Hi All, new to forum and hope that someone can help with a problem I am experiencing with my recently aquired ST. The bike is running rich and is smokey and smells rich. the bike is low milage 35K miles and has been serviced by honda nearly every year since new!! It runs really well and fuel consumption is quite good despite this.Any ideas or suggestions would be much appreciated. Thanks
95 ST1100 running rich
- Thread starter davllan
- Start date
What makes a bike run rich?
1.Dirty air filter
2.Fuel enrichment circuit (choke) is not closing
3.Carb needle and seat leaking
4.Carb float levels too low
I'm betting #2., but start with #1.
Ralph Sims
1.Dirty air filter
2.Fuel enrichment circuit (choke) is not closing
3.Carb needle and seat leaking
4.Carb float levels too low
I'm betting #2., but start with #1.
Ralph Sims
Thanks Ralph, checked air filter-all ok, will investigate 2 to 4 in due course. Checked plugs today and middle electrode spot on but outer rim a little black. What's amazing is that its returning 55mpg and goes really well. You only really notice smoke in dark but a little in day but you can smell it when you pull up at a a junction. thanks again.
wjbertrand
Ventura Highway
If the PO fitted a K&N filter make sure the foam sock around the element has been removed. Another thought, a bad vacuum fuel valve diaphragm can leak fuel directly into the intake for cylinder #3. How does that plug look compared to the others?
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55mpg!!!!:bow1:
DON'T MESS WITH IT. I only get between 35-42 mpg and my plugs are perfect color and no residue in the exhaust pipes. Maybe my right wrist has something to do with it
Ralph Sims
Are you sure it's smoke? dusk and rain makes it sound more likge vapour.
55 MPG, ignore the smoke~!
I'd <3 55mpg!
My bike is running fine, and I'm averaging around 41mpg. Of course, I ride mostly highway at 70MPH average for my commuting duties.
More city/urban riding would probably result in better economy, but alas, I have to use a highway to get anywhere from home.
My bike is running fine, and I'm averaging around 41mpg. Of course, I ride mostly highway at 70MPH average for my commuting duties.
More city/urban riding would probably result in better economy, but alas, I have to use a highway to get anywhere from home.
I also record every fillup, so I have empirical data as to my fuel economy. I use MyMileMarker.com and upload data from my smartphone at the pump.
Hi, Davllan. Welcome to the forum. Is the gallon that you use a US gallon or an imperial gallon?
Avtrician
Ahhh. 1 imp Gallon = 4.55 Litres 25L= 5.499229 I Gallons
Unless you are using US litres :crackup
Unless you are using US litres :crackup
Ok, thanks for the questions on gallons etc. Having used the correct units etc I can now confidently say that I have averaged 48 imperial mpg on my last tankfull and about 50 of those miles were with the wife on the back and a top box. Not bad I guess. I am leaning towards the "leave it alone advice" at the moment.
Oh ha ha... Imperial gallons instead of US gallons... that's why you were getting such great numbers!
42 MPG US = 50.44 MPG UK
http://www.mpgtokpl.com/mpgustompguk.htm
http://www.mpgtokpl.com/mpgustompguk.htm
I have been getting just 41mpg consistently so If I could average 48 like you I'd be more than happy,though as a previous poster said my fondness for speed is probably a big issue.
I replaced the thermostat earlier this year as it was stuck open,but it didn't really make much difference,also checked the choke cable and it was working ok.