One reason could be an extremely worn engine, another possibility is way too much engine oil has been put into the crankcase.
what kind of oil goes in a 2005 honda 450r
I think 4l to 5l oil does Honda trx 450r holds.
You need to replace an oil seal on the gearbox.
15-40 W JASO MA or MA2.
You have overfilled itOr you have a leaking sealOr a crack in the housing.
The 2007 Honda TRX 450R has an oil capacity of approximately 1.8 quarts (or about 1.7 liters) when the oil filter is changed. If you are just changing the oil without replacing the filter, the capacity is around 1.5 quarts (or about 1.4 liters). Always refer to the owner's manual for the most accurate specifications and maintenance guidelines.
The oil filter is on the right side of then engine, behind a circular cover plate that has three bolts.
Check the exhaust for oil on it. A leak is most likely blowing onto the exhaust and burning off.
Certainly, a stripdown to check for wear and damage. Hopefully the crank and con-rod bearings will be OK and at most you will need is shells.
You have too much oil in your gas, that's why oil and gas is coming out your exhaust.
engine side look through the sight glass. tranny side... when the oil starts coming out of the check bolt its full
the oil dipstick is located between the exhaust manifold