Yesterday afternoon I had my 1990 Honda CBR600F dynoed at the local Honda dealership for one of their summer sale parties. Here is the information regarding my bike:

YEAR: 1990
MILEAGE: 25,800

MODS: K&N filter
Yoshi header pipe with V&H SS2-R muffler
Factory Pro 6 degree ignition advancer

GEARING: stock gearing (44/15)

JETTING:Stock pilots (38s) at 2-3/4 out
Dynojet needles with shims set at stage 2 position (4th clip down)
Keihin 110 mainjets (stock jets)

RESULTS: RUN 1
79.35 degrees F
29.21 in-Hg
humidity 24%
SAE 1.01
Max Power 55.07 HP
Max Speed (4th gear) 105.00 MPH

RESULTS: Run 2
80.69 degrees F
29.21 in-Hg
humidity 25%
SAE 1.02
Max power 56.74 HP
Max speed (4th gear) 106.37

I'm a little dissapointed with the results because I would have guessed that it would have been up around 60-70 rear wheel hoespower. Instead it was dynoed at about 57 RWHP. The guysrunning the dyno said for a bike being 18 years old having 25,000 miles that was pretty good. This the first time I have even seen a dyno in action so I was pretty exited see my bike strapped on top. What are some of your thoughts about my runs? I would of thought the exhaust and advancer would of helped out a bit?

EDIT: Today our airport runway was converted to an NHRA style drag strip for the afternoon.
Here were the results in fastest to slowest.
E/T R/T
1. 14.013 1.016
2. 14.0651.047
3. 14.125 .749
4. 14.143 1.072
5. 14.162 1.183
6. 14.166 1.092
7. 14.1911.280
8. 14.317 1.264
9. 14.368 1.232
10. 14.490 1.074
11.14.55 N/A
12. 14.610 1.279

< Message edited by camoweasel -- 5/25/2008 4:40:47 PM >

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1990 Honda CBR600F
K&N filter (removed air tubes under lid)
Yoshimura header with Vance & Hines SS2-R muffler
Factory Pro 6 degree Ignition Advancer
jetted

 

i am surprised i would of thought you would of had a little more, especially on your top speed. i had a 94 600F2 AND TOP SPEED WAS 145MPH (governed) i never had it on a dyno
but i personally had it going wide open so i know it went that fast. maybe it's time for an upgrade if you are not happy w/the results. it's a nice looking bike.. good luck.

 

was that top speed in 4th gear?

 

top speed was 145 mph!! i'm not positive but i think that the F2 had 5 gears.
but 145 was the top speed..

 

honestly im a little surprised at that too, i would have guessed higher, especially on top speed. but its a nice looking bike.

 

F2 has 6 gears. The fastest I've ever got mine going was an *indicated* 135 mph with -1/+2 gearing. With the GPS around my neck, that was about 115, according to that.

 

Was that 4th gear? I've been moping around all weekend thinking about it. Kind of dissapointing. Do you think its my jetting? It's hard to believe that age is the reason for that power loss?? Going down the track it seemed to pull really hard? At first I kept it wide open after I left the line but later found out that it wenta little faster if i didn't hold it wide open but instead open the throttle slower as the rpms raised?