The airbox lid thread got me thinking about something... So instead of causing thread drift (which happens WAY to much around here BTW) I started a new thread.

Does anyone here do actual plug chops to check their mixture?

For those that don't know, a plug chop is when you take your bike up to a certain RPM, pull in the clutch, then kill the motor with the kill switch and immediately coast to a stop and pull the plug and check it. You want to do this at various RPM ranges so that you're checking the pilot jet zone, the needle zone then the main jet zone. This will tell you where you're running with your carb setup.

If you're not doing your setup this way, you need too. Just Goggle plug chops and you'll get plenty of detailed information.

Willum
TC

 

Well if the plug didn't take 30 minutes to get out it might be worth it. Man my wife's XT 225 is so easy to get the plug out, its sitting at an angle and takes 10 seconds to get at.

 

I mentioned this as a form of correct Jetting a while back as this is how we always did it in drag racing bikes . Until the NOS came along then it all goes out the window

But Deej you are wright about the plug its a pain in the A......S [:@] And when its hot its a pain in the fingers[]

 

can this test be done without riding the bike... in neutral?

 

the only way i have seen to get the plug out is take the tank off.... or easiest way.... is that what everyone else is doing?

 

Naw, you can get it out with the tank installed. It's just a PITA because it's really slow going and you start running out of room. I'm sure there's a better removal tool than what comes in our kit[:@]

 

well the took kit i got from the dealer wasnt the one that supposed to come with our bikes, i never got one and went back and complained, and he just gave me one, i have never used any of them they are junk, so i dont wanna use them and round a bolt or something, so evertime i have taken the spark plug out i have used a ratchet extension, and spark plug socket.....

 

I've been looking, thinking, searching and talking about a neato little diagnostic tool for our use.

One night I just thought there has to be an easier way to calibrate the jetting on the bike. I mean the racers are using monitors, why can't we? I found some instrumentation that is not all that expensive to put together. The actual instrument can be purchased from Jegs for under $40. Then you need to add an O2 sensor to your exhaust pipe, probably in the head pipe. Or you can just pony up and buy one already put together, also from Jegs.

Now you can have the ability to ride your bike and monitor the A/F ratio. Is it too lean, too rich or just right? Now you can instantly have the feedback to know.

I'm thinking of buying one just so I'll have it to properly jet the carb. Kind of like having your own carb dyno in your shop!

 

i had a air fuel guage on my truck looked like this....