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Old March 18th, 2010, 07:58 PM   #1
BigBlkYJ 355
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Default Yamaha crankcase oil

I've been workin on a 73' Yamaha Enduro 175. I split the case today to take a look at the clutches and and crankcase oil. My question is what is suppose to be run in these things. Ive read 10W-30 and 10W-40. Just want to be sure before i fill it back up with that.

Also what do you think about using either silicone or Permatex 2 for putting it back together. I don't think I'm going to find a crank gasket very easily.
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Old March 18th, 2010, 07:59 PM   #2
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does it have 2 or 3 spark plugs?
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Old March 18th, 2010, 08:00 PM   #3
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2 or 4 stroke. RTV works good as long as you let it dry completely before refilling. i've used it when redoing bike engines and never had an issue as long as i let it dry first. the one time i was impatient it leaked like a sieve.
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Old March 18th, 2010, 08:02 PM   #4
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Its a 2 stroke, oil injected. I'm asking about the crank oil though not what to burn. 2 plugs single cylinder
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Old March 18th, 2010, 08:04 PM   #5
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i was just wondering

i had a 78 360-it had 3 plugs

i always ran kawasaki full syn. 10-40

never had a problem, bike still runs to date
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Old March 18th, 2010, 08:08 PM   #6
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Had 3 plugs for the 1 cylinder? I assume (since I don't know much about this bike) that it is just for when ur on the trail and foul one out you just move the wire and keep on goin.
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Old March 18th, 2010, 08:32 PM   #7
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well i ask because 4 strokes use crankcase oil in the gearbox. 2 strokes have separate oil for the gearbox. i've had a few 2 stroke bikes, and i've always run bel ray gearbox oil. some people run straight 30W motor oil, and some run ATF. i run the oil designed for the gearbox to avoid causing problems with clutch friction material. my last bike had atf in it and the clutch would slip. i flushed it and run real gearbox oil then the clutch gripped great.
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Old March 18th, 2010, 08:37 PM   #8
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i just looked it up that belray 2 stroke oil is 80W.
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Old March 18th, 2010, 08:55 PM   #9
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I didn't see any other place to add oil ill have to look tomorrow when i'm back down there. I'm not sure if it has separate oil or not. The side I opened (the only real good access) had the clutch setup in there.
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Old March 18th, 2010, 09:05 PM   #10
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I run ATF Type F in my 250 2-stroke dirtbike. I'm not sure about those old dinosaurs though.
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Old March 19th, 2010, 12:04 AM   #11
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Quote:
Originally Posted by BigBlkYJ 355 View Post
Had 3 plugs for the 1 cylinder? I assume (since I don't know much about this bike) that it is just for when ur on the trail and foul one out you just move the wire and keep on goin.
yea thats what i was told it was for but i ran 2 spark plugs and a decompression lever
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Old March 19th, 2010, 12:05 AM   #12
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I didn't see any other place to add oil ill have to look tomorrow when i'm back down there. I'm not sure if it has separate oil or not. The side I opened (the only real good access) had the clutch setup in there.
theres no oil fill plug on the front right side(if your sitting on the bike) of the motor?
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Old March 19th, 2010, 12:09 AM   #13
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If ur on the bike there is a fill plug on the right by the kick-start, but this is the oil that i'm talking about which is also the oil that the clutch is using. The kickstart, maingear, speedo gear, and injection pump gears are all in this area also. On the left would be the side with the sprocket and gearset. There may be a different type of plug there also, ill have to look tomorrow.
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Old March 19th, 2010, 12:17 AM   #14
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should post pics

and on my bike i eleminated the oil injector, i prefer to mix my own gas
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Old March 19th, 2010, 12:37 AM   #15
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Yea i thought about that too, all the Yamaha guys seem to love the pumps on em though. Its also variable oil injection, meaning when you turn the throttle the amount of oil changes. The pump seems to work fine now, so we'll see.
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Old March 19th, 2010, 12:38 AM   #16
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Yea i thought about that too, all the Yamaha guys seem to love the pumps on em though. Its also variable oil injection, meaning when you turn the throttle the amount of oil changes. The pump seems to work fine now, so we'll see.
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Old March 19th, 2010, 12:51 AM   #17
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would you have any intrest in a 79 ke 125?
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Old March 20th, 2010, 04:11 PM   #18
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No, not really the only reason i have interest in this was because it was given to me. Thanks though
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