engine breather problem. FE650

gorne1611 · Aug 11, 2013

rosenberg 450 08 said:
I think it says in the book not to hold it flat out for long time in top gear.
I have a 08 450 and if i hold it flat out on the road racing a mate back to our cars on the road at the end of the day she will toss oil up into the carby, so when i wash it and fire it up she blows white smoke like as if she is rooted. but it's just oil sitting pooling before the carby. he has a 07 650 berg but does not have a problem at all with his and it has about 12000km up on it. his is higher geared and not reving as high as mine and this maybe why he does not have the problem.
If i fanged it real hard on the tracks from new it would blow smoke as well. so i would only put about 800 ml of oil in it and that helped a lot. but 800 ml is f all :cry:

Some oils may be more prone to climbing up past the gorge into the airbox as well i thinks.
I think it can be a combination of blowby and type of oil but this engine is not meant for holding flat out for long runs and she has only f all oil.
Maybe if the air filter is cloged more so, that may help suck more oil into the air box. :? i hate that as well so i just don't hold it flatout on the road any more. :angry:

i havent been holdinh it flat out for long straights the last weeks, so i dont have a problem anymore

but i think im still gonna do a rebuild but im proboably waiting untill the winter

P-son · Aug 12, 2013

good !!

read thit thread about crankcase venting

I think its the solution !

http://husaberg.org/forum/viewtopic.php?f=5&t=1110

SmaRTrxxv · Aug 13, 2013

I'm had the same problem with my FS650.. I blocked the rear breatherpipe and that helped a lot..

..and 650 has to be ridden like a pig - or else you should by a 450 :bounce3:

bigbore4eva · Apr 2, 2014

My 07 Fe650 was going this exact thing. I changed my air filter oil to a lighter oil to make it breathe easier. I notice that it does it still when the air filter gets too dirty. So, lighter oil, clean air filter more regularly. Because they such air so hard, if the filter is restricted it sucks air and oil from the head breather pipe.

bushmechanic · Apr 2, 2014

old thread about the blowby diagnosing maybe too late to help but you can put a hose on the remaining engine vent, sit on the bike hold the hose in left hand and rev the engine

if there is excessive blowby the hose will blow exhaust fumes and smoke out like a hair dryer

at idle there should be a barely discernible outward flow from a 3/4" tube .. about 20L a min

leakdown test is the proper way to do it

engine breather problem. FE650

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