Those stone filters will stop sticks and stones, but not gnat hair.
Also, a larger filter will allow greater flow, less resistance.

You will have to learn your own way about when to flip over to reserve on your bike. With the translucent tank this is easy to gauge, and I will sometimes flip to reserve even with a couple of gallons remaining because I know where my next fuel stop will be.

It's a Fysicks thing...:)
Apple on the head kinda deal....whatever his name was...

The carb inlet is below the tank, but the carb inlet tube does rise in the NW direction. Some people have put the tube in a vise and gently, but forceably 'encouraged' it to go more southward.

It'll all work out, you know your sht.

BTW, CC rocked.

May your bottles of Carta Blanca be lathered in frost.....

I just use indelible felt pen and write on the outside of the engine. Also tyre pressures.

Nor grass seeds - Shade cloth will. Also causes less air to flow. Fly wire will stop most of it .. Both these need a stronger 'filter' for rocks, sticks.


I find indelible felt pen fades over time. Say a year in sunshiine.

Howdy Frank,

I carry 3 feelers with me on the DR: a 4, an 8 and a fat one that mates with the thin 4 for plugs. There's no need for others.

Yes. Who wants to clean a carb on the side of the road with no shoulder when it's raining and dark, and in inhospitible places just because you allowed crap to reach your carb? Plan for the worse, of course.

Ehm. Sorry guys. :blushing: Can someone translate into stupid speak?

Should I be paying attention?

Do I add anything to my list. Or do I delete something? Or do I wait for a conclusion to something.

If so - er.. what?

Gravity sucks
 

No liquid can flow uphill may be the problem, although I seem to recall that mercury has some strange properties - but I digress.

"Uphill" includes the resistance of any liquid to flow through a constricted pipe and the "natural" resistance of the friction of the fluid when it is moving (even when it is moving more slowly than you would like): so the potential is for an airlock to develop.

I can't see how a larger loop of hose would help; it would if there is a definite kink in the existing hose, but otherwise it is just adding more flow resistance inside the longer length of tube.

A fuel pump would be the answer.

Good travelling Mollydog,

Fit a fuel filter is the basic, generic, translation!! After that, it is a case of which one works best.
No charge for the translation service!! :rolleyes2:
BTW, always best to wait for a conclusion.

Oh. phew. Thank you!

Fuel flow
 

Hi all,
First post on a BB.

To solve your fuel delivery problem, a simple, very reliable, vacuum operated diaphram fuel pump will fix it. It is the pump fitted to DR750, XT660 Tenere, XTZ750 Super Tenere (I have all three, plus more). All these bikes have tanks which are below carb level. I run a steel mesh filter before the pump (high flow rate, filters larger bits), and a paper filter after the pump (no little bits make it to the carbs). Very low output pressure, so won't force the needle off the seat.

I haven't tried this (yet), but if anyone wanted a super strong DR with a difference, a DR650 motor in a DR750 frame would be capable. The DR750 frame has bigger tubes everywhere (but doesn't seem to weigh much more; I have the two frames side-by-side). I'm currently fitting a later DR front end (43 mm forks with adjustable preload/damping) and alloy swingarm to the 750 frame.

Does anyone (with an engineering background or tested knowledge) know the pros/cons of tapered roller bearings versus ball bearings in the steering head? e.g. friction versus load capacity, wear, etc.

Thanks in advance....

The advantage of a roller bearing is the load is spread over a larger area than ball bearings. For head bearings this means they shoud last longer and require less adjustments than ball bearing.

These typically fail due to impact damage - forming a line where the roller contacts the surfaces. If you were to use a ball bearing you would have a point contact - much higher loading on the reduced area = highter failure rate.

Same kind of pump fitted to Honda ATs, KTM950 ... they do fail...

------
The 'vacume system' on later model DRs operates the standard fuel cock. If you put on anotehr fuel tank you probably don't have it ..

One of the nice things about the DR is that it's blessed with no fuel pump.

Wow great stuff
 

Just a short note to say thanks for such a great effort collating all this info to help other DR riders. Are the techie tips applicable to all models of DR650?Thanks a lot, Jenny64.