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Old 05-29-2012, 08:33 AM   #65071
local1
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Location: Athens,Tennessee
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Quote:
Originally Posted by Adv Grifter View Post
Rot Row! Was there water in there too?
Probably the Carb Float needle is leaking, allowing fuel to migrate into crankcase. Not good. Good reason to shut off fuel after riding.
What year is your bike?
Do NOT attempt to start bike. No idea what sort of damage this could have caused. Drain everything, let dry until ALL fuel (and water?) has evaporated.

Pull carb, clean and rebuild. The Clutch may be ruined if it sat in fuel or water. Replace. The DR uses a Stator (like a generator) and it lives in Hot oil. But fuel? Might have ruined it, dunno. Looks like a big job. Oil in air box is not unusual and not serious. Someone probably overfilled the bike with oil. The main crankcase vent will pump excess oil into air box. Just clean it up and learn to check oil. You may get lucky ... but no guarantees.
I didnt see any water so maybe i will get lucky?? i can only hope at this point..thank you for the fast reply,this good buy i got is going to make me old before my time...the older i get the more i believe that you really get what you pay for.
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Old 05-29-2012, 08:46 AM   #65072
Motodeficient
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I thought that TM40 throttle pull was pretty stiff when I installed it last summer. I am used to it now I guess because I do not notice it anymore.
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Old 05-29-2012, 08:52 AM   #65073
local1
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Quote:
Originally Posted by ER70S-2 View Post
Now that Grifter has given you the worse case scenario, I'll give you another possibility.

Edit: If your fuel tank was already bone dry, what I say below doesn't matter, it probably is gas leaked down into the engine.

Define "at least half a gallon of gas/oil behind the cover". If it was truly a gas/oil mix, Grifter is right. But if it was just oil, there's nothing wrong. The 'generator and things in there' are supposed to be in crankcase oil, contrary to what one would think is ok to do with wiring and stuff.

If the bike has a stock petcock (see pics), the chances are at least 'fair' that fuel didn't leak down into the engine (unless the lever was left pointing straight down like the second pic, then it is gas/oil). Simple check: if there is still fuel in the tank, turn the petcock to RES (first pic), remove the larger fuel line from the petcock, gas should NOT flow. (it shouldn't leak in the ON position either) If it dribbles or leaks, you and Grifter are right, your engine is full of a gas/oil mix.

Nothing is wrong with an oily airbox for the reason given by Grifter.

Gas leaking into the crankcase doesn't kill the motor, what you do/did next is important. Tell us what you find, inquiring minds want to know.



i didnt do anything other then let it drain.i only had a couple tools with me,actually just enough to loosen the cover.
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Old 05-29-2012, 10:29 AM   #65074
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Quote:
Originally Posted by Motodeficient View Post
I thought that TM40 throttle pull was pretty stiff when I installed it last summer. I am used to it now I guess because I do not notice it anymore.
As I mentioned, I only spent an hour riding the TM40 equipped DR650.
I probably could have adapted but I just thought it was wrong ... and I knew riding it off road would wear on me over time/miles.

FIX?
Couldn't the return spring be swapped out for a lighter one? I've had two bikes with Keihin FCR carbs ... both light, easy throttles.

Also interesting to note that before F.I. came along ALL the Japanese motocross bikes ... and all KTM ... used the Keihin FCR carbs ... not the Mikuni TM40. In fact, I can't recall any OEM using the TM40 in years.

Wonder why?
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Old 05-29-2012, 11:03 AM   #65075
Mongle
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Quote:
Originally Posted by DockingPilot View Post
thanks for all the feedback fellas.
the cables are routed correctly and the throttle snaps back as it should. its just after the eighth hour or so in the saddle i really start to notice it. the last 60 miles home was slab and just holding the throttle open for a good hour was wearing me down. even though i dont like them i would have done almost anythingfor a throttle rocker at that point.
guess i better start squeezing a tennis ball in my spare time. lol

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Having broke my right wrist being dumb as a chump, all day rides give me wrist pain. I bought something like this. Mine has velcro on it so I could get it on and off with the bark busters. Works great for the long slab rides and comes right off when you get in the trails.

(this isn't a pic of mine...just found it on the interweb to give you an idea)


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Old 05-29-2012, 11:17 AM   #65076
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Quote:
Originally Posted by Adv Grifter View Post
As I mentioned, I only spent an hour riding the TM40 equipped DR650.
I probably could have adapted but I just thought it was wrong ... and I knew riding it off road would wear on me over time/miles.

FIX?
Couldn't the return spring be swapped out for a lighter one? I've had two bikes with Keihin FCR carbs ... both light, easy throttles.

Also interesting to note that before F.I. came along ALL the Japanese motocross bikes ... and all KTM ... used the Keihin FCR carbs ... not the Mikuni TM40. In fact, I can't recall any OEM using the TM40 in years.

Wonder why?

You answered your own question in your post. All the motocross race bikes do come with the FCR. These bikes are high revving race bikes, the DR isn't. They also benefit from the additional adjustability because these bikes compete at tracks all around the country at different elevations and different soil/sand compositions. The FCR is a great carb no doubt just kind of overkill for the DR. You can use an atomic bomb to kill a fly...but you know a fly swatter will work just as well.

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Old 05-29-2012, 11:53 AM   #65077
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Tm40 throtle returning spring is adjustable, take closer look and you will notice it. There are at least three different positions.
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Old 05-29-2012, 12:04 PM   #65078
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I asked procycle about that, they said they ship with the lightest throttle pull already enabled.
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Old 05-29-2012, 01:21 PM   #65079
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Quote:
Originally Posted by Adv Grifter View Post
Couldn't the return spring be swapped out for a lighter one?
I would think so, but I'd really like to know for sure. Anyone know?
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Old 05-29-2012, 02:16 PM   #65080
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Can we get a few pics of your setup?
Thanks


Quote:
Originally Posted by Mongle View Post
Having broke my right wrist being dumb as a chump, all day rides give me wrist pain. I bought something like this. Mine has velcro on it so I could get it on and off with the bark busters. Works great for the long slab rides and comes right off when you get in the trails.

(this isn't a pic of mine...just found it on the interweb to give you an idea)


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Old 05-29-2012, 02:55 PM   #65081
NordieBoy
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Originally Posted by acesandeights View Post
Just wanted to say, 80% worn trail wings kick ass on single track that's been in the shade for the last six months with only a few weeks of melted snow on them. Yeah, completely wet, completely muddy, deep sink holes are no match for trailwings! Or, at the end of all this I mean to say, don't take the trailwings off paved roads...you've been warned!
They work well in snow though.
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Old 05-29-2012, 02:57 PM   #65082
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Originally Posted by kobukan View Post
I would think so, but I'd really like to know for sure. Anyone know?
When I ask about the different spring positions PC didnt know anything about them. Which I thought was odd.
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Old 05-29-2012, 02:58 PM   #65083
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Originally Posted by Adv Grifter View Post
In fact, I can't recall any OEM using the TM40 in years.
[/I]
Wonder why?
Harley?
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Old 05-29-2012, 03:53 PM   #65084
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The CrampBuster works well when hands on but I opted for http://www.amazon.com/2Wheel-Ride-GC...8331587&sr=8-1 which allows you to go hands off if you want. Enough friction to hold it open but easily overcome if you want to shut it down. Easily removeable and fits in your pocket.
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Old 05-29-2012, 05:01 PM   #65085
procycle
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Quote:
Originally Posted by DockingPilot View Post
When I ask about the different spring positions PC didnt know anything about them. Which I thought was odd.
Dunno who you talked to. We all know about it. As was mentioned earlier setting the spring to the lightest position is one of the many things we do to modify the TM40 for DR650 duty.
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