Berg FE 390 – OLD Bull Trailriders

This topic contains 13 replies, has 0 voices, and was last updated by Bruce Curtis 15 years, 8 months ago.

Viewing 14 posts - 1 through 14 (of 14 total)

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July 31, 2009 at 3:39 am #96913

scott bocking
Member

The middleweight Berg is on the front cover of the shiny new AMB that just landed in my mail box.

Mmmmmmmmmmm Berg!

July 31, 2009 at 3:44 am #145972

Trent
Member

The guys at KTM were telling me that its not a strick 390 just a sleeved 450 with a shorter stroke

Shame really but we’ll see how it goes.

July 31, 2009 at 4:33 am #145976

scott bocking
Member

If that is the case why would anyone buy it over the 450?

July 31, 2009 at 4:48 am #145978

Greg
Member

singletrackmind wrote:

Quote:

If that is the case why would anyone buy it over the 450?

Why did Ballard sleeve down some of their 450’s to 400’s ?

Why do does Chris Hollis run a detuned engine in his 450 ?

Why do major race teams as one of their setups calm the power delivery out in a 450 ?

Why are FIM looking to get rid of the 450cc class and have a 350 four stroke class ?

Why was Ben Grabhams 2008 Finke winning Honda run a stock engine bar for a vortex, rejet and exhaust system ?

How is it in the motocross desnations 2008 in the heat when the 450’s raced in the same race as the 250’s Ryan Villopoto beat the open class bikes on a 250, on an out door track ?

Because the bike is easier to ride faster for longer and in testing they are quicker for longer its a fact. And if the guns cant use all the bike all the time how are us wood ducks going to do it?

TB

July 31, 2009 at 4:57 am #145979

Trent
Member

Less inertia plus less stroke travel means that it’ll rev faster won’t it?

July 31, 2009 at 5:17 am #145981

Paul
Member

Why was David Knight running a 480cc BMW?

July 31, 2009 at 5:20 am #145982

Greg
Member

WikdBeemer wrote:

Quote:

Why was David Knight running a 480cc BMW?

To run in the open eg; over 450 class

Or because it didnt make enough power to start with as it was a BMW

Nah sorry the first answer I reckon

Hey if you dont believe me read the articles in the mags and ask around

TB

July 31, 2009 at 5:39 am #145983

Bruce Curtis
Member

WikdBeemer wrote:

Quote:

Why was David Knight running a 480cc BMW?

knighter is also a huge Bloke physically, with more talent in his little finger than I have in my whole being, plus he tried everything with the Beemer to make it his, maybe it wasn’t about engine power but harnessing the power to be usuable and still reliable, ie: a 454 chev is a much lazier motor than a 350 chev, same with the 302 to 351 cleveland V8s.

bc

July 31, 2009 at 5:44 am #145985

Paul
Member

Yeah yeah TB, but it begs the question why FIM would dump the 450 class when all the manufacturers mass produce them?

Unless the manufacturers actually want it this way so they can re-invent and re-sell the enduro bike?

I cant see much point in down sizing the bore/stroke of a 450 unless the whole bike is also re-engineered to save weight.
Smaller sleeve and rod wouldn’t save much weight, if any.

July 31, 2009 at 5:57 am #145988

Greg
Member

WikdBeemer wrote:

Quote:

Yeah yeah TB, but it begs the question why FIM would dump the 450 class when all the manufacturers mass produce them?

Unless the manufacturers actually want it this way so they can re-invent and re-sell the enduro bike?

I cant see much point in down sizing the bore/stroke of a 450 unless the whole bike is also re-engineered to save weight.
Smaller sleeve and rod wouldn’t save much weight, if any.

I heard it had a lot to do with speed and power outputs and safety :blink:

read this http://www.motosouth.com/forums/showthread.php?t=20953

or this http://www.vitalmx.com/news/press-release/KTM-Welcomes-FIM-Changes-in-Motocross-Regulations,2395

Here is what Stefan Everts said about the whole down sizing but would he really know much

Stefan Everts, team boss of KTM’s factory team and 10-times MX World Champion is particularly positive about this prospect, saying: “This is definitely a very good move. With development of the latest technology, I am sure that riders will in fact be able to go quicker on a bike less than 450 cc. These will be lighter and more fluid machines that are also better suited to the current track layouts. This is valid beyond the Grand Prix racing scene and it will be excellent for amateur and hobby riders. The 450 cc bike is much too powerful for a amateur.”

TB

July 31, 2009 at 6:13 am #145973

Rolf Goldberger
Member

I agree with those comments TB as I have a 570 Berg and I have to admit it has way to much for me but it is nice to have way to much, probably a wiser choice would be a 390 and I am considering adding it to my Berg stable.

Cheers Gotchya

July 31, 2009 at 6:20 am #145992

Greg
Member

Yeah says I that rides a 650 :laugh: Its got more than I will ever use, although it is milder in it delivery

TB

July 31, 2009 at 8:01 am #145980

Scott Southwell
Member

Trailboss wrote:

Quote:

singletrackmind wrote:

Quote:

If that is the case why would anyone buy it over the 450?

Why did Ballard sleeve down some of their 450’s to 400’s ?

Why do does Chris Hollis run a detuned engine in his 450 ?

Why do major race teams as one of their setups calm the power delivery out in a 450 ?

Why are FIM looking to get rid of the 450cc class and have a 350 four stroke class ?

Why was Ben Grabhams 2008 Finke winning Honda run a stock engine bar for a vortex, rejet and exhaust system ?

How is it in the motocross desnations 2008 in the heat when the 450’s raced in the same race as the 250’s Ryan Villopoto beat the open class bikes on a 250, on an out door track ?

Because the bike is easier to ride faster for longer and in testing they are quicker for longer its a fact. And if the guns cant use all the bike all the time how are us wood ducks going to do it?

TB

And the same reason Ben Grabham has chosen the KTM400 over the 450. Sometimes less is more.

Makes me think if these guys are so much faster on a smaller bike maybe I should be looking at an XR70 or something similar. :laugh:

July 31, 2009 at 8:45 am #146006

Bruce Curtis
Member

I know a Bloke who is really quick in knarly less than handle bar width single track, and he rides a YZ125WR, yep you know who you are old fella….

and he smokes like a chimney and doesn’t mind a 6 pack or two, so it ain’t all fitness.

BC
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