Any one want to know.

[maicoman009]

AMEN !!! Madscientist.

[ford832]

Hey,my second or third post and I'm disagreeing with someone already-sweet
Previous to the YZ I had a 550 Husaberg and it was an excellent machine-in many ways,superior to any two stroke I've ever had-and in many ways,not.The search for the perfect bike has left me with one conclusion-there is none.I always thought if I had a switch on the bars of the Berg that would transform it to my old 125SX and back again depending on the situation,I'd be in happy land,failing that,I find a 250 2t is a good compromise.

[Recovered]

Hey,my second or third post and I'm disagreeing with someone already-sweet
Previous to the YZ I had a 550 Husaberg and it was an excellent machine-in many ways,superior to any two stroke I've ever had-and in many ways,not.The search for the perfect bike has left me with one conclusion-there is none.I always thought if I had a switch on the bars of the Berg that would transform it to my old 125SX and back again depending on the situation,I'd be in happy land,failing that,I find a 250 2t is a good compromise.

I've ridden a 470 Berg. I loved everything about that bike...except the 4T engine. It had all the characteristics of every other 4T, such as stalling, bogging, nasty hotstarts and if compared to an equal displacement 2T, lacked bottom end.

I stand by my OP.

[ford832]

I've ridden a 470 Berg. I loved everything about that bike...except the 4T engine. It had all the characteristics of every other 4T, such as stalling, bogging, nasty hotstarts and if compared to an equal displacement 2T, lacked bottom end.

I stand by my OP.

If you were riding a 470 that would make it what,about a 2000 model or so?They had some issues-still running the sem ignitions and dellorto carbs if I remember correctly.05 and up are a good machine-the latest generation efi models are better yet.Mine was an 05 and had some carb issues as delivered due to emissions regs in some markets but once I finished sorting it out it ran flawless.No stall,bog,hesitation or anything else.1-2 kicks when cold,one when hot and I never had to touch the hot start once the carb was dialed in.As for bottom end,it didn't have the crack of a 2t but within about 30ft would leave the 250 2t's I rode with(including the one I have now)for dead.Having said that,the gyro effect of the big engine made it difficult to point and shoot in tight woods and though light for a 4t,it was still heavy by 2t standards.Add to that the fact the it would overheat in a tight,snotty race much more readily than a 2t made it annoying at times.It was super stable though,handled good and had enough torque to allow you to dig trenches or shift up a couple gears through the crappy stuff to avoid wheelspin.
Generally speaking,I prefer two strokes but I don't look at things with blinders on so I can see 4t's have advantages in some ways.I also don't believe in judging a machine based on the riders lack of mechanical knowledge or inability to tune it correctly.I've seen some pretty crappy running 2t's as well but I never blamed the inherent design of the engine for it.

[Recovered]

I've ridden a 470 Berg. I loved everything about that bike...except the 4T engine. It had all the characteristics of every other 4T, such as stalling, bogging, nasty hotstarts and if compared to an equal displacement 2T, lacked bottom end.

I stand by my OP.

If you were riding a 470 that would make it what,about a 2000 model or so?They had some issues-still running the sem ignitions and dellorto carbs if I remember correctly.05 and up are a good machine-the latest generation efi models are better yet.Mine was an 05 and had some carb issues as delivered due to emissions regs in some markets but once I finished sorting it out it ran flawless.No stall,bog,hesitation or anything else.1-2 kicks when cold,one when hot and I never had to touch the hot start once the carb was dialed in.As for bottom end,it didn't have the crack of a 2t but within about 30ft would leave the 250 2t's I rode with(including the one I have now)for dead.Having said that,the gyro effect of the big engine made it difficult to point and shoot in tight woods and though light for a 4t,it was still heavy by 2t standards.Add to that the fact the it would overheat in a tight,snotty race much more readily than a 2t made it annoying at times.It was super stable though,handled good and had enough torque to allow you to dig trenches or shift up a couple gears through the crappy stuff to avoid wheelspin.
Generally speaking,I prefer two strokes but I don't look at things with blinders on so I can see 4t's have advantages in some ways.I also don't believe in judging a machine based on the riders lack of mechanical knowledge or inability to tune it correctly.I've seen some pretty crappy running 2t's as well but I never blamed the inherent design of the engine for it.

I agree, but with that said, all of you who are claiming EFI is the fix (it's not) should see the December issue of Dirt Bike. I posted that info in another thread. I also watched a brand new EFI Husaberg flame out...twice...at a WORCS race. Don't get me wrong, I loved the Husaberg chassis. Hated the 4T. Regardless of tune up. BTW, I happened to like the Dellorto carb better than a FCR. I could get the bog/stall/flame outs out of it. But it would only go 30 miles on a tank. Just like every other 450 I know of.

[ford832]

The FCR can be made to work well,it just takes a little fiddling.On one trip I got 92km out of mine with about 2l left in the tank(9.5l tank)On mine,I put a lineweaver jet kit in it,which eliminated the accel pump-or was supposed to.It worked well and increased the mileage tremendously .95% of the time,it was perfect but when you needed to give it a hard crack,it would bog.I ended up putting the pump rod back in but then at low speeds through the rough stuff when you were sort of blipping the throttle,it would load up.I ended up taking the carb off,filling the bowl and activating the throttle.The gas that shot out hit the wall past my workbench about 6ft away-and kept doing it for about 3 seconds.It took just a little throttle to do this so you can see why it was loading up.Interestingly,there was a round boss on the carb body behind the pump cam(almost like it was made for this) so I drilled and tapped it and put in a spring loaded screw and adjusted it to limit the cam travel so I had about a .5-.75 sec pump squirt(as low as I could get it before it wouldn't activate at all)This was the cure in the end.
As for fuel injection,I like it.I've been an auto mechanic for the last 20+ years and well remember standing in a snow bank adjusting choke thermostat tension,choke pull,fast idle etc while the fan blew -20' air over you-brrrr.I don't miss that at all.Mapping issues aside,I think the biggest issue with the bike systems are their simplicity.Most are an open loop system and those that aren't don't have much more than a cts and o2 sensor.It's hard to get an FI system to operate in all situations with such limited inputs.I've never seen it mentioned but what bothers me more about the bike systems is the lack of fuel capacity.Whether just due to the space the pump takes up or tank design or both I don't know but 6.5 l is a pretty skimpy capacity imo.It would be ok for MX but scrambles or off road it would be a curse.