Gs500 only goes +- 130 KM/h (Problem "solved")

[MeeLee]

You probably could put a washer under the jet needle.
It'll raise it a bit, run richer in the mid-throttle positions, and pull more linear.
I always found it pulled ok upto about 5k RPM, then did bad up'till about 7k rpm (est. guess, I can't remember the real values anymore), and then started to pull again at 7+ K RPM to about 9.5k RPM (or something like that).

Raising the jet needle helped the bike to pull better over the entire range, save for top speed, which hasn't changed.

33MPG top speed, 52MPG raised needle @~75-85MPH, 54MPG stock @75-85MPH.

[Krav]

@Meelee
This thread was about wide open throttle performance. Specially at the high end. Therefore the needle is no longer a factor of influence.
Ill know more after a compression test i have on monday, and a dyno run somewhere within the coming month.

@gsJack,

I guess i've gotten used to low RPM's all the time (specially since im missing my tachometer.) Still, it won't get up to 160 Km/h with any form of ease. Therefore i'll still look over the fact that im down on WOT power

[PantheraLeo]

I believe some bikes like the GS where restricted, for reasons of insurance or licenses...
They where not to exceed 30BHP or something, to fall into a smaller category of bikes, if I'm not mistaken.

I'm not running too lean. I did raise the needle by 3mm before, but it was running rich (exhaust smelled like gasoline, and became black over time), so I removed the washer, and now raised it by 1.5mm instead of 3, and it seems to work just perfectly.
Top speed now is 85-87MPH, so about a 4mph increase from before.

Before I felt indeed it was starving, especially around 4-6k RPM.
Now it revs really smooth all across the rev range, and MPG is around 52MPG (with 1/2 of the time riding above 80MPH, and 1/4th of the time stuck in traffic). Not so bad, I'd say; though I wished for better.

The Yamaha R3, or the Honda CB300F look like nice replacement bikes, with better fuel efficiency!

Please, buy a 300, and report back how much better you like it

Probably a lot better!
The Yamaha R3 is about 50LBS lighter, and lower center of gravity, which makes a lot of difference; all the while having the same top speed. Also has 10-20MPG higher than the GS.

The CB300F only goes to 100MPH, but has a much more comfortable upright seating position, and is around 75lbs lighter, and has about 30MPGs more, so yes, any of these bikes will outdo a GS for me.(very rarely will I take a bike beyond 90MPH anyway).

Kawasaki will come out with a naked version of the Ninja 300 next year, something to look forward to as well...

I did a demo day with Yamaha.  I rode the R3, R6, FZ-07 and FZ-09.

I did a demo day with Honda.  I rode the CBR300R, The CBR500R, and the CBR 600 RR.

My buddy has a Ninja 300.

Of the 300 class, I rank them as follows:
R3
Ninja 300
CBR 300R

The R3 pulls noticeably better than the other two, and turns better, handles smoother.  The seating position is more natural (although slightly cramped for me at 6'2").  I rode them just for fun, because there is no way I was going from a 500 to a 300...However, I would like my chances VS a stock version of any of these three new bikes on my modified GS500 any day of the week on a track with turns.  I paid less than 1/3 of the cost of these bikes for my GS and with my mods I've made I am well under half of the cheapest ones costs.  The only benefit any of them have over the GS is that they are more reliable as new machines. 

You might want to do some more work on your GS, MeeLee. It sounds like you've got it out of synch or something if you think these bikes are any faster or better than your GS.

[MeeLee]

I didn't say they where faster,
perhaps the R3 is about just as fast,
but they definitely are better for me.

I like their lower weight. even if it was by 50LBS, and lower center of gravity, makes a lot of difference for me!
In fact, the CB300F almost feels between a bike and a bicycle to me!

@Krav:
I didn't think the thread was about wide open throttle.
I thought it was about not going faster than 130kmh (80 something mph).
Raising the needle gives more power in those speeds below 80MPH, and might give him the push needed to get it going faster.
He mentioned something about not being able to pass the speed plateau on his bikes, but in moments he did, he was able to go upto normal speed limits on his bike.
Raising the needle a bit, might make it easier for his bike to reach to the 130kmh he has trouble reaching, and thus surpassing it easier is also not out of the realms of possibilities.

[Slack]

I didn't think the thread was about wide open throttle.

Maybe you should have read the very first post in this thread before filling it with your mindless babbling garbage about how all you want is an electric bicycle because you don't have the proper skills and techniques to ride a bike like the gs500 which is already VERY light weight with a low center of gravity compared to 98% of bikes on the road.

Maybe you should have read Krav's first responce to your needle suggestion on page 1 when he told you the SAME FN THING! The needle doesn't effect WOT!!!!!!!!!!!! Stop re-posting worthless info if you aren't going to read people's responses to your ideas.

[Krav]

When i want to reach a top speed, its WOT all the way. im not going like: Oh, 7500 RPM, Better open my throttle only 75%. Offcourse not, from 1rpm till 10.000rpm wide open throttle all the way!

[Krav]

I know! I know! old topic alert!!!

For the sake of people finding this topic and wanting to know what my problem was, i found out today.

When i was adjusting my gasneedles a bit richer, i found out that on one of my carbs the little oring at the top was missing!
Replaced the o-ring, rebalanced the carbs, Problem solved!!

Did a test drive right after, and BAM made 170km/h and it would go a bit faster, but i had seen enough.

Soooooooooooooo. Those little vacuum o-rings... Make sure they're there!!!!

[mennobike]

Glad you figured it out!!

Want to post some pictures for the future generations to know what you're talking about?   

[Slack]

Glad you figured it out   

Pics are in the carb stickie. The picture even points to the little o-ring and says, "be careful not to loose this, it will cause lots of problems" or something to that nature.