How often do you???

[yamaha250f]

Change out your piston for a new one. Ive had my yamaha yz250f for 7 years now and i havent ever had to get a new one and I ride it like mad. I had the whole engine pulled apart so I could fix a trans problem. The trans problem was the only thing that I really ever had major to do to it. I took it to North American Warhorse to get a bearing pulled out so i ask him how my piston look and he said its in great shape still. I was mad surprised its been 7 years and alot of abuse. I guess it just goes to show do your normal maintaining and it will last a while.

250fs havnt been out for 7 years yet :rolleyes:

[CRich[814]]

Originally posted by Honda86
250fs havnt been out for 7 years yet :rolleyes:

yamaha's have genius. 2001 was the first year.

[yamaha250f]

yea buddy i have a 2001 Yamaha YZ250F

i didnt realize the yamaha 250f has been out that long. I thought they came out in 03-04...guess i was wrong. Chill out people.

[mx428]

My dad does my 250f top end every 6 weeks or so. But I also put a good 25 hours a week on my bike. I change my tranny oil every 3 rides my motor every 10 hours.

[2004exrider]

Originally posted by mx428
My dad does my 250f top end every 6 races. But I also put a good 25 hours a week on my bike. I change my tranny oil every 3 rides my motor every 10 hours.

Is that necessary or just a precaution kind of thing just to make sure its running its best? Just curious.

Jimmy

[mx428]

Originally posted by 2004exrider
Is that necessary or just a precaution kind of thing just to make sure its running its best? Just curious.

Jimmy The oil is necessary, riding it hard and as often as I do you really need to keep that oil fresh. But the pistons are to keep it fresh and running strong, and less likely to blow up which = big dollars. I also check my valves to make sure they're ok or if i need to shim them every 5 rides or so too because that's also very important and can cause big problems.

[yamaha250f]

I have never had one problems with my valves and i never checked them also I usually change my oil when its dirty i run amsoil and again never have had a problem and like i first said I have 7 years on my piston riding tracks and trails from the first sign of open ground with ice and snow still hangin around until the snow is just about to fall.

[81 clark racing]

wait you have never checked/ adjusted your valves in 7 years?

[mine]

Originally posted by mx428
My dad does my 250f top end every 6 weeks or so. But I also put a good 25 hours a week on my bike. I change my tranny oil every 3 rides my motor every 10 hours.

chit doggy thats like 3.333333 hours every time you ride. I timed myself, I went form 8am to 4pm and i only rode for a total of 2.5 hours. It must be that 4poke, :eek2:

[mine]

Originally posted by 81 clark racing
wait you have never checked/ adjusted your valves in 7 years?

:eek2: :eek2: :eek2: :eek2: :eek2:





























































:rolleyes:

[mx428]

Originally posted by mine
chit doggy thats like 3.333333 hours every time you ride. I timed myself, I went form 8am to 4pm and i only rode for a total of 2.5 hours. It must be that 4poke, :eek2: i ride 30-45 min motos, usually about 4 or 5 hours total a day. I go by my hour meter for oil changes and whatnot.

[mine]

good god, ill have to get in shape. I do like 4 lap motos. haha

[mx428]

Originally posted by mine
good god, ill have to get in shape. I do like 4 lap motos. haha my lap times where i ride everyday are anywhere from 1:46-1:53 on average on a 250f/450 i usually try to do about 25 laps each moto.

[yamaha250f]

Yeah I never have checked my valves in 7 years this is the first time I have ever checked them since i had my motor apart already for my trans problem and all 5 were still in specs

[mx428]

Originally posted by yamaha250f
Yeah I never have checked my valves in 7 years this is the first time I have ever checked them since i had my motor apart already for my trans problem and all 5 were still in specs I don't know your skill level/type of riding but if you're a novice rider and don't abuse the motor I guess that could be possible.

[yamaha250f]

Nah I pound it pretty good I used to ride alot at tracks Pappy and some others saw me ride back in the day like 2003 at Rausch Creek I jump good and pound trails fast and hard Also i do alot of riding at the carbondale coal hills. Not to mention i pretty much learned on this bike befor this i had a king quad and a sportsman 500.

[440bigborekit]

damn 7 years an no valve adjustemt i check mine like every week. theres no way your pounding down on that bike and the valves stay in spec for 7 years unless u have the god of 250fs lol mine need to be done like every 15 hours or so but i keep em in spec. thats cool tho 7 years with that motorwork and no valve issues and still a fresh top end damnn how often do u ride?