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Old June 10th, 2024, 06:19 PM   #1
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Name: Eric
Location: Texas
Join Date: Dec 2023

Motorcycle(s): 2007 Ninja 250, 80' KZ650 (RIP)

Posts: 14
Gearing advice

1st of all... Gearing commander is the coolest browser tool I have ever discovered. Moving on.

I just wanted to get opinions on gearing for my drag project. My goals are to get the bike and me down to 525ish and 30hp after I get into the engine. This should will get me around a 90mph trap speed.

My possibly incorrect thinking is that the engine makes peak power at 12,500rpm and I would like to be crossing the 1/4 mile at 13k rpm. From the dyno graph I found it seems like it holds decent power to 13k then falls off the cliff.

A 47t rear sprocket would be hitting 90mph with stock sized tire at 13k in 5th. I don't mind 9k rpm @70 as its only 5 miles into town and just a weekend toy. Thanks in advance for your wisdom.
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80' KZ650 - long gone
01' Golf 1.8t w/big hair dryer

Last futzed with by Omnitech; June 10th, 2024 at 06:21 PM. Reason: Forgot attachments.
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