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Old 10-09-2013, 06:48 AM   #226
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Quote:
Originally Posted by Uncle Pollo View Post
Your plug is out of focus.
Does that mean it's too lean or rich? Or perhaps I need to move to the 1.5's?
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'85 R80RT G/Sified <|> '91 R100GS Bumblebee (103K miles and climbing) <|> '73 R75/5 LWB
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Old 10-09-2013, 07:51 AM   #227
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Quote:
Originally Posted by Beater View Post
Does that mean it's too lean or rich? Or perhaps I need to move to the 1.5's?
Out of camera focus silly They look like toasted marshmallow to me. Good
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Old 10-09-2013, 09:07 AM   #228
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Originally Posted by hardwaregrrl View Post
Out of camera focus silly They look like toasted marshmallow to me. Good
PS - "1.5's" are a reading glasses size

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Old 10-09-2013, 09:19 AM   #229
blaine.hale
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I always thought the beemers were supposed to run a little lean and the plug should be more white than brown...like a lightly toasted marshmallow. As long as I don't smell fuel and it doesn't pop on deceleration, I'm usually happy.
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Old 10-09-2013, 10:09 AM   #230
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PS - "1.5's" are a reading glasses size
D'oh!! I read that as 150 main jet. Maybe I need some fucking glasses
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Old 10-09-2013, 10:11 AM   #231
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Quote:
Originally Posted by blaine.hale View Post
I always thought the beemers were supposed to run a little lean and the plug should be more white than brown...like a lightly toasted marshmallow. As long as I don't smell fuel and it doesn't pop on deceleration, I'm usually happy.
I can always lower the needle one stop and see what happens. Right now the main is a 200.

Quote:
Originally Posted by hardwaregrrl View Post
D'oh!! I read that as 150 main jet. Maybe I need some fucking glasses
I resisted for a couple years ... now, I have 1.0's and I can't live without them. However, I look like I'm 80. Boooo.

EDIT: Here's a better picture of the plug ...

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Beater screwed with this post 10-09-2013 at 10:24 AM Reason: Add pic
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Old 10-09-2013, 10:24 AM   #232
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D'oh!! I read that as 150 main jet. Maybe I need some fucking glasses

You need glasses? Hell I can do it with my eyes closed.
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Old 10-09-2013, 10:32 AM   #233
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looks fine

how does it ride?
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Old 10-09-2013, 10:42 AM   #234
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Originally Posted by Uncle Pollo View Post
looks fine

how does it ride?
Like a tractor. Smoother than the Bings all the way through till 75-80mph (which is kinda my limit). Huge pull off the line (better than Bings). I can accelerate quickly without having to guage throttle response (due to the Bings propensity for flooding the engine). I'm getting better mpg. All the way around I like it.

VM32 on a '91 R00GS
Main is a 200
Pilot is a 35
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Old 10-09-2013, 11:30 AM   #235
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Originally Posted by Beater View Post
Like a tractor. Smoother than the Bings all the way through till 75-80mph (which is kinda my limit). Huge pull off the line (better than Bings). I can accelerate quickly without having to guage throttle response (due to the Bings propensity for flooding the engine). I'm getting better mpg. All the way around I like it.

VM32 on a '91 R00GS
Main is a 200
Pilot is a 35
Small valve dual plugged heads


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Old 10-09-2013, 11:32 AM   #236
supershaft
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Reading plugs depends completely on how many miles are on the plug. Most all real plug readers read brand new plugs. Used plugs are always going to be more colored.

The plug in that photo is reading quite a bit rich.

IMO 34 Mikuni's are too small for any airhead above 750cc. Better low rpm performance with 34's versus 32 OR 40mm Bings? 38mm mikuni's will give a lot better low rpm performance than 32mm Bings AND get you a lot more top end performance than 32 and 34mm Mikuni's AND 40mm Bings all at the same time!

Bings do not have any propensity to flood our engines. Messed up Bings do but so do messed up Mikuni's!
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Old 10-10-2013, 06:03 AM   #237
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Originally Posted by supershaft View Post
Reading plugs depends completely on how many miles are on the plug. Most all real plug readers read brand new plugs. Used plugs are always going to be more colored.

The plug in that photo is reading quite a bit rich.
I'm starting to agree with you on this ... I don't know if my nose was clogged earlier or what ... but I'm starting to smell gas when I stop ... So ... drop the needle or immediately try the 190's?

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Originally Posted by supershaft View Post
Bings do not have any propensity to flood our engines. Messed up Bings do but so do messed up Mikuni's!
Absolutely. And I will completely admit that those 40mm Bings had not been 'worked on' for at least 20K miles. It was one of those situations that the bike was running sooo well that I didn't want to 'change anything'. Either way, I blew a diaphram and had the Mikunis on the shelf. But, point taken,
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Old 10-10-2013, 08:13 AM   #238
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IMO, mains are the easy part. Get it running right off idle and into the midrange and then put smaller mains in it until it won't run and go back up a 'size' or two. Done. Any richer than that is costing you hp although it will run a little to way too rich just fine (other than costing you hp, carbon build up, and poor mileage). A little leaner and it won't run at all above 5k or so in top gear if it isn't worse than that. My current setup is a lot worse than that.

Smell gas? Float level? Fuel line?
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Old 10-10-2013, 08:50 AM   #239
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Originally Posted by supershaft View Post
IMO, mains are the easy part. Get it running right off idle and into the midrange and then put smaller mains in it until it won't run and go back up a 'size' or two. Done. Any richer than that is costing you hp although it will run a little to way too rich just fine (other than costing you hp, carbon build up, and poor mileage). A little leaner and it won't run at all above 5k or so in top gear if it isn't worse than that. My current setup is a lot worse than that.

Smell gas? Float level? Fuel line?
The float levels seem fine. It's running as it should and there isn't any fuel coming out the overflows. My leather shoes don't smell of gas. It does have a bit of a habit of the engine not returning to idle quickly ... which makes me think it is incredibly rich. However, it is running 'right'. Idles nicely around 1100-1200. I have great pickup and no bogging down.

So ... looks like we'll experiment with smaller mains. Once I figure out that then we can really dial it in with the needle.

Thanks!
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Old 10-10-2013, 09:43 AM   #240
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Usually hanging idle is a either/or both the idle speed and mixture screw and it usually is from being too fast and/or LEAN. Just a tad on the mix screw can make a big diff if you are in its 'zone'.

Don't confuse the jet needles and the mains. The mains will effect your bike big time well before the books say they do. It's still the mains.

Try not to forget that you can be too rich one place and too lean another. Usually but not always I find people trying to run too lean just off idle (mostly slide angle and needle jet) and too rich on the jet needle and especially the mains. Rich mains just kill hp! The worst part is that they can run and sound surprisingly good doing it! Don't forget that richer slides and leaner needle jets can somehow run a lot better than richer needle jets and leaner slides and vise versa. It's all about the combo's down there and all about the mains up on top and really way before that.

supershaft screwed with this post 10-10-2013 at 09:55 AM
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