the DR650 thread

[Lil' Steve]

Originally Posted by bajadawg

All this talk of jetting and I have yet to see any dyno numbers. If I wanted that much more power I'd get a XR650 or KTM. I love my 57mpg's. I don't need a safari tank to cover 270 miles. I'll do work to the suspension and get a steering stabilizer. That'll make the bike faster off road. I'll probably get the supertrapp pipe so I can have the same back pressure as stock and drop some weight. My two cents.

Jeff from Procycle has done lots of dyno testing with various mods to the DR. Here's an air filter dyno run from his site...






And here's a stock exhaust vs FMF pipe run...

[vnp514]

Ok,

Since we've got the snow, ice, cold, etc. still going on here, I figured I'd check my NSU on my 2002 DR. Before I do, here is what I've learned doing some searching around:

You can lay the bike on it's left side to do this procedure.

The side cover bolts are different sizes-pay attention here.

The bottom bolt is easy to get out, the upper bolt is a booger to get out. Might be able to use a box end wrench and attach a screw driver bit of the proper size to get to it.

I plan on just taking mine out for piece of mind. The only thing I won't have is the green neutral light-right??

Has anyone done any pics on this job from start to finish? Any other pointers before I start this task?

Thanks

Pete

[procycle]

Originally Posted by bajadawg

Awesome. Thanks for the info. For me the increase in power doesn't seem like it would be worth losing 50 miles in range.

You don't have to lose any fuel mileage if the jetting is done properly.

[AWM]

Originally Posted by vnp514

Ok,

Since we've got the snow, ice, cold, etc. still going on here, I figured I'd check my NSU on my 2002 DR. Before I do, here is what I've learned doing some searching around:

You can lay the bike on it's left side to do this procedure.

The side cover bolts are different sizes-pay attention here.

The bottom bolt is easy to get out, the upper bolt is a booger to get out. Might be able to use a box end wrench and attach a screw driver bit of the proper size to get to it.

I plan on just taking mine out for piece of mind. The only thing I won't have is the green neutral light-right??

Has anyone done any pics on this job from start to finish? Any other pointers before I start this task?

Thanks

Pete

See what you can find here!

http://dr650.wikia.com/wiki/Main_Page

[LukasM]

Originally Posted by vnp514

Ok,

Since we've got the snow, ice, cold, etc. still going on here, I figured I'd check my NSU on my 2002 DR. Before I do, here is what I've learned doing some searching around:

You can lay the bike on it's left side to do this procedure.

The side cover bolts are different sizes-pay attention here.

The bottom bolt is easy to get out, the upper bolt is a booger to get out. Might be able to use a box end wrench and attach a screw driver bit of the proper size to get to it.

I plan on just taking mine out for piece of mind. The only thing I won't have is the green neutral light-right??

Has anyone done any pics on this job from start to finish? Any other pointers before I start this task?

Thanks

Pete

When you lay the bike on the side, either put something under the frame near the shift lever or take it off. Otherwise it will bend as it contacts the floor.



Use a piece of cardboard or similar and stick the screws in it using the layout of the clutch cover:



I recommend taking off the foot peg and rear MC so you can swing the brake pedal out of the way. Otherwise you have to take the pin out of the pedal pivot which is a bit more complicated.




If you can't access the upper NSU screw you can take the clutch off easily even if you don't have the special tool. Just put the bike in gear and block the rear wheel (I used a broom) when you take off the nut.

The rest is straight forward, get back to us if you have any questions.

Lukas

[miniroot]

Originally Posted by LukasM

Use a piece of cardboard or similar and stick the screws in it using the layout of the clutch cover:

Neat! Both in the "good idea" sense and the "anally retentive" sense.

;)

I usually just lay them out in order on the floor. Then, I usually forget and boot them across the floor. And then I usually spend fifteen minutes swearing.

[LukasM]

Originally Posted by miniroot

Neat! Both in the "good idea" sense and the "anally retentive" sense.

;)

I usually just lay them out in order on the floor. Then, I usually forget and boot them across the floor. And then I usually spend fifteen minutes swearing.

Yeah, I used to laugh at tips like that as well. Then I realized what I mess I am and that things tend to get in the way. I took that picture 3 weeks ago and the bike is still in pieces. Found out my clutch hub is shot so I'm still looking for a cheap used one.

So more like 15 minutes of swearing and then a few hours trying to figure out what goes where. And in the end there are still a couple of screws left over...

[McB]

Originally Posted by LukasM

.

And in the end there are still a couple of screws left over...

I usually count those as 'weight reduction measures'.

[miniroot]

Originally Posted by LukasM

Yeah, I used to laugh at tips like that as well. Then I realized what I mess I am and that things tend to get in the way. I took that picture 3 weeks ago and the bike is still in pieces.

Aye, that's the rub. My workshop was a no-go area for a month while I waited for parts to complete my DR200 rebuild. I had the engine laid out in "chronological order", anti-clockwise around the room, on all but six square feet of workbench.

My father used to take photos as he tore an engine down. That was back in the days of real celluloid film, as well. With digital photography so cheap, I don't know why I didn't do the same.

But that really is a good tip, with the cardboard.

Found out my clutch hub is shot so I'm still looking for a cheap used one.

Are DR650 hubs that expensive? I spent months fannying around trying to avoid the cost of a new DR200 hub, possibly at the expense of the engine (see above) and certainly at the expense of my blood pressure. Turned out that a new hub was something stupid like NZ$50. I spent more money on replacement friction plates.

[Rusty Rocket]

Use a piece of cardboard or similar and stick the screws in it using the layout of the clutch cover:



A picture is worth a thousand words. I was going to try to describe this exact tip in words. Thanks you saved me from typing alot.

I have done this exact same thing for years. I still have a piece of cardboard lying on my garage floor from when I last checked the NSU screws.

BTW, just got my RaceTech .46 springs for the forks from Cogent. (NC Rick)

[vnp514]

Lukas,

Thanks a bunch. Some great tips AND PICS!!

Pete

Originally Posted by LukasM

When you lay the bike on the side, either put something under the frame near the shift lever or take it off. Otherwise it will bend as it contacts the floor.



Use a piece of cardboard or similar and stick the screws in it using the layout of the clutch cover:



I recommend taking off the foot peg and rear MC so you can swing the brake pedal out of the way. Otherwise you have to take the pin out of the pedal pivot which is a bit more complicated.




If you can't access the upper NSU screw you can take the clutch off easily even if you don't have the special tool. Just put the bike in gear and block the rear wheel (I used a broom) when you take off the nut.

The rest is straight forward, get back to us if you have any questions.

Lukas

[Watson]

Originally Posted by awm

.....My point was that i have seen bikes run'n way to lean burn holes in pistons!Suzuki sells bikes that run lean to pass emissons.If you change pipes or air cleaners etc without reading the plugs for a proper fuel mixture there is a possibility of that happen'n!

....glow'n red pipes etc,is not a good thing

I wonder if anyone has taken a piston-powered aircraft approach to managing fuel/air mixture. Mixture controlled by the pilot - proper adjustments estimated and made based on rpm drop and exhaust gas temp....if my memory serves me correctly...

[STARSKEY]

Originally Posted by Watson

I wonder if anyone has taken a piston-powered aircraft approach to managing fuel/air mixture. Mixture controlled by the pilot - proper adjustments estimated and made based on rpm drop and exhaust gas temp....if my memory serves me correctly...

It would take a new breed of DR650 rider I think. A lot of us like this bike because it's simple and doesn't have too many guages and switches and lights and dials.

Imagine doing all that watching and adjusting while bashing along down a dirt road. Too much thinking for my brain while riding. I'm lucky just to remember "bars up, tires down.....bars up, tires down.......bars up, tires down....."

[talbertnz]

Originally Posted by LukasM

... And in the end there are still a couple of screws left over...

Glad to hear im not the only one with that problem....

[AndrewL]

Originally Posted by Watson

I wonder if anyone has taken a piston-powered aircraft approach to managing fuel/air mixture. Mixture controlled by the pilot - proper adjustments estimated and made based on rpm drop and exhaust gas temp....if my memory serves me correctly...

EGT is only good measurement for relatively static rpm and load - that is not a MC environment unless droning down a highway. EGO is the go - but you won't see them in aircraft due to the amount of lead, even in the LL stuff.
Some Bing aircraft carbs have adjustable needles, but if that particular setup were applied to a MC carb, it would be virtually unusable due to cable friction... but it can be done.
Easiest and quite possibly cheaper (if you place value on your time) solution would be fuel injection with wide band EGO and closed loop operation at low loads. No altitude problems either if done right. For the keen, Megasquirt and Microsquirt controllers are capable of doing this. Big problem is finding the power to drive the electronics and fuel pump.

Cheers