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Old 03-27-2011, 07:52 PM   #46501
basketcase
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Quote:
Originally Posted by Rumlover View Post
They do sell a repair kit that includes a new float needle and o-rings. I have heard that bad o-rings can hurt your mileage. An 08 seems a liitle new for carb problems, unless you have really racked up the miles. How is your fuel screw setting, air filter?
This bike has never yielded great fuel economy. It runs great and idles smooth but it just does not get above 40 mpg.

I notice they also sell a replacement float for the stock carb. How valuable is that to the fine-tuning picture?
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Old 03-27-2011, 07:53 PM   #46502
thinairflyer
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DR650 Anakee tires at the flea market

SOLD! Thanks ADV Grifter & ADV Rider!


I just put a less than 100 mile set of Anakees for sale at the flea market. DR650 sizes.

http://www.advrider.com/forums/showthread.php?t=672440

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Old 03-27-2011, 07:59 PM   #46503
Rumlover
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Quote:
Originally Posted by basketcase View Post
This bike has never yielded great fuel economy. It runs great and idles smooth but it just does not get above 40 mpg.

I notice they also sell a replacement float for the stock carb. How valuable is that to the fine-tuning picture?
I would think float level could cause issues. Seems odd that a stock untouched carb would have one out of wack, but anything is possible. I would doubt you need a new one, if anything just adjust the existing ones height. There is a good resource for this carb --- just google the BST bible (wrote by a KTM guy) if you don't have a manual.

edit: BST40 bible

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Old 03-27-2011, 08:00 PM   #46504
Paloma Paul
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switch

also check the kill switch right by the start button.......I've had that bugger get dirty/rusty and even in the run position the beast wouldn't start/run. If it has spark It has to be fuel.
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Old 03-27-2011, 08:24 PM   #46505
ER70S-2
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Quote:
Originally Posted by basketcase View Post
I'm tired of this 40 mpg business and think I'll tear the carb completely down ('08 DR650) and clean and rebuild it.

Can anyone tell me what parts to get, or if there is a kit, what kit to get?
There are two o-rings on the float assembly; 15 and 16 here:
http://www.bikebandit.com/2004-suzuk...5873#sch502315

Quote:
Originally Posted by zune View Post
the drain screw on the carb when loosened fuel will flow with the petcock in the prime position and the plugs are wet. I can't replace the plugs until tommorow.
Yes gas will flow until the float bowl is empty. So, put the petcock in run or reserve; fuel flow should STOP after the float bowl is empty. Let us know. Also, see my response above; about the two o-rings.

Quote:
Originally Posted by basketcase View Post
Thanks. I actually want to keep it stock -- i.e.. not cut the airbox. Does their kit allow that option?
No, it really doesn't. I live at 5800 ft and ride up from there. Stock jets, all I've done is remove the snorkel and cut a small hole in the top of the airbox (1.75 x 1.75 or there abouts). I always got above 160 miles before reserve, close to 60mpg: ride solo, 15t sprocket, don't abuse my DR, short shift, yada yada. This has lessened over the last year, I'm guessing my carb parts are wearing at 21,000 miles. Original chain is just about done, new one and sprockets on order.

So, what's your altitude??

The replacement stock float is $74.
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Quote:
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"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -

ER70S-2 screwed with this post 03-27-2011 at 08:34 PM
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Old 03-27-2011, 08:26 PM   #46506
sagedrifter
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Quote:
Originally Posted by zune View Post
Back from changing the gas and cleaning the carb.The spark looks week and plugs were black.Is it comman to have a bad coil or 2 fouled plugs at the same time.Thanks
Where did you set the float level at? Are you sure you have the complete float assembly in place. Are the O-Rings in good shape? Is the petcock leaking at all?

Do you know a good dealer that can fix it?

Where are you, maybe a fellow owner is close by??

The carb is simple after you know what to look for. One mans cleaning ain't another...

But, it sounds like its flooding, probably due to a leaking petcock flooding the engine overnight. I would guess the float level was messed up when you opened things up too, maybe not. I don't remember reading where you set the float. I do know when my engine is flooding I check the petcock and I check that the float is right and the float needle is sealing good. So, if the plugs are wet and you do have spark, petcock is dry with the engine off, check the choke operation... make sure its not stuck on flooding things, check the float level/needle and the floats o-rings next.

sagedrifter screwed with this post 03-27-2011 at 08:52 PM
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Old 03-27-2011, 09:07 PM   #46507
Xplorr
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Quote:
Originally Posted by Arc 21 View Post
Stock fork height (not lowered) is approx. 34" from the center of the axle to the top of the triple clamp.
Bike at rest on the forks, 34", check.

Quote:
Originally Posted by ER70S-2 View Post
my stock forks (full extension) are 35 1/4" from the fork cap to the axle centerline.
Bike on stand, forks unweighted, 35 1/4", check.

Quote:
Originally Posted by ER70S-2 View Post
Other than the rear suspension travel is about 1.5" less, no. Street riding, doesn't matter, quicker off-road speeds, it does.
Looks like I need to re-unlower the lowering for max travel.

Thanks guys, matt
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Old 03-27-2011, 09:12 PM   #46508
ER70S-2
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Quote:
Originally Posted by Xplorr View Post
Bike at rest on the forks, 34", check.



Bike on stand, forks unweighted, 35 1/4", check.



Looks like I need to re-unlower the lowering for max travel.

Thanks guys, matt
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Quote:
Originally Posted by Threewheelbonnie View Post
"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -
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Old 03-28-2011, 03:41 AM   #46509
basketcase
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Quote:
Originally Posted by ER70S-2 View Post
There are two o-rings on the float assembly; 15 and 16 here:
http://www.bikebandit.com/2004-suzuk...5873#sch502315

Yes gas will flow until the float bowl is empty. So, put the petcock in run or reserve; fuel flow should STOP after the float bowl is empty. Let us know. Also, see my response above; about the two o-rings.

No, it really doesn't. I live at 5800 ft and ride up from there. Stock jets, all I've done is remove the snorkel and cut a small hole in the top of the airbox (1.75 x 1.75 or there abouts). I always got above 160 miles before reserve, close to 60mpg: ride solo, 15t sprocket, don't abuse my DR, short shift, yada yada. This has lessened over the last year, I'm guessing my carb parts are wearing at 21,000 miles. Original chain is just about done, new one and sprockets on order.

So, what's your altitude??

The replacement stock float is $74.
Thanks, I'm going to start the reading and parts gathering to get this chore done myself.

The elevation where I live is right at 300 feet above sea level.

When I bought the bike from the original owner in January 2010 it had spent most of it's life sitting. I suspect the fuel had gelled and now I've taken it as far as I can take it with cleaner additives.

Last summer I rode the CDT and borrowed an IMS tank from a friend. The extra range was a godsend out there but riding locally it is not such an issue. That said, the extra range now would be the difference between staying in the national forest all day on one tankful, or having to come out at mid day to find a gas station.

So if I can get the mileage up to the 50 mpg range I can skip the IMS tank business.
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Old 03-28-2011, 04:39 AM   #46510
plugeye
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Quote:
Originally Posted by basketcase View Post
I'm tired of this 40 mpg business and think I'll tear the carb completely down ('08 DR650) and clean and rebuild it.
best of luck
i've been chasing this for 3 years & no good came of it.
since the speedo failed, its been fine... ignorance can be ok until it runs out of gas which sucks
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Old 03-28-2011, 04:53 AM   #46511
basketcase
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Quote:
Originally Posted by plugeye View Post
best of luck
i've been chasing this for 3 years & no good came of it.
since the speedo failed, its been fine... ignorance can be ok until it runs out of gas which sucks
Hmm. You are a more patient man than I.

I"m going to give the thing my best clean it up and tweak everything effort, but if it still does not improve the mpg I'll lay back in the weeds and buy a better mpg yielding stock carb from someone who installed a pumper. Hopefully it won't come to that.

Also, I need to note a correction. While on the CDT I pulled the airbox lid at around the 6,000 ft in elevation mark and ran it open until I got back down to around 3,000 to 2,500 ft. somewhere in the mid-west on the return trip.

As we dropped in elevation the air density increased and it was returning around 48 mpg when I put the air box lid back on. (My main complaint on the open air box is the "giant sucking sound" that obscures every other noise.)

But, my buddy who was with me consistently got 50-55 mpg on a stock bike, and he never had to pull his air-box lid to get what he needed.

So I have to think something is slightly out of whack on the air/fuel mix, or perhaps the float, and that if I can get it right I can get the better mpg without pulling the lid and enduring the noise.
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Old 03-28-2011, 08:31 AM   #46512
koorbloh
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in case anyone was wondering... fresh d606's give you instant skill, and jumping a big fat dual sport is fun.

*also, I need new springs front and rear

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Old 03-28-2011, 08:41 AM   #46513
zune
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starting issues no more

Thanks for the help ,picked up 2 new plugs and she fired right up .Took her for a ride and she works nice.I learned a little more about the bike and thanks for the help again..
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Old 03-28-2011, 09:12 AM   #46514
sagedrifter
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Quote:
Originally Posted by basketcase View Post
Thanks, I'm going to start the reading and parts gathering to get this chore done myself.

The elevation where I live is right at 300 feet above sea level.

When I bought the bike from the original owner in January 2010 it had spent most of it's life sitting. I suspect the fuel had gelled and now I've taken it as far as I can take it with cleaner additives.

Last summer I rode the CDT and borrowed an IMS tank from a friend. The extra range was a godsend out there but riding locally it is not such an issue. That said, the extra range now would be the difference between staying in the national forest all day on one tankful, or having to come out at mid day to find a gas station.

So if I can get the mileage up to the 50 mpg range I can skip the IMS tank business.
The fuel additives may have killed the o-rings and the needle valve..... At stock settings with a 260 pound rider I got over 50 mpg easily. It may just be a float level issue.

Its an easy job. Remove the carb, remove the fuel bowl screws which when stock are very tight. Remove the float pin, pull it straight up, replace the o-rings, check the needle valve for issues, remove the main jet, pilot jet, pilot screw, spray carb cleaner in all holes and passages, put it all back, set the float level, put the bowl back on.

I would have the o-rings, new allen head screws, an extended pilot screw and a new pilot jet on hand before cleaning the carb. The main jet is usually fine with some light green crap on it. Wipe it off, do not damage the jets by putting needles or something else hard in them.

At sea level, my bike liked 2 1/2 turns out on the pilot air screw. You will need to have a drill bit for the pilot air screw plug if its not been removed. I would have an easy out kit ready in case the pilot jet is stuck in tight, a manual impact driver or some thing to break the fuel bowl screws loose if original. With a manual impact you probably wont damage the screws but, I would replace them anyway. I like to locktite my bowl screws, I've had them loosen up when riding in the past. You will need a vernier caliber to measure the float level or some thing that can measure the float level which is .58"...

Procycle has the BST Repair Kit, comes with all the o-rings and the screws, fuel needle, bowl seal, extended pilot screw: http://www.procycle.us/bikepages/dr650.html#fuelsystems

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Old 03-28-2011, 09:34 AM   #46515
Junglerot
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FCR adapter

I got a fcr 39 carb for my DR, and I'm looking for the Sudco adapter. I found Sudco's catalog with the adapters, but I'm not sure which one to order. Does anyone know which adapter I need to get?

Catalog page here
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