technical question about combustion chamber

Dave Chudak /

My question is,

Are these rough spots in the combustion chamber necessary(shown in the picture) ? i would think that they would negatively effect performance, but don't want to file them down, until i find out why it is like that in the first place.

is it rough for a reason? aggitate air inside chamber for a better mix maybe? i dunno... i just don't want to file them off, and find out that they are important..

thanks

1082667130_roughspots.jpg

Re: technical question about combustion chamber

John Joedicke /

Looks like it kind of hot in there or else the bike has been sitting a long long time and corrosion was working on the aluminium. Polish it.

positive?

Dave Chudak /

are you sure i should grind it off, and polish it..?? i don't want to wreck it. i am not sure how modifying the combustion chamber effects the dynamics of the engine..

it just looks like it was originally like that,... so i am wondering if i should take it off... i am not sure that it is corrosion... it was carbonized the worst there though, before i cleaned it...

Re: technical question about combustion chamber

Jason Luther /

i would leave them, if you polish them out , youd be adding more volume, therefor less compression. its not like your ports where airflow is being obstructed or anything.-jason

Re: technical question about combustion chamber

Christian Hanner /

looks like rough metal forging to me. Leave it.

Christian Hanner

Re: technical question about combustion chamber

You can at least polish everything else and the bumps if you want...but don't grind it down because you will loose compression a lot.

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