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Dynos will all give a large variation in power from one dyno to another. Just be sure to run your bike at the same dyno between mods to get an accurate measure of what your gains are. Also, conditions can vary the performance, even with correction applied.

I know on GTO's, heat soak is a HUGE issue when running the car on the dyno. When I let my car cool before a dyno run and only just warm up before making the runs, it puts down ~355whp but if you run it right off the street with no cooldown the engine pulls timing because it senses the higher coolant and intake temps (since the dyno has far less engine cooling than driving) and most people are down as much as 10% power due to this. (Often only posting 320whp where 340-350 is considered average.)
 
As a tech that works in a shop there are MANY varibles that come into play here that can make up 5 hp in a hurry. Chain tightness: if a chain is on the tighter side of spec will rob 1 or 2 hp. Oil: a fresh oil change can get you another 1 hp. Air filter condition: if you have a dirty stock air filter or a over oiled BMC or K&N will decrease performance. Spark Plug condition is another consideration.
Also you have to take in the issues of air temp and humidity at the time of the dyno run.

For the record my O6 GSX-R 1000 produced 151.3 rwhp completely stock.
 
Discussion starter · #23 ·
When I start adding mods to this bike, I'm going to take it back to the same dyno and get a dyno run done everytime I get something added to it (performance wise) since it only cost me $25 to get it dynoed.

Also there is a place in South Carolina I can go to that has a dyno truck come in every few weeks to a month and will prob take it there to see how much of a difference in hp b/n the two dyno machines.


I will let keep you guys updated in this forum when I start adding mods and what not.
In the next week or so I will prob, add a K&N or a BM(spelled that wrong) airfilter, and see if it adds ne hp, Maybe I can get the guy to install both of them and dyno them both to see what the difference in hp it would have
 
I dyno'd my k6 750 after breaking it in using the mototune method. The bike went on the bike with 0 miles. After the final break in run, the bike was allowed to cool completely before checking for horsepower. My numbers were 135.45hp, 58.99 ft-lb and the conditions were 64 deg F, 28.24 in-Hg, Humidity 7%, SAE: 1.03
 
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