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Carbon Build-up

  • Thread starter Thread starter Poot
  • Start date Start date
P

Poot

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Hi all,

just a question for my brother (85 Maxim 750).

Is it normal to see 1mm+ of the thick , black (and some white stuff too) carbon buildup inside the engine?

bike has 70000km on it. any solutions to this problem? and what are the problems with these kind of symptoms?


poot
 
Inside the engine where? At the exhaust manifold? That is normal, and 1mm doesn't suprise me.
 
I second that, that is pretty normal, sounds like it has been running a veriety of condition, the lighter color buildup is normal/lean mixure, the black is rich mixture, I like to run a little black, perfect is cardboard brown. You will get much more buildup while running rich, running lean is burning everything, so it will burn very clean, yet hot.-darren
 
How would you go about clean this shtuff off??

my brother keeps telling me how disgusting it is.
 
Well you can do what I did, I just took a mini wire wheel on a dremel and cleaned her up, or I'm not sure how well they work but supposedly SeaFoam works for carbon build up.-darren
 
How would you go about clean this shtuff off??
Click to expand...

I wouldn't bother unless the head is off already. In that case, it's easy to deal with with a wire brush and some kerosene.
 
Are you sure that he is referring to the combustion area of the engine? If he is refering to the area of the crankcase and under the valve cover, that is a different matter. That would indicate dirty oil or use of non detergent oil(highly unlikely) over an extended time period. I also bet that heavy clutch abuse could contribute to lots of gunk in the oil but again good maintanance would take care of this by way of the filter and detergents.
 
it would be in the combustion chamber. Maybe its time for him to rebuild :lol:
 
it would be in the combustion chamber. Maybe its time for him to rebuild
Click to expand...

I doubt it. The only downside to the carbon buildup is that it retains heat, but I'd be willing to bet that the fins on the outside of the block are dirty too. Your engine can run 10 degrees cooler if you make sure every nook and cranny is dirt, grease and oil free.
 
Also carbon buildup will give you more bottom end torque... lol, aka carbon build up in the combustion chamber will add your compression ratio = more bottom end power.-darren 8)
 
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