great 250R pipe comparison

[CorvetteZ06]

Hey guys, while surfing the net yesterday, I came across this, I remmeber reading it a while back when it came out, but I had forgoten about it, pretty good article:

http://www.atvsource.com/articles/product_reviews/2001/102901_250r_dyno_run.htm

[headache]

good article!!

[lee37vernon]

yeah , interesting to see how well the fatty did !! . if you have a stock bike thats the way to go ..

[CorvetteZ06]

I love my FMF fatty, no real hard hit anywhere, just a nice smooth power improvemnt across the entire powerband!

those dynos dont seem legit...i mean the 250 revs past 6 thousand...plus most of the pipes make the most hp at 3 thousand RPMs??? :rolleyes: :confused: but i dont look at 250r dynos much....anyone got any other dynos?

[86 Quad R]

Originally posted by CorvetteZ06
just a nice smooth power improvemnt across the entire powerband!



en thats exactly why i love mine. compliments my 4mil strk with good low end torque but also has a rev to the moon upper end. :devil:

[punker69q]

Originally posted by Honda86
those dynos dont seem legit...i mean the 250 revs past 6 thousand...plus most of the pipes make the most hp at 3 thousand RPMs??? :rolleyes: :confused: but i dont look at 250r dynos much....anyone got any other dynos?


If you read the article, they say that the graphs are only displaying half of the rpm for a reason that I don't remember.

ok i read it over....so 3 thoudand RPM is really 6 thousand....makes sence now :D Looks like sparks MX pipe did the best...i hate my LRD adjustable

[atvmxr]

i havent even read the article, but if I was to guess a two stroke rpm will show half because it fires twice as much as a four stroke. Usually dynos get the rpm from the spark plug wire and on a four stroke they fire only 1/2 the time, so if the dyno was setup for a four stroke........ it doesnt matter just thought I would offer an opinion

[punker69q]

Originally posted by atvmxr
i havent even read the article, but if I was to guess a two stroke rpm will show half because it fires twice as much as a four stroke. Usually dynos get the rpm from the spark plug wire and on a four stroke they fire only 1/2 the time, so if the dyno was setup for a four stroke........ it doesnt matter just thought I would offer an opinion


I don't think this is the problem, because if it reads 2 rev to each spark (4 stroke), a 2 stroke would read twice as high as they are really turning.

[86 Quad R]

it was meerly a setting/toggle he forgot to set in the software before he began the testing.