the DR650 thread

[ER70S-2]

Originally Posted by TrophyHunter

Yes - an FMF SA can be installed. Searching for the part number. I did a light grind on the end cap bolts to break the spot weld, cut 3/8 inch off the center pipe and bolted it up. http://www.motosport.com/dirtbike/FM...RRESTOR-INSERT

I didn't want to grind the welds; if you don't shorten the center pipe, it will look like this. The finished result isn't as 'finished'.

[The Breeze]

Originally Posted by Fitryder

Hello all,

Took my first "longer" ride on the DR today, some 300k.

The first 250 was brilliant! Coming from a cbr600rr I didn't feel like I needed a wheel chair after I stopped after some long stints.

Problem came in the last 50k. The bike started to chug and died. I got off, had a look around, checked fuel, checked the snorkel was breathing, so went to start it again. It did so and away I went. 3km later same thing.
Got off again, check again, waiting 3-4min, started and away I went, this went on another 5-6 times.

Finally some guy was nice enough to stop and we loaded the bike onto his ute, strapped it down and away we went to the mech.
When I got there the mech took it round the block for 3-4k and nothing, so hit the back roads for another 6k and nothing, no dramas at all.

What the hell?
Felt like a fuel problem but fuel flow looked good. He suggested that the highway I was doing open throttle which could have clogged something but urban riding it's more inconsistent. Also when we were loading and unloading on the ute we shook it around a fair bit and it was on some pretty extras angles so many something cleared itself?

I then road home the 7 remaining km no prob, someone highway riding there.

Btw I have the large 30L + safari tank

So now I'm stuck scratching my head.... I'm not the most mechanically minded person so any major work I would have to take it back to the shop. The engine was rebuilt some 500km ago so it's kinda got me stumped.... And very annoyed because now I have a bike I can't trust....

How much fuel did you have left in the tank?? I have the Safari as well. Once you are down to about 1-3 gallons remaining, you can start to get fueling issues. This is because the tank was designed for a carb that is no longer in production on newer DR's (i.e., the fuel inlet to the carb is now higher). This puts the bottom of the "tank wings" lower than to fuel inlet to the carb. It works fine when the tank is full (and for at least 6 gallons), because the fuel creates enough pressure to force the flow. But when it gets low....there can be issues. Some have remedied this by rotated the carb inlet from vertical to a horizontal postition....this will certainly help. If this is your problem, another option is to put a valve on the end of your breather hose (I got mine at an auto parts store). Once you get down to a fuel level in the tank that is causing it to studder, you can then blow into the hose (which pressurizes the tank), then close the valve. If you do this, note that as the fuel burns, the pressure inside the tank is reduced, and eventually a vacuum is created in the tank, which will then cause the bike to studder/stall again (say around 30-50 miles). At that point, you simply open the valve and repressurize the tank. It's somewhat of a pain in the ass....however, I've been in places where I needed the range, and was glad I had it. Like I said, it should run trouble free for around 6 gallons....but you have to work to utilize the remaining fuel.

Curious to know if this is your issue.

The Breeze

[newride]

Originally Posted by procycle

Looks to me like the steel shell from the old seal is still in there. Pry that out and the new seal will pop in just fine.

so if I get out the metal shell, the rubber seal should go in? It doesn't need a new metal shell? So why does the metal need to be in there? The new seal has no metal piece with it.

[jungleplant]

Originally Posted by The Breeze

How much fuel did you have left in the tank?? I have the Safari as well. Once you are down to about 1-3 gallons remaining, you can start to get fueling issues. This is because the tank was designed for a carb that is no longer in production on newer DR's (i.e., the fuel inlet to the carb is now higher). This puts the bottom of the "tank wings" lower than to fuel inlet to the carb. It works fine when the tank is full (and for at least 6 gallons), because the fuel creates enough pressure to force the flow. But when it gets low....there can be issues. Some have remedied this by rotated the carb inlet from vertical to a horizontal postition....this will certainly help. If this is your problem, another option is to put a valve on the end of your breather hose (I got mine at an auto parts store). Once you get down to a fuel level in the tank that is causing it to studder, you can then blow into the hose (which pressurizes the tank), then close the valve. If you do this, note that as the fuel burns, the pressure inside the tank is reduced, and eventually a vacuum is created in the tank, which will then cause the bike to studder/stall again (say around 30-50 miles). At that point, you simply open the valve and repressurize the tank. It's somewhat of a pain in the ass....however, I've been in places where I needed the range, and was glad I had it. Like I said, it should run trouble free for around 6 gallons....but you have to work to utilize the remaining fuel.

Curious to know if this is your issue.

The Breeze

could be water couple drops rolling around and going down the hole once in awhile , did it start right after a refuel

[ER70S-2]

Originally Posted by Fitryder

Hello all,

What the hell?

Btw I have the large 30L + safari tank

t....

The petcocks are so low on the Safari that the fuel line has to make a 'tall' loop to get on the carb inlet. That will trap air and literally vapor lock.

So if the tank is anywhere below half (guesstimate), the bike might stall. Next time it happens add fuel to raise the fuel pressure in the tank (head).

There's a video on how to twist the carb inlet, done by someone at Safari. But I'm late and have to leave.

This is not the issue if it's happening with a full-ish fuel tank.

205'd

[planemanx15]

Took the DR for a ride today with the new TM-40 carb. When I first starting the bike, i let it run for a few mins with the choke on, and when I shut it off, the bike died, Just figured it still cold, so I started again, and just rode with choke off, throttle up. it was all street riding, mostly on the highway, only about 20 miles, and died at one light when I bleeped the throttle. I got home and it felt like the idle was a bit low, so i turned the knob in a little bit it while sitting on the bike. I smelled gas, but thought nothing of it. Got off the bike while it was running, and saw fuel spilling out of the vent hose. I followed the vent hose up, and it was the one under the Idle adjustment (see pic). What is this from? When I shut the petcock off, the fuel stops flowing from the vent hose.

I would like some advice before I start pulling the carb apart, Thanks guys..

[ER70S-2]

Originally Posted by newride

so if I get out the metal shell, the rubber seal should go in? It doesn't need a new metal shell? So why does the metal need to be in there? The new seal has no metal piece with it.

The metal shell is rubber coated, it is the seal, that's why you had so much trouble getting the rubber peeled out of the wheel. Try to bend your new seal, it isn't the rubber giving that stiffness.

[newride]

Originally Posted by ER70S-2

The metal shell is rubber coated, it is the seal, that's why you had so much trouble getting the rubber peeled out of the wheel. Try to bend your new seal, it isn't the rubber giving that stiffness.

ahhhh, Thanks so much.
Now to get that metal piece out without destroying the bearings.........

[planemanx15]

Originally Posted by planemanx15

Took the DR for a ride today with the new TM-40 carb. When I first starting the bike, i let it run for a few mins with the choke on, and when I shut it off, the bike died, Just figured it still cold, so I started again, and just rode with choke off, throttle up. it was all street riding, mostly on the highway, only about 20 miles, and died at one light when I bleeped the throttle. I got home and it felt like the idle was a bit low, so i turned the knob in a little bit it while sitting on the bike. I smelled gas, but thought nothing of it. Got off the bike while it was running, and saw fuel spilling out of the vent hose. I followed the vent hose up, and it was the one under the Idle adjustment (see pic). What is this from? When I shut the petcock off, the fuel stops flowing from the vent hose.

I would like some advice before I start pulling the carb apart, Thanks guys..

Ughh.. The worst kind of problem... I went out to the bike after it cooled and bit and tried to simulate the problem again... No luck

[ADV8]

Originally Posted by newride

so if I get out the metal shell, the rubber seal should go in? It doesn't need a new metal shell? So why does the metal need to be in there? The new seal has no metal piece with it.

The rubber body of the seal is normally bonded to/over that metal part.
That wheel bearing does not look to flash either (an easy replacement)

[GISdood]

Originally Posted by ER70S-2

There's a video on how to twist the carb inlet, done by someone at Safari. But I'm late and have to leave.

This is not the issue if it's happening with a full-ish fuel tank.

Here's that video...

[steve o 77]

Originally Posted by planemanx15

Took the DR for a ride today with the new TM-40 carb. When I first starting the bike, i let it run for a few mins with the choke on, and when I shut it off, the bike died, Just figured it still cold, so I started again, and just rode with choke off, throttle up. it was all street riding, mostly on the highway, only about 20 miles, and died at one light when I bleeped the throttle. I got home and it felt like the idle was a bit low, so i turned the knob in a little bit it while sitting on the bike. I smelled gas, but thought nothing of it. Got off the bike while it was running, and saw fuel spilling out of the vent hose. I followed the vent hose up, and it was the one under the Idle adjustment (see pic). What is this from? When I shut the petcock off, the fuel stops flowing from the vent hose.

I would like some advice before I start pulling the carb apart, Thanks guys..

someone correct me if Im wrong but I think that means the float is set way too high allowing the bowl to overfill.

[ADV8]

Originally Posted by steve o 77

someone correct me if Im wrong but I think that means the float is set way too high allowing the bowl to overfill.

I can't remember if the hose in the picture goes to the bowl drain (probably not) or up via a internal tube to a overflow but.........

My TM40 has done this a few times over the last few years for no apparent reason.
Once was coming into Top Springs (dirt road in the middle of nowhere) and noticed it exiting fuel from a hose.
Stripped the carb but found no obvious signs of the fuel seat not seating.

Another time I came out of a large hardware store to find the bike sitting over a '3 foot puddle of fuel.

Could the float stick once in a blue moon is still ??????????
I never leave the fuel taps on,if it was to run down the inlet tract that might risk hydraulic ing the engine also.

[epix1718]

Originally Posted by steve o 77

someone correct me if Im wrong but I think that means the float is set way too high allowing the bowl to overfill.

Mine did this as well, I removed the carb to adjusted the float and has never occurred again. Pretty simple to do, I was a newb and got it on my first try. Maybe it was just beginners luck

[steve o 77]

Originally Posted by ADV8

I can't remember if the hose in the picture goes to the bowl drain (probably not) or up via a internal tube to a overflow but.........

My TM40 has done this a few times over the last few years for no apparent reason.
Once was coming into Top Springs (dirt road in the middle of nowhere) and noticed it exiting fuel from a hose.
Stripped the carb but found no obvious signs of the fuel seat not seating.

Another time I came out of a large hardware store to find the bike sitting over a '3 foot puddle of fuel.

Could the float stick once in a blue moon is still ??????????
I never leave the fuel taps on,if it was to run down the inlet tract that might risk hydraulic ing the engine also.

It also stripes oil off the cylinder walls accelerating wear on the piston rings and cylinder.

Originally Posted by epix1718

Mine did this as well, I removed the carb to adjusted the float and has never occurred again. Pretty simple to do, I was a newb and got it on my first try. Maybe it was just beginners luck

lol yeah that is pretty lucky. There are lots of techniques for setting the bowl height, I've never done it though.