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TW200 Technical help

Started by tw4jv at 07-15-2008 11:16 PM. Topic has 10 replies.

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   07-15-2008, 11:16 PM
tw4jv is not online. Last active: 8/28/2008 4:47:56 AM tw4jv

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Joined on 05-01-2008
SF Bay Area
Posts 45
How to tell the difference between a lean and rich condition?
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I am trying to get the best tune out of my bike and in doing so I am having a few troubles. Just so its clear in my head what is the difference in symptoms between a lean and rich condition?
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   07-16-2008, 12:27 AM
uktw125 is not online. Last active: 7/14/2010 1:49:32 AM uktw125



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Joined on 06-05-2008
Devon, England.
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Re: How to tell the difference between a lean and rich condition?
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The first thing to do is look at the colour of the spark plug after a good run, black is rich and VERY light tan or whitish is lean. A lean engine will run much hotter also. These are very basic methods to get you some where near the correct mixture.
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   07-16-2008, 7:06 AM
Rman of 237 is not online. Last active: 5/17/2010 8:35:56 PM Rman of 237



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Joined on 05-04-2007
Northern Fayette Co. TX.
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Re: How to tell the difference between a lean and rich condition?
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 uktw125 wrote:
The first thing to do is look at the colour of the spark plug after a good run, black is rich and VERY light tan or whitish is lean. A lean engine will run much hotter also. These are very basic methods to get you some where near the correct mixture.
+1 on everything uktw said! Remember though if you start uncorking your bike it will cause it to run extremely lean so rejetting is a must. Watch your plug!Yes [Y]

'06 TW200 FMF uncorked
'06 XR650L Sumo
'98 XR440R trick and plated
'94 KDX200
'84 RZ350
'83 XR350R
'84 ATC125

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   07-16-2008, 11:00 PM
koolhandlinc is not online. Last active: 7/17/2008 1:05:03 PM koolhandlinc

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Re: How to tell the difference between a lean and rich condition?
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U can also look at exhaust. Look inside or run ur fingr around inside. (with engine off of course. If its all black its been running way 2 rich.

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   10-17-2008, 8:25 PM
T-Duble D's is not online. Last active: 5/17/2009 4:16:58 PM T-Duble D's



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Joined on 08-30-2008
Northern Kentucky
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Tongue Tied [:S] Re: How to tell the difference between a lean and rich condition?
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So what color do you want the plug to be? Are we talking about the color on the porcelain?
"You will learn more by traveling a road than you will by
consulting all the maps in the world".

RT 100 (sold)
'95 TW 200 (sold)
'07 TW 200
D2 moto pegs, Jimbo's Cafe fairing, 42 T rear, Tusk risers
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   10-18-2008, 1:13 AM
uktw125 is not online. Last active: 7/14/2010 1:49:32 AM uktw125



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Joined on 06-05-2008
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Re: How to tell the difference between a lean and rich condition?
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You should look for a pale brown colour on the electrodes not the porcelain. Take the plug out so you can see the bit that would be inside the cylinder head.
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   10-18-2008, 8:36 AM
T-Duble D's is not online. Last active: 5/17/2009 4:16:58 PM T-Duble D's



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Joined on 08-30-2008
Northern Kentucky
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Re: How to tell the difference between a lean and rich condition?
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I pulled my plug and it has a light violet color to it! I am not color blind and I checked it in the sunlight as well as inside just to be sure. What does this mean?
"You will learn more by traveling a road than you will by
consulting all the maps in the world".

RT 100 (sold)
'95 TW 200 (sold)
'07 TW 200
D2 moto pegs, Jimbo's Cafe fairing, 42 T rear, Tusk risers
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   10-18-2008, 10:56 AM
uktw125 is not online. Last active: 7/14/2010 1:49:32 AM uktw125



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Joined on 06-05-2008
Devon, England.
Posts 143
Re: How to tell the difference between a lean and rich condition?
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I have never seen a plug that looks violet in colour only from black to brown then white in extreme cases. Is it a special plug or standard brand and grade?

Hopefully Ben Parry can help with this one. He has alot more experience with setting up and tuning engines than me.

Sorry I can't help anymore.


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   10-18-2008, 5:43 PM
srs713 is not online. Last active: 7/11/2010 6:04:27 AM srs713



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Joined on 09-14-2008
Wichita, KS
Posts 440
Re: How to tell the difference between a lean and rich condition?
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Found these two pages from Google.
http://www.classic-car-magazine.co.uk/articles/spark_plug_colour_guide_chart.aspx
http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.aspx

Every Clymer or Haynes manual I've owned had a plug chart in it.

Stephen S.
'07 TW200:
15/50 sprockets, O-ring chain, D2Moto foot pegs
tweaked carb (127.5 jet, 0.019 needle shim, idle screw @2.25),
Rubbermaid "Action Packer" on homemade brackets

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   10-21-2008, 5:16 PM
T-Duble D's is not online. Last active: 5/17/2009 4:16:58 PM T-Duble D's



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Joined on 08-30-2008
Northern Kentucky
Posts 275
Tongue Tied [:S] Re: How to tell the difference between a lean and rich condition?
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It's the original plug the bike came with new off the showroom floor. It's pretty much a violet tint, not so much as colored. Whatcha think?
"You will learn more by traveling a road than you will by
consulting all the maps in the world".

RT 100 (sold)
'95 TW 200 (sold)
'07 TW 200
D2 moto pegs, Jimbo's Cafe fairing, 42 T rear, Tusk risers
   Report 
   10-21-2008, 5:21 PM
T-Duble D's is not online. Last active: 5/17/2009 4:16:58 PM T-Duble D's



Top 75 Posts
Joined on 08-30-2008
Northern Kentucky
Posts 275
Re: How to tell the difference between a lean and rich condition?
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Here's a good one, still can't find any violet colored plugs though

http://www.theultralightplace.com/sparkplugs.htm
"You will learn more by traveling a road than you will by
consulting all the maps in the world".

RT 100 (sold)
'95 TW 200 (sold)
'07 TW 200
D2 moto pegs, Jimbo's Cafe fairing, 42 T rear, Tusk risers
   Report 
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