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Old 05-22-2013, 02:02 PM   #76921
eakins
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Noticed the latest Motor Cyclist mag where Mark Cook wrote an editorial about his DR. Goes on to say how much he spent on it via ProCycle mods :-)
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Old 05-22-2013, 02:02 PM   #76922
motolab
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Quote:
Originally Posted by ER70S-2 View Post
The mixture screw flows fuel at all throttle openings and wastes some fuel doing so. Tim nails the explanation below.
While that's technically correct, the difference is greater the more the throttle is closed and therefore the higher the vacuum that is trying to suck fuel past the exposed area adjacent to the tip of the screw. At WOT a fuel screw adjustment may or may not be detectable at all as a change in CO%.

Regards,

Derek
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Old 05-22-2013, 02:05 PM   #76923
motolab
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Quote:
Originally Posted by Adv Grifter View Post
I found by leaning out my mixture screw (pilot fuel screw?), my overall MPG went up from about 46 MPG up close to 50 MPG. My idle is just a tiny bit lumpy but worth it for the improved MPG.
Part throttle should be tuned with the responsible circuits, not with the fuel screw.

Regards,

Derek
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Old 05-22-2013, 05:06 PM   #76924
Adv Grifter
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Quote:
Originally Posted by motolab View Post
Part throttle should be tuned with the responsible circuits, not with the fuel screw.

Regards,

Derek
I was not tuning it for part throttle. I was tuning it at Idle/shut throttle ... I was wasting fuel on the over run (like shutting off coming into corners).
Leaning out produced a significant increase in fuel economy.

As you stated above, on the over run with shut throttle, vacuum is increased, sucking fuel past fuel screw needle. YMMV.
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Old 05-22-2013, 05:11 PM   #76925
motolab
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Quote:
Originally Posted by Adv Grifter View Post
I was wasting fuel on the over run (like shutting off coming into corners).
Thanks for clarifying.

Regards,

Derek
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Old 05-22-2013, 06:27 PM   #76926
TUCKERS
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I did Colleen's DR Neutral safety mod today. YES...the Phillips screws were barely hand tight.

I replaced them with drilled stainless socket head Allens, blue Loctite AND safety wire. I would have just left it off but she likes the green light.

DON'T OVER LOOK YOUR NEUTRAL SAFETY GUYS, IT COULD BE A DISASTER.
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Old 05-22-2013, 07:04 PM   #76927
Burnt Toast
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Throttle sticking

So, over the last few rides my throttle started sticking a little, then a lot. Today it won't return on it's own. I took it apart and cleaned the bar which had some crud and rough spots on it. I used some fine sandpaper and sanded it until smooth. Put the throttle body on without cable and housing...smooth. Each of the cables moved pretty freely with good spring tension on throttle cable. I lubed the cables while I was there. Reassembled...dragging again. I took the housing off and held the cables with my hand and turned the throttle...smooth. I assembled the housing with the throttle body off of the bar...smooth.

It seems that the housing is putting the assembly in a slight bind. I can't find any spots that appear to be rubbing, but it acts like it is. No crashes or bump-ups. Bike has only been used on the street since I owned it.

Thoughts?
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Old 05-22-2013, 07:45 PM   #76928
joexr
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Quote:
Originally Posted by Burnt Toast View Post
So, over the last few rides my throttle started sticking a little, then a lot. Today it won't return on it's own. I took it apart and cleaned the bar which had some crud and rough spots on it. I used some fine sandpaper and sanded it until smooth. Put the throttle body on without cable and housing...smooth. Each of the cables moved pretty freely with good spring tension on throttle cable. I lubed the cables while I was there. Reassembled...dragging again. I took the housing off and held the cables with my hand and turned the throttle...smooth. I assembled the housing with the throttle body off of the bar...smooth.

It seems that the housing is putting the assembly in a slight bind. I can't find any spots that appear to be rubbing, but it acts like it is. No crashes or bump-ups. Bike has only been used on the street since I owned it.

Thoughts?
Cables too tight?
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Old 05-22-2013, 07:54 PM   #76929
ketur
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Quote:
Originally Posted by TUCKERS View Post
I did Colleen's DR Neutral safety mod today. YES...the Phillips screws were barely hand tight.

I replaced them with drilled stainless socket head Allens, blue Loctite AND safety wire. I would have just left it off but she likes the green light.

DON'T OVER LOOK YOUR NEUTRAL SAFETY GUYS, IT COULD BE A DISASTER.
I'm dreading this work, specifically removing the clutch basket and the complications that come from that. I'm probably going to end up trying to yank the thing out and be done with it... unless I can't get that upper screw anyhow.
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Old 05-22-2013, 07:55 PM   #76930
Mambo Dave
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Cables at bad angles.

Which I never mind since I ride a lot of street, and have bikes do that since 1993. If I want more throttle I turn it, and if I want less - I still turn it. If I want to take my hand off of the throttle and stretch that arm, or ride with no hands and stretch my torso ... I'm free to do so.

But I understand why any dirt bike or bike ridden off road should have a snappy return throttle.
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Old 05-22-2013, 08:42 PM   #76931
Carl Childers
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Quote:
Originally Posted by ketur View Post
I'm dreading this work, specifically removing the clutch basket and the complications that come from that. I'm probably going to end up trying to yank the thing out and be done with it... unless I can't get that upper screw anyhow.
With a little patience it can be done with the basket on. I switched my phillips head screws over to allen heads with no problem leaving the basket in place. I think if you do a search I think you'll find about 40% of us have done it that way.
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Old 05-22-2013, 08:42 PM   #76932
Chill
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Quote:
Originally Posted by RideAlongAtlas1 View Post
I've been using 91 octane. Do you reckon if I went higher it'll help? What is 'pinking'? Cheers
I'd avoid the 91 in Australia these days as most 91 octane brands seem to be E10.
Try a tank of 95, see if it's better. I had a look at some receipt I had of my first few fills. Starting with a full tank, I got 193km = 8.12L to fill it back up and 129 - 6.83L to fill it back up. Maybe the standard fuel tap (petcock) is going onto reserve at 8L instead of when you've only got 1L left.
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Old 05-22-2013, 08:45 PM   #76933
ER70S-2
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Quote:
Originally Posted by Burnt Toast View Post
So, over the last few rides my throttle started sticking a little, then a lot. Today it won't return on it's own. I took it apart and cleaned the bar which had some crud and rough spots on it. I used some fine sandpaper and sanded it until smooth. Put the throttle body on without cable and housing...smooth. Each of the cables moved pretty freely with good spring tension on throttle cable. I lubed the cables while I was there. Reassembled...dragging again. I took the housing off and held the cables with my hand and turned the throttle...smooth. I assembled the housing with the throttle body off of the bar...smooth.

It seems that the housing is putting the assembly in a slight bind. I can't find any spots that appear to be rubbing, but it acts like it is. No crashes or bump-ups. Bike has only been used on the street since I owned it.

Thoughts?
One of the best wheelies I ever walked was after spending the night next to a campfire after spending the day tipping over in a riverbed (bike died every time it saw water, at the most inopportune moments). Everything on the bike was full of sand. Once we got out, we rode through the Memorial Day camp sight. Guys walked up and said "Are you the guys that spent the night on the Muddy?" Yep, that was us. As I rode away on the single track, I popped a wheelie. Much to my surprise it was the 'perfect storm'. Hit the balance point, coasted, rolled the throttle on and off as needed. The sand filled throttle was under my complete control. Sure wish I could do that on the DR.

Quote:
Originally Posted by ketur View Post
I'm dreading this work, specifically removing the clutch basket and the complications that come from that. I'm probably going to end up trying to yank the thing out and be done with it... unless I can't get that upper screw anyhow.
Don't be afraid, we'll talk you through it. Just be patient and don't force anything. When I forgot to plug in my NSU after removing the shock, the bike wouldn't idle in neutral on the kickstand. That sucked. This is a life lesson and you want to learn it now. Patience: It might even save your marriage.

Quote:
Originally Posted by Burnt Toast View Post
Bike has only been used on the street since I owned it.

Thoughts?
What year, how many miles?
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ER70S-2 screwed with this post 05-22-2013 at 08:51 PM
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Old 05-22-2013, 08:49 PM   #76934
Chill
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Quote:
Originally Posted by motolab View Post
And we have another one.

To clarify, this is 95 RON rather than 95 (R+M)/2, right?

Regards,

Derek
Not sure what I'm another one of? I assume it is RON. I have only ever seen RON at the pump, I have not seen or heard of (R+M/2) before. In Australia many brands of 91 are now E10 (10% Ethanol) so are generally avoided. Some better info here http://www.bp.com/retail/liveassets/...nd_PowerV2.pdf
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Old 05-22-2013, 08:57 PM   #76935
GSF1200S
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Quote:
Originally Posted by ER70S-2 View Post
I don't know what your experience level is, I'm not trying to talk down to you or scare you.

I just did my CCT gasket last week, I don't even have the pipe back on yet. Some bits: If you decide to use RTV instead of fighting with gasket removal, you don't have to take anything off to remove the CCT. Is it easy, nope, but can be done. Why would you want to do that? The two bolts holding my exhaust manifold to the head were tight. If one breaks, you'll have to deal with getting the broken bolt out of the head. So I decided to WD-40 the bolts and let them sit overnight. I squirted the seam between the flange and the head, flushed it good so the WD could wick up the threads overnight. My point is, if your pipe hasn't been removed recently, hose it down tonight. Both bolts went off like gunshots when I removed them.

If you decide to remove and replace the gasket, the pipe and oil lines have to come off so you can get in to scrape. I used Permatex Gasket Remover but it was painfully slow. Although I don't like using power anything on an alum gasket surface; I used a 2" Roloc on an air grinder to get the worst of the gasket off, that gasket is stuck. You can re-use the washers on the banjo fittings, worse case is they'll seep a tiny bit of oil until you can get new washers.

Another potential problem: in the photo with the screwdriver stuck in the CCT, the handle is exactly where the pipe lives. You'll need a pretty short screwdriver in order to fit in the end of the CCT to release the plunger.

Good luck, let us know how it went.

In this photo with the pipe off you can see that the CCT will clear the starter and bracket that fastens the end of the clutch cable, if you choose to use RTV. (which may have to cure overnight ??)
Totally didnt take it as condescending or trying to scare me. I would consider myself "reasonably proficient" with the DR having taken most of it apart at one point or another, though most of my experience is with older cars. Biggest problem isnt that im not comfortable doing the job- its that I have a "on-the-road" toolkit and not my entire tool collection available.

I might try an RTV (ultra black oil resistant sound good?) solution and see if it holds. Mine is leaking pretty bad, and will certainly require a good bit of rag, qtip and carb cleaner cleaning at this point. Do I just try and goop the shit on as accurately as possible with the header in the way? I know what you mean about pulling header bolts as I had a bit of a nightmare with my Bandit replacing its header. I wonder how much a shop would charge to do this?
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