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wopachop

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About wopachop

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    TT Bronze Member

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    California
  1. wopachop

    Shifting problems-do i need to split the cases?

    Thanks for all the help everyone. How much 2stroke oil should I pour down the holes to the crankshaft bearings? I coated them before installing the seals, so they're not completely dry. Do I add 3 drops or like 25 drops? Also should I wait until I'm ready for the top end? Will be another week before I would start the bike. (need power valve parts) Will do stator soon. I know manual has instructions but if anyone has tips I'm all ears.
  2. Have a yz250 and noticed a tiny bit of play between the clutch basket and main gear. Called a shop a year ago asking if they could somehow re-rivet them. Guy told me a small bit of play is normal. I trying peening them myself with a sledge. No luck. Wonder if i could drill them out and use the proper bolts like an aftermarket clutch basket would use? Or was the mechanic i spoke to correct that a small amount of play is nothing to stress about?
  3. wopachop

    Shifting problems-do i need to split the cases?

    Here is the c10 fork with grind markings. The other 2 forks didn't have them.
  4. wopachop

    Shifting problems-do i need to split the cases?

    Should the trans shift smooth in this orientation? I can make it go through all the gears if I lift and giggle the gears. I had bent the c10 fork. Wondering if I should replace the other 2 forks while it's open?
  5. wopachop

    Shifting problems-do i need to split the cases?

    Learned so much thanks again for all that info and confirming its the correct bearing. Do you guys think you can damage a bearing with a socket sideways over the inner and outer race nice and flat? That would suck to buy a new bearing and feel the same type of play all dry. l
  6. wopachop

    Shifting problems-do i need to split the cases?

    The bearing in question that has the metal shield on the back. Can anyone confirm its #2 in the pic? I'm not home to check motor. Unfortunately nobody is socal stocks it. Called 20 shops. Would suck to order the wrong bearing.
  7. wopachop

    Shifting problems-do i need to split the cases?

    Man thats a great idea. Can you pry the bearing apart somewhat easy?
  8. wopachop

    Shifting problems-do i need to split the cases?

    Is it possible the bearing is not damaged and that play is normal? I laid a long socket sideways across the entire bearing.
  9. wopachop

    Shifting problems-do i need to split the cases?

    Hi yes that bearing does have a shield on the other side. Wish i thought of Docs trick using the old bearing. I still have them. Wouldnt the old bearing push on both the outer and inner races? Since i assume they are the same height? I laid a long socket sideways and hoped that would not cause damage. I didnt line up the bearing well and had trouble driving it. Even froze all the bearings and heated the case. Some fell in. Others were a chore. Overall i was very very very disappointed in my bearing install. My hands were shaking like crazy. I called the local yamaha dealer in Hesperia and then Chapparell. Neither had that bearing in stock. Starting to freak out here. Currently in Orange Country. Is there a yamaha dealer known to stock lots of parts that others dont? Been busy i keep meaning to call around.
  10. What's the reason for lithium on the lip? I found my old old tube. Do you grease the outer surface of the seal with regular waterproof grease?
  11. wopachop

    Shifting problems-do i need to split the cases?

    Bearing didn't go so well. I think I jacked this one up. It has play.
  12. Putting the trans back together. The rocky mountain video shows the guy applying moly grease to new gears. But the manual says to use moly oil. The symbol for moly grease is different. Does it matter? Also for installing oil seals the book calls for a lightweight lithium grease. Which I bought 25 years ago and have some somewhere. But in the rocky mountain video the guy seems to be using regular grease. I have a tub of the blue maxima stuff I use for everything. Curious what you guys can teach about different grease and oil and when its critical.
  13. wopachop

    Engine Rebuild Help Needed YZ250

    Im just barely learning these transmissions but i would think if you can shift through all the gears smoothly then you might not have to pull out the trans. To me it seems like the shift drum and related parts would be the cause. I would pull off the shift wheel thing and rotate the drum. Feel for smooth operation and try to get neutral.
  14. wopachop

    Engine Rebuild Help Needed YZ250

    Thinking out loud here. What if you remove that little spring loaded wheel that stops the gears in each spot. Then see if you can at least get neutral? If he does get neutral, does that mean a shift fork is slightly bent so when that spring loaded wheel falls into the neutral spot it doesnt push the gears in the correct position? Other thought: Hey YzDoc are you saying to use both a gasket and also liquid gasket at certain spots? Is that common to "double up" in some spots? Meaning paper gasket mixed with liquid gasket maker?
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