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Discussion Starter #1
hey im wondering what type of gear oil you guys are running? i used to run bell ray gear saver or honda it was 80w90 i think but i was looking in the service manual and honda reccomends 4-stroke 10w40? i don't know whats best? ive got 2 ct big bore 250's lots of strain on trannies i want to run the best stuff i can.
 

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The best stuff is the stuff you can afford to change often. Im not convinced there is any difference between the expensive cycle specific oils and reagular motor oil or gear oil. I get 2 gallon jugs of either 10w40 or 85w gear oil for like 8-10 bucks, at a farm supply store. Rotella heavy duty motor oil is good stuff too

The most important thing is fresh oil. Two rides is all Ill ever go on oil, inexpensive oil makes it affordable. Just because it cost less doesnt mean its junk either.
 

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The best stuff is the stuff you can afford to change often. Im not convinced there is any difference between the expensive cycle specific oils and reagular motor oil or gear oil. I get 2 gallon jugs of either 10w40 or 85w gear oil for like 8-10 bucks, at a farm supply store. Rotella heavy duty motor oil is good stuff too

The most important thing is fresh oil. Two rides is all Ill ever go on oil, inexpensive oil makes it affordable. Just because it cost less doesnt mean its junk either.
what he said
 

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type F ATF........never had a problem, just have to change it frequently.
 

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i run napa brand it cheap and i forget who makes it for them but it one of the big name brands i never go more than two ride with out changing it. if i ride really hard i change it after every ride.
 

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I'm using Amsoil Synthetic 10W-40 cause I had some left over from my stolen Predator. So I put a few more rides on it, but I'm still changing about every 6 rides or every other race.
 

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I've been using the honda CR transmission oil for a long time. It's 85w I think. Probably more expensive than most of the other suggestions. Seems to work good.
 

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i use 75w 90 gear oil
 

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Discussion Starter #11
ok but isn't it a pretty good jump from 10w40 to 85w gear oil. i mean in the thinkness of the oil. i think that its probubly best to stick with gear oil on gears not standard motor oil. so i think ill stick with 85w,and yes i do change my gear oil every other race i think i was using honda 85w last season, and yet i still manage to shoot chuncks of broken gears through the bottom of my case on the last lap to loose that race :angry: . yet a few years back my buddy ran a 95 cr 125 for like 6 seasons on the same gear oil go figure :huh:
 

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motor oil and light weight transmission oils all work fine. you didnt break gears because they weren't lubricated, you broke them because they were old and over stressed. if i remember correctly the 450R shares its motor oil and its gear oil. im pretty sure its not running W85 gear oil through the top end. theres nothing wrong with running a high performance gear box specific oil, but if your spending more than $2.50 a quart your waisting money. go to walmart and buy a gallon jug of Shell Rotella-T or if you want the gear oil, go to tractor supply and buy the 2 gallon jug of W85 gear oil.
 

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Discussion Starter #13
motor oil and light weight transmission oils all work fine. you didnt break gears because they weren't lubricated, you broke them because they were old and over stressed. if i remember correctly the 450R shares its motor oil and its gear oil. im pretty sure its not running W85 gear oil through the top end. theres nothing wrong with running a high performance gear box specific oil, but if your spending more than .50 a quart your waisting money. go to walmart and buy a gallon jug of Shell Rotella-T or if you want the gear oil, go to tractor supply and buy the 2 gallon jug of W85 gear oil.
thanks but the 450r has seperate trans and motor oil
also is just changing oil frecuently the only way to keep me trannie alive?
 

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yes changing it frequently is the key. you want to get any impurities out of the system, clutch particles and water and dirt that might get into the system. im pretty sure one of the 450 bike/quad motors, shares or did share transmission and engine oil. i guess it wasnt the 450R
 

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Discussion Starter #15
thanks any other tips on keeping trannies from handgranading. i thing that the ltr yfz and kfx all share trans +motor oil the only one different is the trx which gets me thinking why.
 

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best way to keep the tranny togther is to buy all new gears. 250R trannys are strong, but anything weakens after 20 years of use.
 

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can you still buy oem, or do you have to get yukon
 

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can you still buy oem, or do you have to get yukon

pretty sure you can get all of them for all years.
 
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