth Now......For A Dellorto Anyway
This Really Feels Odd Compaired To The Switch Like Action Before.
Its Nice And Smooth Now......For A Dellorto Anyway
Joined Nov 2001
17K Posts | 774+
Ely, England
if you're on about that vicious snap from closed and nowhere else?
the answer is easy and you can do it for free!
take the slide cutaway from /40 (4mm) to /50 (5mm). get a file and take it out right across making the mouth wider as well as taller.
if you don't like it an engineer will machine the base again and you'll have your 4mm back.
regards
Taffy
the answer is easy and you can do it for free!
take the slide cutaway from /40 (4mm) to /50 (5mm). get a file and take it out right across making the mouth wider as well as taller.
if you don't like it an engineer will machine the base again and you'll have your 4mm back.
regards
Taffy
Joined Nov 2001
17K Posts | 774+
Ely, England
your carb slide has a cutaway that you can see from outside the carb. surely over the years and the many bikes you've noticed this?
pull your carb off, pull the slide out and read the code underneath. it should say "/40" which equals 4mm of slide cutaway. you can measure it by putting it on the edge of the kitchen table and using verniers to measure the mouth opening.
regards
Taffy
pull your carb off, pull the slide out and read the code underneath. it should say "/40" which equals 4mm of slide cutaway. you can measure it by putting it on the edge of the kitchen table and using verniers to measure the mouth opening.
regards
Taffy
Taffy.
Ok I understand what you mean about making cutaway higher. However am not sure about width? But by changing this arent i essentially changing the mixture and what effect does this have? Will this give it more power to smoothen the hit out? Does it mean less performance to the bike or the bottom end ? Can explain as to how the bike will perform once the changes are made to the bike.
Ok I understand what you mean about making cutaway higher. However am not sure about width? But by changing this arent i essentially changing the mixture and what effect does this have? Will this give it more power to smoothen the hit out? Does it mean less performance to the bike or the bottom end ? Can explain as to how the bike will perform once the changes are made to the bike.
Joined Nov 2001
17K Posts | 774+
Ely, England
faktor said:
that's why i explained prior to you doing it that you should take away 1mm across the whole width therefore making the cutaway not just higher but wider as well. think about it, if you take away 1mm all the way over the top of the arch it will continue into the flat base of the slide. this is what you want.
the idea is that the SAME (not more, the SAME) amount of air goes through a larger hole therefore it goes slower, if it's slower, the suction up the atomizer isn't as 'clear' and 'sharp' or 'defined'. lazy signal = lazy engine response.
it won't transform your engine but it'll just soften it where you want it too and no it won't change the mixture-just the response which is EXACTLY what you asked for...
regards
Taffy
Joined Jun 2001
1K Posts | 0+
Pasadena Ca.
Hi Faktor,
I made these changes to my 2000 FE501E.
http://www.husaberg.org/modules.php?nam ... highlight=
It made all of the difference in the world! Pictures of the modified slide are in my Gallery
Joe
I made these changes to my 2000 FE501E.
http://www.husaberg.org/modules.php?nam ... highlight=
It made all of the difference in the world! Pictures of the modified slide are in my Gallery
Joe
Taffy said:
I was under the impression that increasing the height of the slide cutaway did in fact increase the off idle air flow rate just as the slide begins to lift, thereby leaning the off idle fuel mixture somewhat.
Joined Nov 2001
17K Posts | 774+
Ely, England
Chas said:
chas
the engine is sucking the mixture? it either goes through a big hole at a slow speed or through a small hole bloody quickly!
the difference is that the signal down the atomizer is stronger through the smaller hole. the fuel responds very, very quickly.
you open the throttle, it responds slowly therefore the engine doesn't get what it demands.
regards
Taffy
Similar threads
Register CTA
Register on Husaberg Forum! This sidebar will go away, and you will see fewer ads.
Sign Up
