DI1234

yea i actually checked that and there was no fuel filter attached

tigmaster

so when you pulled it out of the tank, there was nothing that looked like a filter? it would be a cloth-like wrap around a tube. then it is either inline or does not have one. however it should have one. if you throttle twists freely, then the fuel filter or even the fuel mixture is wrong. i know you have the auto mixer, but if it were to add too much oil to the mixture it will cause your bike to run lean with fuel causing the high revving.

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gscx

isnt that sorta backwards tig. i mean if you put to much oil in the fuel there wont be as much gas. and that means there wont be as big of an explosion, so your engine would run rich and cool

tigmaster

negativo, less gas and more oil means a leaner engine and oil isnt considered directly. basically, when you add oil like you were saying the amount of gas in the mixture goes down but since the oil is just along for the ride and isnt a combustible materail you dont directly consider it. no matter how you look at it leaner is always bad. leaner also technically produces a bigger explosion but is not as sustainable. this just produces a hotter and faster explosion. this actually means more power. thats why when you jet, you want light tan plug color which is slightly lean. this is safe however as you start to drop leaner and leaner engine temps rise super quickly. thats why a WHITE sparkplug is super dangerous and you shouldnt ride again until re-jetting. and you may ask, why cant i jet super lean then if i could deal with heat issues. answer to that is there will not be enough gas to sustain the engine at high speeds and you will get a lean condition backfire and the bike can cut out on the top end.

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gscx

i do see where you are coming from in a technical standpoint tig, it makes perfect sense. but in all reality more oil will coat the cylinder the more oil you put in your mixture. therefore the engine will have more resistance while reving up and the engine will run cool because of the more oil in the mixture. and when they come from the factory dealerships fill them up with a 15:1 mixture to allow all of the parts to break in and run cool. im pretty sure you are aware of this already though, since you do know alot. but the bike runs slow as crap while the break in mixture was in the tank because of the oil

gscx

im looking at more of a temp stand point than a lack of gas in the mixture

tigmaster

right, running that much oil is great for break-in because it will carry aware in metal shavings from the ring rubbing against the hone marks. i understand what you are saying as well. basically to an extent this concept matters but when we are talking about a bike that normally runs 32-40:1 15:1 is a huge step canceling this effect out. so you are right about that but when we are talking about a small change like 40:1 to 32:1 then the leaness factor does occur. i had trouble with this on my old rm80. it would cut out on the top end.

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gscx

yea jetting on a bike that small is a big pain sometime. youve got to get it close for it to be on. my 125 is real finicky about it. it alaways pops at the top when it is cold and dry like it is now here. nomatter what size main jet i put in and no matter where my clip is it still does it

tigmaster

ya, it took me a few tries to dial in my old rm80.

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DI1234

I finally got my bike running after about a week of putting it back together and trying to get it running. It's now running even better then when i took it apart. It used to put out white smoke like crazy, but does not anymore. it used to uncontrolably rev and now it dosnt. it used to not idle very good at times but now it idles just fine. im pretty happy with it how it is now especially since i bought it for 250 and all i had to buy for it was a new plug.