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Old 04-26-2013, 06:56 AM   #166
hardwaregrrl
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Quote:
Originally Posted by blaine.hale View Post
I figured as much. I found out that I'm running a 35 pilot...which some of you r100 folks are running. I'm seeing the trend that the r75 folks and r80 folks are running a 30. Luckily, Jenna loaned me some jets and there's a 30 pilot in there to try out <3
There should be a 25 in there....or a 27.5. Try going small on the pilot till you can get it to idle, then tune the main. 35 is wayyyyy big.
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Old 04-26-2013, 07:04 AM   #167
Kai Ju
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Blaine, you're right about the bigger jets for the R100s. I initially tried running a 27.5 on my R100 and I had to keep the airscrew seated for it to run at all.
I'm now running 35s which work great, so you're welcome to the 27.5s if you want to try them.
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Old 04-27-2013, 09:28 AM   #168
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Blaine, you're right about the bigger jets for the R100s. I initially tried running a 27.5 on my R100 and I had to keep the airscrew seated for it to run at all.
I'm now running 35s which work great, so you're welcome to the 27.5s if you want to try them.
I just put some 30s in there and they seem to not make much difference. Backed down to 2 1/2 turn on the mixture screw and still bellowing black smoke from the left side. Popped in new spark plugs to make sure the test was accurate.
Looks like it does idle sliiightly better, still has a tendency to die.

Quick video. Whoops...recorded it hotdog style and not hamburger style.
http://www.youtube.com/watch?v=cPdON...P3p7JAuruambTw
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Old 04-27-2013, 05:45 PM   #169
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Double check your enrichner plunger, mine was hanging up and giving me false readings. A shot of silicon spray on each brass body fixed that.
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Old 04-27-2013, 07:53 PM   #170
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Originally Posted by oldroadie View Post
Double check your enrichner plunger, mine was hanging up and giving me false readings. A shot of silicon spray on each brass body fixed that.
+1 Since you're belching black smoke form one side only you need to find out why, oldroadie's suggestion would be the first step.
Once you solve that problem you might be surprised about how close your pilot jets are.
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Old 04-28-2013, 09:55 AM   #171
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You guys talking about the brass choke plunger?
I'm not sure how it's even possible to get that stuck. It's attached to the paddles that I have to flip up and down. There's no tolerance for them to be off.
The next pilot I have to drop down to is a 20...that may be a bit too far lean.
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Old 04-29-2013, 04:34 AM   #172
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They are spring loaded and the barrel can jam in the bore even though the lever is up.
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Old 04-29-2013, 07:20 AM   #173
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Originally Posted by oldroadie View Post
They are spring loaded and the barrel can jam in the bore even though the lever is up.
+1 again, the lever only pulls it up, once you release the lever the spring seats it. When ambient tempt is above 60 F all I have to do is barely crack the choke on my 38s to start the bike. That's using the stock choke lever on the airbox. I can move the lever to where I just feel resistance and then go a touch more.
It's worth investigating. Also make sure that your mainjet, as well as the pilot jet, is tight in the carb.
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Old 04-29-2013, 07:26 AM   #174
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Have you checked to insure the needle is properly "trapped" by the plate on top of the slide? I've had that happen before, too.
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Old 04-29-2013, 07:48 AM   #175
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Originally Posted by oldroadie View Post
Have you checked to insure the needle is properly "trapped" by the plate on top of the slide? I've had that happen before, too.
Definitely. I've have to pull that apart so many times to make sure cable slack is perfect and everything is seating.
So just to make sure...which direction should the paddle be to enrichen the circuit (IE Choke ON)? The very end pointing to the ground and the brass plunger up, or the opposite?
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Old 04-29-2013, 08:20 AM   #176
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Quote:
Originally Posted by blaine.hale View Post
Definitely. I've have to pull that apart so many times to make sure cable slack is perfect and everything is seating.
So just to make sure...which direction should the paddle be to enrichen the circuit (IE Choke ON)? The very end pointing to the ground and the brass plunger up, or the opposite?
The plunger needs to be down, the lever end up. Push the lever down to 'choke', pull up to shut it off. .
But like oldroadie said, you have to make sure that the plunger goes all the way down.
Have you had the plunger out and does it have the spring between the screw top and the piston ?
Does the piston have the rubber insert that seals it to the body ?
The fact that only one side belches indicates a problem with that carb, easy thing to do would be to switch them left to right and see if the problem moves with the carb.
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Old 04-29-2013, 11:01 AM   #177
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One other thing might be the air jet for the enrichner, it's in the mouth of the carb, could it be blocked or clogged?
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Old 05-01-2013, 05:55 AM   #178
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I'm actually thinking I might have an incredibly dirty air filter at this point because both sides spit black smoke now.
When I go for a ride around the block (off choke) and park...if I flip the choke on while running for either side, it kills instantly. My assumption there would be that I'm adding even more fuel into an already air lacking circuit. I'll order a couple new air filters...r75 probably needs one as well.
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Old 05-01-2013, 10:29 AM   #179
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In all the years I've been wrenching I have yet to see an airfilter on a streetbike dirty enough to make a difference.
As a matter of fact I did a before and after dyno run on a CB1000 with a 50,000 mile airfilter and a new one. That engine couldn't have cared less.
The exception would be a filter that is completely oil soaked from blow by, or one that is clogged with dirt, as in from riding in the dirt.
I'm not going to read the whole thread so I'll ask: how is the float level ? That's certainly something that could screw you up as well.

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Old 05-03-2013, 10:57 AM   #180
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I want to try bigger mikunis

VM34 or vm38's?

I thought I had a jetting issue but I think that the anemic top end power is due to the air volume not being enough.

Thoughts?

Stock 1986 r80 btw.

Pretty good around town and at speed limits with the 32's.
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