How to tell if I'm too lean?

Doc76 · Post by **Doc76** » 03:08 am Mar 02 2013

I've recently installed Boyesen power reeds in my 92 kdx 250 and researched a lot about jetting. The bike es running line a champ with 155 and 38 jets with my needle clip on the second notch from the top and the air screw 1 1/2 turns out. Everything seems to be perfect and working better than ever, which gives me great pause for concern. How can I tell if I'm too lean? The throttle is crisp and clean, there is no bog or hesitation , no audible ping, so how can I tell if its too lean before I kill the top end ?

diymirage · Post by **diymirage** » 09:00 am Mar 02 2013

sounds like its running fine to me
what other mods are you running?
what altitude are you at?

i think the best thing for you to do is a plug chop to ease your mind

Post by **KDXGarage** » 11:09 am Mar 02 2013

Look at the insulator of the plug. White is lean, brown is correct, black is rich, black and oily is common.

A typical plug chop can help you to determine just the main.

Also, look up "lean bog".

Doc76 · Post by **Doc76** » 11:29 am Mar 02 2013

Thanks going to grab some plugs today to do the plug chop. It's pretty much stock other than the reeds. I'm just a worrier

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