Oil change fixed the transmission..?

Discussion in 'Tech Area' started by Jlloyd, May 5, 2018.

  1. Jlloyd

    Jlloyd New Member

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    I appreciate the info. I'm still blown away that of the CT70 forums that are out there, this is the one I randomly joined and it happens to be the one that a PO of this bike is a member.
    I just assumed that Larry (I think that's his name) got it pretty cheap or free and wanted to work on something in his spare time and maybe make a few bucks. He didn't GIVE it away, but considering all the newer parts (cables, levers, carb, CDI, etc) on it, I think I got a fair deal. Hell, the Michelins still have the little nipples on em! Speaking of..these street treads are awful in the dirt. Knobbies are high on my list of parts to buy.
     
  2. preventec47

    preventec47 Member

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    Twenty quarts at Five dollars a quart incl shipping. Is that a good deal ? What does good oil cost by the
    individual quart and where is the most economical place to purchase it ? Do auto parts stores or Walmart
    carry motorcycle oil ?
     
  3. GRudicel

    GRudicel New Member

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    Where did you buy your oil? I would like to get some. Thanks
     
  4. OLD CT

    OLD CT Well-Known Member

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    Keep in mind I said I use SAE50 in a 1972 ironhead Harley XLCH Sportster, it's a little too thick for a ct70. It has gone up since I purchased it, to $113 shipped on ebay from Summit racing. You are better served buying Valvoline 20/50 4 stroke M/C oil from autozone/advanced auto/pepboys etc.
    That is what I use for ct70's.
     
  5. preventec47

    preventec47 Member

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    I shopped around for Valvoline 20/50 4 stroke M/C oil and found that Walmart has it in FULL SYNTHETIC
    for way less than $8 a quart for a three pack ( three quarts ) .... with FREE shipping if you add in a few more
    things on order to reach $35 minimum. This is a much better deal than any of the AUTO PARTs stores
    by a long shot.
     
  6. OLD CT

    OLD CT Well-Known Member

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    Let's see a picture of it. BTW, you are not supposed to use FULL SYNTHETIC oil in a ct70. Never heard of Walmart having full synthetic motorcycle oil.
    In the spring, Autozone has the oil I speak of on sale.
    Full synthetic oil will get past the ''old crude seals and gasket surfaces'' and leak worse than a old Harley. I do see it online and yes it is a good price. I never see it on the shelf though.
     
    #26 OLD CT, Apr 6, 2019
    Last edited: Apr 6, 2019
  7. cjpayne

    cjpayne Well-Known Member

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    OC is right. I made that mistake once by putting full synthetic oil in a K1 I had. Leaked oil out of every orifice it could find. It even started oiling the chain.lol
     
  8. preventec47

    preventec47 Member

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    ////////////////////////////////////////////////
    I dont know why you think you are not supposed to use Full Synthetic in a CT70? Truth be known... what they call Full Synthetic is not really a real synthetic oil..... just that its specs when new equal synthetic. This due to Castrol suing
    Mobil about 20 years ago. Walmart sells stuff on line that is not in its stores. In fact they represent thousands of other
    businesses and sell their stuff as well much like Amazon which they are trying to compete with.
    What would you like to see a picture of ? The bottle of Valvoline or my motosickel ? As far as leaking goes, we are talking viscosity and molecule size. No way that being fake synthetic is going to cause more leaks if same weight oil is used.
     

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  9. dirtbkr188

    dirtbkr188 Active Member

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    You might want to do a search on here and a muriad of other pitbike Forums and read the hundreds upon hundreds of threads and posts with regards to using a synthetic oil in these little bikes. Then you'll have a better understanding of why it isn't used, along with the wide variety of reasons.
     
  10. OLD CT

    OLD CT Well-Known Member

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    OK, if you say so. I stick with what I said about it creating leaks. If it's fake, why spend the extra money for it.
     
    #30 OLD CT, Apr 8, 2019
    Last edited: Apr 8, 2019
  11. preventec47

    preventec47 Member

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    OK, if the advertised Full Synthetic is made from the same base stock as conventional oil
    (and is NOT made with synthetic base stock as it was 20 years ago )
    but with better properties,, explain why it behaves any differently. We know exactly what makes
    motorcycle oil different than auto oil.... so why cant anyone tell me what about slightly improved
    properties of the full synthetic causes problems. Dont you think the oil companies would be
    subject to some liability if there truly was a problem with its stated intended use ?
    I feel confident they would do the necessary lab studies to figure it all out. We are talking about
    what... at least eight or ten major petroleum companies. I'm fine with everyone using what they
    want but I hate to see old wives tales and rumor mongering in action. Lots of innocent people are
    susceptible.
     
  12. OLD CT

    OLD CT Well-Known Member

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    I did explain it to you in my post. You choose to think different. If you have seal technology and tolerances from the 1960's before this type of oil was ever formulated. Also, It's not a wives tale. I tried it and didn't like the results. Watch for the shifter seal to be the first to leak.
     
  13. red69

    red69 Well-Known Member

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    preventec47, that suit you mentioned was Mobil challenging Castrol about their claim of "full synthetic" in which Castrol won. Their Group III base stock was sufficiently changed to be recognized as full synthetic. From what I've read, all synthetics have crude as a base in different quantities, be it modified or otherwise.

    I think where you may run into trouble with synthetic is the friction modifiers added to the oil. The oil I use is for wet clutch systems and the discs will not tolerate the extra slippery stuff.

    How about running some of that slippery juice in your engine and let us know if you have any clutch problems or leaks. That should answer it.

    For now I'm going to stick with Valvoline conventional wet clutch protection oil. I don't need a long-change interval oil because the system demands frequent changes due to its filtering set-up.

    Bob
     
  14. darrel gunderson

    darrel gunderson Active Member

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    I ran Motul 15-50 wt 100% synthetic motorcycle racing oil in my last 117stroker bike and never had a problem ? I noticed my oil temps dropped on my temp dipstick probably 10 degrees, and that was what I was looking for mostly... Just saying.
     
  15. red69

    red69 Well-Known Member

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    Darrel, is that a semi-auto?
     
  16. preventec47

    preventec47 Member

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  17. red69

    red69 Well-Known Member

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    The bottom line is.......Will it cause more leaks?
     
  18. darrel gunderson

    darrel gunderson Active Member

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    No sir. Its a 4 speed with manual clutch.
     

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