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Thread: Tri-Z Engines

  1. #1
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003

    Tri-Z Engines

    Finally have all the bits to build the engine I’ve always wanted for my Tri Z. Cylinder goes in for a sleeve next week.

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    Last edited by El Camexican; 12-25-2021 at 03:02 AM.

  2. #2
    Join Date
    Aug 2005
    Location
    CT
    --
    206
    Looking forward to this build!

  3. #3
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Quote Originally Posted by floydechoes2000 View Post
    Looking forward to this build!
    Me too!

    Pulled the studs tonight and confirmed what I’d suspected ever since I found out that YZ pistons are taller than Tri-Z pistons.

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    No, it’s not that blonds are more fun than redheads, it’s that the YZ cylinder is a little taller. So for anyone pondering the Tri Z Wrench Report head modification AND a YZ piston l, make sure you check you squish band as you’re decreasing it twice as much with both mods.
    Last edited by El Camexican; 09-19-2019 at 11:25 PM. Reason: Cuz I can’t spell real good

  4. #4
    Join Date
    Mar 2010
    Location
    Slidell, LA
    --
    4,737
    Blinds are way more fun than redheads IMO.....
    Feedback for yaegerb: Click Here

    Need something blasted or polished or both? Send me a PM

  5. #5
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    I really need to stop using this talk to type feature

  6. #6
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Aftermarket Exhaust Spring Tabs. 12ga. steel. Contoured to the shape of the cylinder and guaranteed to out last your trike. Available in yellow or silver.

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    After they are installed you can bend them to suit any clearance issues or to adjust the tension on your springs.

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    I guess you could say that I’m selling them, but I have no idea how I would get them to anybody at this point. They would be cheap though, no more than $8.00 per pair plus shipping. If interested let me know and we’ll figure something out.
    Last edited by El Camexican; 09-20-2019 at 09:04 PM.

  7. #7
    Join Date
    Mar 2013
    Location
    Baldwin, Wi
    --
    603
    Welcome to the PV-Z club. I sure could use a couple of those spring tabs.
    85 Tri-z Power valve on Inverts
    85 Tri-z Basket Case
    01 gsxr750 engine/Tri-z frame (long long way from complete)

  8. #8
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Quote Originally Posted by NeverLift View Post
    Welcome to the PV-Z club. I sure could use a couple of those spring tabs.
    Silver or yellow? PM me your phone # again and I'll call you next week.

  9. #9
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Took longer than expected to ship it to Kustom Kraft as I wanted to save on shipping by sending 3 cylinders out in one big big, but it’s back now.

    I lucked out and got away with another bore instead of the expected sleeve job.


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    Hoping to cleanup the ports over the holidays.

  10. #10
    Join Date
    Jun 2010
    Location
    House Springs MO
    --
    5,496
    Looks good man and the spring tabs are really nice. Having despised Yamaha for most of my life, I feel that I've missed out on owning one of these bikes in running condition.

  11. #11
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Quote Originally Posted by bkm View Post
    Looks good man and the spring tabs are really nice. Having despised Yamaha for most of my life, I feel that I've missed out on owning one of these bikes in running condition.
    The one you did have for a short while had a lot of rare parts. Whatever happened to that trike?

  12. #12
    Join Date
    Jun 2010
    Location
    House Springs MO
    --
    5,496
    Quote Originally Posted by El Camexican View Post
    The one you did have for a short while had a lot of rare parts. Whatever happened to that trike?
    Got smart and traded it for a 250r.

  13. #13
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    My three wheel obsession has been reactivated by a future ride, so last night the cases on the soon to be PV engine were opened up.

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    Got a chance to use my dowel puller, sure beats Vise Grips.

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    I soon came to realize that there was a hack inside this thing.

    Sesame Street song playing.... One of the things does not belong.

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    Glad it didn’t ruin the cover, these things are selling for stupid money.

    Then I tried to get the sprocket nut off only to find out someone had put a tiny spot of weld on it to the lock washer. It was almost impossible to see, but the burn hole on the washer was the give away.

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    The cherry on the cupcake was finding that they’d welded the shift drum follower wheel solid.

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    Seems the bearing on the shift drum (which can’t be replaced) is seized, so off to eBay I went. I hope the shift forks aren’t bent as the guide is bent and the shift shaft was hard to get out.

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    Here’s where we’re at now.

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  14. #14
    Join Date
    May 2006
    Location
    The Open Road
    --
    4,729
    Wow, that escalated quickly

    Sent from my Z958 using Tapatalk

  15. #15
    Join Date
    Jan 2010
    Location
    Sulphur Springs,Texas
    --
    1,005
    Hopefully you’ve found all the hacks an everything else goes smooth for you. Where you able to find a replacement shift drum?
    • 1985 Honda 250SX
    • 1985 Honda 350X
    • 1985 Honda 350X
    • 1986 Honda 250R



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