Blocked by ice

[rx1forever]

(ED—If you own a 2003 RX-1, print this out and save it for next winter. This is one story that got cut during our last publishing season but we felt it was important to get the word out, so here it is.)



Have you experienced ice blockage on the crankcase breather hose on your 2003 Yamaha RX-1?



You might have noticed a little oil leak from the cylinder head cover gasket. If you have, it might mean there is ice blocking the crankcase breather hose. If so, Yamaha has a solution. It might be best to have your dealer check this out before proceeding any farther, just to confirm what the real problem might be, if any at all.



Yamaha explained that in extreme cold weather conditions, the RX-1’s crankcase breather hose can become blocked by ice build-up, in the hose end, inside the air intake silencer. In extreme cold temperatures, normal moisture that occurs in the breather system can freeze and may eventually accumulate enough to completely block the breather hose at its outlet in the intake silencer.



When breather hose blockage occurs, crankcase pressure will build and can eventually cause the cylinder head cover gasket to leak or push out of place. It is also possible for other gaskets or seals to fail due to excess crankcase pressure.



If this situation does occur on your RX-1, Yamaha has advised its dealers to remove the top half of the air intake silencer and cut a 20mm slit in the breather hose. The slit will allow the crankcase pressure to be relieved if the hose end becomes blocked by ice.



It’s as simple as that.



For more information, contact your local dealer.

 

[Swiss Sledder]

Yeah, it happened to me last season in -35 weather. Oil shot out the crankcase because of ice in the breather hose. Dukester cut the slit in my hose for the fix. I will say it happened again two days later, even with the the slit in the hose. :?

 

[SIMMER]

Here is a post on that with pictures.....

http://www.rx1.info/viewtopic.php?t=181 ... light=slit

 

[Boss Hog]

We had the same problem on our Warriors after a week of ridding at below 0 F. with high humidity.

In all cases the oil blew out from the oil filter gasket. They were stock Yamaha filters hand tightened only. Dukester reported this in an earlier oil filter post. We feel that the leak at the filter prevented more serious problems.

Dukester eliminated the problem with a venturi principal type hose evac system mounted within the air box and pointed toward the carbs. Part of the air that entered the carbs when thru the outter portion of the hose end piece causing a suction on the evac hose by the carbs. We also feel we increased overal performanc of the seld during high speed runs during extrem cold conditions.

I would send a picture but all of the sleds have it removed for trade in.

I can't get more technical due to my very limited formal education. The majority of my education came thru life experiences. I only graduated from eight grade before working full time on the farm up to and including retirement. I am not making excuses for myself but just to add clariety to what I am trying to say.

 

[Snorover]

Boss Hog,

Don't degrade your self because of your limited formal education. Some of the smartest people I have known had limited education includeing my dad.

How come those educated engineers at Yamaha didn't think of that???

 

[SIMMER]

I can't get more technical due to my very limited formal education. The majority of my education came thru life experiences. I only graduated from eight grade before working full time on the farm up to and including retirement. I am not making excuses for myself but just to add clariety to what I am trying to say.

Hey Boss...some of the wisest people I have ever met were farmers!