Freestyle Pistonwash? What ya think?

Christian_83

Xscream
Location
Denmark
Ive recently switched from 44cc to 42cc domes in my SS 850 DASA, and took 2 photos of the pistons.
What are peoples opinion about the piston wash reading? Engine has only 20hours on it. I thinking a little fat maybe?
 

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Christian_83

Xscream
Location
Denmark
Sounds good. Yes blue its on the gas instantly and pulls hard. So i think i will let be that way. Only down side is, its freaking hungry :)
 

Philip Clemmons

Owner, P&P Performance
Location
Richmond, Va
Zzylstra nailed it. The amount of air and fuel don't change. You are simply squeezing them tighter, creating a more violent (reactive) explosion, resulting in more downward force on the piston. Jetting typically won't need to be changed. Timing, plug heat range, and octane, however, may need adjusting.
 
Last edited:
Location
dfw
These pictures makes me think I did something wrong. My piston tops always looked brand new.

I had a new set of Wisecos that stayed shiny for three rides with the jetting fairly clean at part throttle and a few RPM rich of peak at full throttle. After a 5 min full throttle run across the lake the centers turned brown. So what did piston wash tell me? Not a damn thing, I tuned the carbs perfectly on the first ride.
 

Poizen

Mical
Site Supporter
Location
South Africa
Any kind of water getting into the motor can steam clean the pistons. Common with head gasket or exhaust leaks.

yip any water will make it look brand new

on my race car i inject a mixture of water meth to up the octane and cool the boost charge

took my motor apart and it looked newer than when i put it togther no carbon build up at all
 
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