2014 crf 250 with stock exhaust

I just recently assembled a bike and tuned it I used a 14-1 piston a hand port job no flow testing a cam profile that I used in the carbed models and does not require over size buckets and a spring kit with tool steel retainers .we kept the stock exhaust systema tuned it with vp t4 fuel  I managed 40.6 hp and 21.6 torque not bad for a stock exhaust.Image (193).jpg  click on graph to enlarge

Edited by Ron Hamp

Thanks for posting Ron. What do you expect a exhaust to add to your gains and will you be dialing in a cam set up as well?

I just tested with vp mxro1 fuel and gained .7 of a hp peak but way more over rev the pro 6 fuel or sx4+ would be even better as I said this is the cam im having made for this application it uses a lobe from 1 that I developed in 2006 for the carbed model and a exhaust lobe that matches the same valve action for the 2014 because they  diferent rocker ratios not bad for a $1500 packageImage (194).jpgImage (193).jpg

Thanks for the data, dyno graphs are a great tool, especially a before and after mods test on the same dyno.

The bike kicked ass in an Ohio race this weekend

Do you have the fuel and spark programming nailed down, yet, with an iteration or two or dyno and/or riding testing?

Edited by Eddie8v

:thumbsup: We started this racing thing 11 years ago and all I can say is that's the best 1500.00 I ever spent. THIS BIKE IS TRUELY A ROCKET.

The bike kicked ass in an Ohio race this weekend

 

Do you have the fuel and spark programming nailed down, yet, with an iteration or two or dyno and/or riding testing?

I have ecu maps for this build

Did you do a run completely stock? If so what were the numbers from your dyno? just curious

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