[hondafan]

nvrmnd

[crfsonly]

hondafan...on the surface jetting seems like it would be simple...it can be pretty complex. one thing you have to be careful of is running someone else's jetting just becuase it's working great for them.

jetting basically determines how much fuel is delivered in your air-fuel mixture. the ratio air to fuel is important and if done incorrectly can actually damage your engine (lean condition). a lean condition is when there is too much air (O2) and a rich condition is when there's too much fuel.

to get more power from a bike one of the options is to increase the amount of air-fuel mixture that gets in the cylinder. to do this you can reduce air restrictions and hence more air will be drawn in increasing the amount of air in the mixture (effectively leaning it out). to add more fuel you need to change the jet to increase the fuel delivery to match the increase amount of air.

the challenge is a lot of factors determine the amount of O2 drawn into the cylinder besides just intake restrictions. these are altitude, temperature, humidity, etc. so, what works for me at see level doesn't work for someone in denver. what works for me in the summer may not work for me in the winter.

best thing to do is talk to locals with the same bike and setup and experiment with a range of jets. also, big gun has a jetting chart to get you started. it's at http://www.biggunexhaust.com/

good luck and let us know how it goes.

crf's only

[hondafan]

Hello CRFs only! I tried the big gun website and clicked on JETTING and started loading the file but every time i try it says "there was an error processing this page"??? Hope i dont have a virus!! . maybe i should try going to the library and doing it. What should i do?? I have adobe acrobat installed.

[crfsonly]

hondafan...send me an email at info at crfsonly dot com and i'll reply with big gun's jetting tips file.

crf's only