From Kustom Kraft - Power levels of stock and KK330BB kit.. No details are available about this "stock" bike and we do not know what gear was used for this chart.





From an old thread in here. This is a dyno chart given to a member by the previous owner, when he bought his used KLX, so no details of this "stock" bike are available and we do not know which gear was used for this run.. - https://www.kawasakiforums.com/forum...numbers-38674/

 

IIRC, Bill Blue had a dyno curve on his previous web site showing somewhere near 18 hp stock.

HMF Racing's previous web site had a forum entry where they had before and after dyno run on a new '06 or '07 250 where they re-jetted and piped. This was a good thread as it had pretty detailed instructions for carb removal. This one also showed 18 hp stock.

When I was layed up with a broken leg, I pulled points off various dyno curves into a spreadsheet. Bill's stock curve was no longer out there. The HMF numbers are reproduced in this thread (post 8, 2nd chart). https://www.kawasakiforums.com/forum...numbers-38674/

There's also a "stock bike" curve in post 8 and a link to its source thread. Stock 19.3 hp.



There was some speculation on the KK 16-hp "old" curve that the bike may have been worn. I don't think we have a report from the bike owner on conditions of the bike before the big bore.

 

Thanks IDRIDR. I've updated the top post.. Too bad we don't have information on just how "stock" those bikes were as well as which gear was used for creating the curves...

 

FWIW I would think gearing should make no difference. I would think the dyno set up should be able to work with the drum rpm and engine rpm for any compensation as needed.

If not, any rear wheel dyno results would be virtually worthless unless every test had identical overall gearing. Never would be able to compare bike to bike unless identical. Would work fine for single bike modification comparison though.

 

Well I have seen first hand that running a lower gear inflates the numbers. To me, it makes sense as TRQ multiplication increases with lower gears - and TRQ is all that is actually being measured, HP is a calculated figure off of the TRQ values.. As far as being able to have the dyno compensate for the gear used, I have no idea - wish I did tho..

 

Bingo. That's exactly how it works. Comparing different charts from different places and different bikes is nothing more than entertainment. It's intended to be a tuning tool, and that's what it is.

 

Well not really.. While there are many factors that will slightly effect the numbers of any one particular session, there are only a few that can really skew them. SAE correction takes care of the atmospherics. But only 18psi in the rear tire, an inappropriate rear tire, a rusted, stiff chain, a big change in the sprockets from stock, and a lower or taller gear... Any of those items can do it.. We trust the operators to make sure the chains are lubed and tire pressure is correct. And we trust that the runs are using the gear that is "industry accepted" for the bike in question. In our case, 4th.. If these factors are taken care of , a well maintained DynoJet will produce comparable charts with any other..

 

So would that mean my bike would be tested in 5th?
With 14/51 gears, my 5th is close to stock 4th.
I wish we had a dyno shop here that would do dirt bikes.

 

Well I just don't know how "close" you need to be to a stock overall 4th gear ratio..

At least one of you guys running the BB +Tm+etc really should do-up a run just to see how well or horrible your fueling curve is..