KTM200 /DYNO

[crd...@earthlink.net]

I just had the opportunity to test a couple of my bikes on a rear wheel
dyno at a local street bike shop. After putting on a street tire I ran 33.7
hp on the '99 200exc and 53hp on my '93 CR500. Both bikes are stock exept for
FMF pipes and silencers/SAs. This is rear wheel hp, add 5-7 hp for actual
engine hp. Also, the CR rim is so out of shape that the tire bounced like
hell on the roller, not a true reading. The 200 puts out about 40 hp and it
weighs only 215lbs! No wonder it kicks ass. The most interesting thing about
the test wasn't the hp though. On the printout there's a momentary notch
about half way up the hp curve. When we were running the bike, you could just
barely hear a slight burble. The reading is taken at the bottom of fourth
gear while you pin the throttle to the rev limit (which is beyond peak hp).
The owner of the shop immediately diagnosed this notch as a float bowl
problem, too much fuel in the carb. I took the float off, adjusted the
height, and cleared up the burble. Most importantly, I think that this might
be the reason for the fast idle rev after using the main. The fuel level is
too high and the carb has to "catch it's breath", when it does, the revs go
back down. I did this a few weeks ago and have run a couple of races with
different jetting, the bike doesn't fast idle anymore and it hauls butt.

Have any of you guys changed your float bowl height?
Any other comments on the dyno test?

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[djo...@cyberhighway.nospam.net]

On Sun, 09 May 1999 14:41:05 GMT, crd...@earthlink.net wrote:

> I just had the opportunity to test a couple of my bikes on a rear wheel
>dyno at a local street bike shop. After putting on a street tire I ran 33.7
>hp on the '99 200exc and 53hp on my '93 CR500. Both bikes are stock exept for
>FMF pipes and silencers/SAs. This is rear wheel hp, add 5-7 hp for actual
>engine hp.

Got a curve plot you can mail or post?

David - 99 KTM 200EXC
Email: djo...@cyberhighway.net
Home of the "The Very Unofficial RMD Page"
http://www.cyberhighway.net/~djones/

[SX Fans]

From: crd...@earthlink.net

<< I just had the opportunity to test a couple of my bikes on a rear wheel
dyno at a local street bike shop. After putting on a street tire I ran 33.7
hp on the '99 200exc and 53hp on my '93 CR500. Both bikes are stock exept for
FMF pipes and silencers/SAs. This is rear wheel hp, add 5-7 hp for actual

engine hp. Also, the CR rim is so out of shape that the tire bounced like
hell on the roller, not a true reading. The 200 puts out about 40 hp and it
weighs only 215lbs! No wonder it kicks ass. The most interesting thing about
the test wasn't the hp though. On the printout there's a momentary notch
about half way up the hp curve. When we were running the bike, you could just
barely hear a slight burble. The reading is taken at the bottom of fourth
gear while you pin the throttle to the rev limit (which is beyond peak hp).
The owner of the shop immediately diagnosed this notch as a float bowl
problem, too much fuel in the carb. I took the float off, adjusted the
height, and cleared up the burble. Most importantly, I think that this might
be the reason for the fast idle rev after using the main. The fuel level is
too high and the carb has to "catch it's breath", when it does, the revs go
back down. I did this a few weeks ago and have run a couple of races with
different jetting, the bike doesn't fast idle anymore and it hauls butt.

Have any of you guys changed your float bowl height?
Any other comments on the dyno test? >>

Yes, comment; Thanks!
I liked reading your info! Its good to know.
My 98 KTM 200 M/XC was idleing fast when I would first start it up in the
morning but has stoped doing that now (weird).
No, not messed with the float, only changed the c-clip one seting is all, after
the break-in (run-in) long ago.
Also, how did you come up with 215 LBS, did you weigh it? If so what did you
use?
I liked your piont on the power-weight performance, I was going to get a 125cc
but most people was telling me since I was 41, I would be getting tired too
fast from all the shifting a 125 would need, so get a 250cc, I am glad I got
the 200!
Stan.....1998 KTM 200 M/XC

[pat...@erols.com]

Adam, thanx for another exellent post. 215..... I weighed my 200 and it came
out closer to 230. I wonder what those 250cc motocrossers that's claimed weight
is around 230 REALLY weigh.
Joey

[Rowdy]

crd...@earthlink.net wrote:
>
> I just had the opportunity to test a couple of my bikes on a rear wheel
> dyno at a local street bike shop. After putting on a street tire I ran 33.7
> hp on the '99 200exc and 53hp on my '93 CR500. Both bikes are stock exept for

<snip>

If it's been done on a "Dynojet" dynamometer , could you mail me the
data
files of your runs, please?

If you show up with a floppy disk at your workshop's they should be
able
to copy the files for you (and me :).

I'd like to compare the curve with various runs of my WR400.

TIA
Rowdy
WRZ400F

[davi...@gmail.com]

I am trying to look for a precise hp reading for the KTM exc 200. I did not understand why you first mentioned 33.7hp and further down 40hp. Which measurement is to be considered for the power to weight ratio of the bike? Please explain, I am eager to learn. Many thanks

[John]

hp varies a lot at dif rpm's
something like this helps visualize
http://www.tripleateam.com/dirt/d/126274-1/150SX_CDI_test.jpg

stock new ktm 200exc is 37-39 peak hp (claimed)

i would rather have a low end torque bike
but i ride like an feeble old man

the ktm 200 is a fine bike light agile ect...
you don't need a big motor to go fast

john