check the side stand ignition interlock switch too

Does the stand interlock switch allow the bike to fire but not run?

in my 600e interlock allows one spark, so it sounds like it "wants" to start


still, could be intermittent contact, so just by pass it to be sure


have you checked you have good fuel flow going into carb?

It fires for a couple of seconds so i don't think the stand switch is at fault but I'll bypass it anyway as I don't have the original stand and the replacement doesn't have the bit that activates the switch.

I don't really know how to check if I've got good fuel flow to the carbs. It fires nearly every time, just won't tick over or rev. As soon as it does I can start it again.

Could be air breather. Try with the fuel cap off.

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Various bikes in differing states of repair.

unscrew the carb bowl drain plug, place a container bellow the carb and open the fuel tap.



you should see a decent constant flow from the hole.


have you tried to simply raise the idle stop adjuster so it revs higher?

Quick and dirty float level setting when you don't know correct is "level".

"Assuming" it's a relatively standard carb with a pair of floats:

In other words turn the carb upside down, hold the floats up with your finger tips, lower till the tab that pushes on the float needle just touches it. The floats should be visibly in some way more or less "level". Bend the tab as need to do that. Ideally of course find a manual with the correct procedure and setting.

Re idle stop adjuster - I'm assuming you use the throttle to try and keep it running, so the throttle stop / idle adjuster shouldn't make any difference.

Re mixture screw - a generic setting to start without a manual for the right setting is about 1 to 1 1/2 turns out from fully in - LIGHTLY seated in - tight just ruins the seat, so gently.

Turboguzzi's comment re unscrew the float bowl etc is excellent - that makes sure fuel is getting all the way to the float bowl. From there it's making sure the carb jets are all clean, and of course correctly assembled, good o-rings etc.

Finally - GET A MANUAL! It will make life so much easier. I've been wrenching for over 50 years, and recently bought a new-to-me DRZ400E. It came with a factory service manual, and I bought a Clymer manual as well, as they are often more detailed on procedures. You can't have too much info!

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Grant Johnson
Seek, and ye shall find.
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Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com