DRZ400 jetting for adv riding?

[NordieBoy]

Your spark plug should let you what jetting you need.

Find a hill and crack the throttle, you want to go for a mile or so with the throttle fully open.
Hit the kill switch, pull in the clutch. Read the plug.

Good article Here on the procedure

Or stick your finger up its bum and see if you get a light smear of poo or the full black finger.

In this case, it's a very black finger.

[monchopper]

Or stick your finger up its bum and see if you get a light smear of poo or the full black finger.

In this case, it's a very black finger.

Sounds a bit rich

[Padmei]

Just replaced the main jet 165 clip 4 notches down to a 155 & clip 3 notches down.
Left the fuel mixture as it was at 1 1/2 turns out

Went for a short ride up the driveway & although it goes well there is no real head snapping backwards at full throttle like before. I take it this is what is to be expected & not something I could have done accidently?

[NordieBoy]

The main jet is tested with full throttle riding.

Hori Bay tomorrow?

[pete-blen]

The main jet is tested with full throttle riding.

Hori Bay tomorrow?

Try this....................................

[NordieBoy]

Try this....................................

Nah, Hori Bay sounds better

[pete-blen]

Nah, Hori Bay sounds better

Again ....
weren't yer in there yesterday?

I'm going up Altmarnoch 2 morrow

[Padmei]

Cheers Pete that's an excellent chart. I've finally got my head around the circuits in carbs now so i'm not quite going in blindly.

Not sure about the weekend but tomorrow is family day.

[NordieBoy]

I'm allowed out tomorrow. Not today apparently.