Do you only have to change transmission oil in a 2 stroke dirt bike?

[Sportsman500Rider]

i want to buy a yamaha yz250 2 sroke dirt bike. i know you have to change the transmission oil once a year but do you have to change engine oil? or do you just fill up the engine oil?.

 

[quadboy55]

i want to buy a yamaha yz250 2 sroke dirt bike. i know you have to change the transmission oil once a year but do you have to change engine oil? or do you just fill up the engine oil?.

Once a year?? Thats only if you ride it once a year. For a bike like that every 10 hours of riding is the norm.

BTW, there is no oil in the crank of a 2-smoker. The oil you mix in the gas actually goes down into the crank and the down stroke from the piston creates pressure and forces the oil/gas mix through the case and into the cylinder through the intake port. The reeds act as a 1 way valve. When the piston goes up it sucks in more gas and oil into the crank case.

Thats also why 2strokes have such big pipes, they create back pressure to keep unburned gas out of the exhaust.

 

[xfirexp]

No engine oil to change in a 2 stroke, the oil is either pre mixed into gas or oil injected

 

[imdoo'n]

you should clean your power band monthly or when ever it starts to slow.

 

[gordhunt]

Dude change your tranny oil every few rides its cheap and easy

 

[sumx54]

you should clean your power band monthly or when ever it starts to slow.

Don't listen to this old grumpy fart...he has no idea

 

[quadboy55]

you should clean your power band monthly or when ever it starts to slow.

HAHA! That gave me a good laugh, I haven't heard that line in a while.

Or filling up your headlight fluid.

 

[youngpolarisguy]

you should clean your power band monthly or when ever it starts to slow.

New and improved way more power.

 

[tex78]

wow imdooin must have invented that.....

mabe thats y he has soooooooo much cash to burn:d

 

[tex78]

oh and yes change the oil often.... its cheap and easy...

don't use synthinetic oil either... just reg minerial oil....

syn oil's don't go with wet clutches much....

 

[imdoo'n]

wow imdooin must have invented that.....

mabe thats y he has soooooooo much cash to burn:d

no it is called workin.

 

[TheMuffinMan]

For the gear oil you want to run Redline superlight shockproof gear oil, it's the best stuff you can get. Keeps the clutch healthy, doesn't fling off the tranny gears, and takes three times as long to break down vs. regular gear oil so you change it less often. I know NAPA is a distributor for Redline products so if they don't have it in stock get them to order it for you.

 

[youngpolarisguy]

Back on topic i used to run gearsaver syn in the trans of my old bike never had any probs.

 

[tex78]

i ran 1/2 oil and 1/2 gear saver before but didn't notice a diff...

i just changed the oil every 2nd to 3rd ride... cheap insurance

 

[Waxy]

i ran 1/2 oil and 1/2 gear saver before but didn't notice a diff...

i just changed the oil every 2nd to 3rd ride... cheap insurance

Way overkill IMHO.

Unless you're abusing the clutch (slipping it a lot at higher RPM), you should be able to go a lot longer than that if you use a good quality synthetic bike transmission specific oil (OEM, Amsoil, Redline, etc..). Use some common sense and you'll be fine.

Regardless of what bike you buy, invest in a cheap hour meter to keep track of the ACTUAL running hours you're putting on the bike and base your maintenance schedule on that, not on the number of rides, tanks of gas, etc...

Waxy

 

[youngpolarisguy]

My old bike spent most its life in the skeg so the clutch got abused. good oil and change it often was my thoughts.