Is there anybody from Denver, CO in this forum? - Honda CBR250R Forum : Honda CBR 250 Forums
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post #1 of 9 Old 09-25-2012, 12:41 AM Thread Starter
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Is there anybody from Denver, CO in this forum?

I am trying to find out how bad 5,280 feet can affect the CBR250R performance wise. Keep in mind that I'm at 200 pounds without gear.
Thanks in advance for any reply.
Baby_VFR
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post #2 of 9 Old 09-25-2012, 12:55 AM
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While the EFI will adjust the fuel mixture for altitude, you still end up losing about 2.5% horsepower for every 1000 ft above sea level. I live just outside Santa Fe, NM and do most of my riding between 7000 and 10,000 ft. Had mine topped out at 98 MPH yesterday afternoon, at about 6800 ft. At altitude you have to be willing to run the RPM's up where this engine is making its power. I installed an FMF Apex slip on, and pulled the airbox cover, which has helped it to breath a little better. The next change I'm going to try is a 13T front sprocket, to give 3rd and 4th gear a little more get up.
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post #3 of 9 Old 09-25-2012, 01:06 AM Thread Starter
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While the EFI will adjust the fuel mixture for altitude, you still end up losing about 2.5% horsepower for every 1000 ft above sea level. I live just outside Santa Fe, NM and do most of my riding between 7000 and 10,000 ft. Had mine topped out at 98 MPH yesterday afternoon, at about 6800 ft. At altitude you have to be willing to run the RPM's up where this engine is making its power. I installed an FMF Apex slip on, and pulled the airbox cover, which has helped it to breath a little better. The next change I'm going to try is a 13T front sprocket, to give 3rd and 4th gear a little more get up.
Would you be so kind as to tell me how much do you weight? Just to have an idea of what I'll be dealing with.
Thanks again for your help not to mention your patience with my weird question.
Best regards.
Baby_VFR
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post #4 of 9 Old 09-25-2012, 01:11 AM
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With full riding gear, I tip the scale at 187 lbs.
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post #5 of 9 Old 09-25-2012, 02:12 AM Thread Starter
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With full riding gear, I tip the scale at 187 lbs.
Well, maybe I am in need of a diet.
Thanks again.
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post #6 of 9 Old 09-27-2012, 04:41 AM
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Quote:
Originally Posted by Baby_VFR View Post
I am trying to find out how bad 5,280 feet can affect the CBR250R performance wise. Keep in mind that I'm at 200 pounds without gear.
Thanks in advance for any reply.
Baby_VFR

I actually bought my bike down in Denver, at Fey Meyer's. Having not ridden the bike at sea level, I have to real comparison, but I can tell you it does fine out here. It does struggle up the passes at highway speeds, but has no problems going up winding mountain roads at low to mid speed. I ended up driving mine from Denver to Avon, and didn't have any real issue.

_______________________________
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Tri Color - avg. 77.2mpg

"Avoiding danger is no safer in the long run than outright exposure. Life is a daring adventure or nothing at all."
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post #7 of 9 Old 09-27-2012, 05:03 AM
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I commute from Littleton to Boulder every day. 185 and 5'9". I can count on going 75 mph no problem on c-470. On steep hills i enter at 70-75 and hit the top at around 65-70. Worst mpg was 66. 100% stock bike and about 15 lb backpack of crap every ride.

This is all without tucking. Tucking behind the windscreen will significantly improve those numbers.
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post #8 of 9 Old 09-27-2012, 05:07 AM
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Also, 85 octane gas seems to be sufficient. No knocking sounds at any rpm or load. Your results may vary.
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post #9 of 9 Old 09-28-2012, 09:34 PM Thread Starter
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Thank you very much guys. The only thing I didn't like about this bike was the super upright position but I found a fix for that. It says risers in the title however if you read the description;

Woodcraft's new Honda CBR250R riser clip-ons lower the handlebars 1.5" over the stock clip-ons (measured at end of the bar) . They provide a more aggressive riding position without interfering with the bodywork. Perfect for anyone racing or just looking for a sportier ride on their CBR250R.
www.woodcraft-cfm.com - HondaCBR250RRisers
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