Just cleaned my heads this weekend and I noticed that the front cylinder head had a lot more build up than the rear one. Is that unusual in other's experience? Does it indicate anything about suboptimal engine operation?

 

Guessing it's winter there?

 

All else equal, the front cylinder runs cooler than the rear. Maybe the difference is significant that the front cylinder can't burn out the carbon as well as the rear... Just my guess.

 

Year, model and mileage please.

Let me get this straight. You R/R the heads from time to time to clean them??:icon-shrug: Do you also clean the tops of the pistons? Not being a smart *** but that can be done without removing the heads with some Seafoam.

Having said that, if the heads are off, post a picture of the tops of the pistons; more important. If there is excessive carbon buildup, valve guide seals could be leaking and/or some oil getting by the rings. When the heads are re-installed, run compression and leak down tests and post the results. Als consider venting the head breathers to the atmosphere.

 

Marvel Mystery Oil.

Put a shot in your gas tank at fill up time.

 

Certainly will help but won't get rid of heavy carbon build up like Seafoam.:iconP_wink:

 

Seafoam in the tank or doing the through the throttle body thing?

 

Seafoam will help clean the carbon as the bike runs,that said if you have the heads apart it's a good time to freshen heads with a touch up on the seats/valves & new seals (have the guides checked to).not a bad idea to TQ plate the cylinders & check them for out of round too

 

Try looking into oil catch cans....

https://www.roadandtrack.com/car-cul...tch-can-works/

 

In the tank, like MMO will help keep carbon from building up but if you want to blow it off the piston tops, etc.; throttle body thing. Plenty of "how to" information on the interweb.