oil shooting uponto air box o8 brute 750i

my buddys 08 brute force 750i has oil shooting, spiting, or slinging on the top of the air box and all over him    it has only happened twice and we cant figure out if it is when he rides a wheelie or tops it out down the highway    the brute still runs fine afterward you just have to put some more oil in it   the oil gets all over who ever rides it at the time and all over the air box  and under the handle bars and runs down the side of the engine
  we cant figure oput where it comes from  and it doesnt leak the next time we ride just every now and then  has anyone else had this problem  any advice will be appreciated

07 honda rincon
589s spacers
3inch lift
hmf programmer
snorkeled
big red gears

09 polaris rzr
3 in lift
snorkeled
custom front and rear bumpers
custom doors

06 dodge 3500 dually 4x4
full replacements all around
305/70/17 mud brutes
straight exhaust
single cab
2.5 in leveling kit
rear wheel spacers

O god.  Tell him to chill on the wheelies and topping it out until he does the Catch-Can Mod. Do a search for "catch can"

does this mod work on the 650 SRA's?  working on a brute 650 now with the same problem.

2008 Yamaha Raptor 700R
Dynatek FI Controller,
GYTR Intake,
HMF Sport Full Exhaust,
PowerMadd Hand Guards,
BlingStar bumper,
UM Nerf Bars.
Pro-Tek air box lid
2002 Prairie 650
Snorkeled, Radiator Relocated,
Gorillas,
2" Lift,
HL Springs,
Pen Lock,
30" mudlites,
EPI yellow and red, 
DynaTek CDI
K&N,
Jetted,
1.5" wheel spacers, 
Big Gun Slip On.
2007 Polaris Outlaw 500 IRS (Wife's)
Razr's F/R
ProCom CDI
1988 Honda trx250r

FearTheBear


O god.  Tell him to chill on the wheelies and topping it out until he does the Catch-Can Mod. Do a search for "catch can"

its not coming from the crank vent, the crank vent line goes in to the air box. so if it was the crank  vent line you would be getting the oil in side the air box. so doing the Catch can wont work on the oil being blown on him.  i have the catch can done on mine and it works great. but to fix this you need to find the correct vent line.
 
mine does this same thing. its coming from your handle bar pod. a few of the vent lines are ran to this pod.  either like you said he was popping to many wheelies or he over field something. did he just service the bike.  so check all the vent lines in the pod and will find the problem. just look for the one that has oil INSIDE the vent.

If he has rerouted the crankcase vent then it's coming from there. A catch can will solve this problem.

BF750 BUILT FOR BUSINESS
Stock is for pansies
 
 

this happened to me, it was coming from the front diff, the vent line runs up under the pod, it only did it once to me and never again so i never did check in to it very much

    
05 700 prairie
26x10x12 front
26x12x12 back
Dynatek CDI
2 inch lift
UNI filter 

 
03 650 prairie 
27" mudlites 
dynatek CDi
2 inch lift
Lift springs
UNI Air Filter
1.5" spacers
custom center snorkels


1994 polaris 300 2x4
2 stroke 
 
    Kids
2007  70cc
   lifan (some china bike)

have to find out where it's coming from before you can know what to do to fix it..

Happend to me too. Easy fix. Quit 12'oclockn it! Refrain from doin wheelies!

Camo 07' Brute Force 750
2" Highlifter
S/S Tie Rods
Highlifter Lift Springs
3.0 Warn
UNI Airfilter
Red Secondary Spring
Dayco Extreme Belt 
2 Rhino Brand Axles
Aluminum Products A-Arm Guards
Aluminum Products Skid Plate 
Bazooka Speaker System
Chrome Type 7 ITP Wheels
29.5 x 12 Outlaws (Sold)
29.5 Swamplites
 

Wide open throttle will also cause this not just wheelies.