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Author Topic: How much "gunk" should be coming out of my exhaust?  (Read 1367 times)

245luigi

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How much "gunk" should be coming out of my exhaust?
« on: November 18, 2013, 10:09:22 PM »
After about 400 km (248 mi) this is what my exhaust looks like:


Is this normal?? Im referring to the residue that has come out of it and deposited on the expansion chamber
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Currently:
2012 Kymco Like70
72cc Malossi BBK
Dell'Orto PHBG 19 AS Carb
52 Pilot Jet
92 Main Jet
W7 Needle, 40 Slide
2T atomizer + bushing
Tecnigas NextR Exhaust
TinyTach in Headset
2011 Kymco Like50 (stolen -> recovered)
PM's OK!

Vivo

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Re: How much "gunk" should be coming out of my exhaust?
« Reply #1 on: November 19, 2013, 01:42:06 AM »
Depends on several factors... combustion temperature, oil/fuel mix ratio, jetting, spark plug...
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245luigi

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  • Baltimore, MD, USA
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Re: How much "gunk" should be coming out of my exhaust?
« Reply #2 on: November 19, 2013, 03:24:02 PM »
Seem like something I should do more research in then. Anybody know of any resources?

FYI Im on stock br8hsa plug, stock oil mix (meaning I havent played with the pump settings at all), 88MJ and no idea as to my combustion temps
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Currently:
2012 Kymco Like70
72cc Malossi BBK
Dell'Orto PHBG 19 AS Carb
52 Pilot Jet
92 Main Jet
W7 Needle, 40 Slide
2T atomizer + bushing
Tecnigas NextR Exhaust
TinyTach in Headset
2011 Kymco Like50 (stolen -> recovered)
PM's OK!

Vivo

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  • Posts: 4981
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Re: How much "gunk" should be coming out of my exhaust?
« Reply #3 on: November 20, 2013, 01:48:28 AM »
Factory/stock fuel mix is ok... you need the lubrication... the idea is to burn all the oil in the combustion chamber so no oil goes out the pipe...
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