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Thread: My "New" 350X Motor

  1. #1
    Join Date
    May 2009
    Location
    S.E. Michigan
    --
    1,251

    My "New" 350X Motor

    I've been in the process of rebuilding this motor for what seems like forever. All the case / cylinder / head parts have been powder coated satin black, all hardware has been re-zinc plated, 10.25 compression piston, mild port work, and lots of time. The reason it is taking so long is that I don't plan ahead very well. The last thing I need are the new dowels that hold the rocker shafts in the head. Then I'll be all set to button this up.

    I figured I'd post pictures now since it is almost done and people like pictures...

    Click image for larger version. 

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    - Frank

    1984 200ES Big Red
    1985 350X (x2)
    1986 350X
    1986 250SX
    1984 Auto-X
    1984 ATC70
    1985 ATC70

  2. #2
    pismorat's Avatar
    pismorat is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Dec 2005
    Location
    San Diego
    --
    207
    That's beautiful looking! How'd you do the cases and all? I'm trying to finish my '85 250R motor rebuild and would love it to look half as good as yours when I'm finished.
    '78 Honda ATC90 (132cc)
    '83 Honda ATC70 (88cc)
    '85 Honda ATC250R
    '86 Honda TRX200SX
    '04 Honda 400EX
    '73 Honda Trail 90
    '01 Honda XR70R (125cc)
    '16 KTM 500 EXC

  3. #3
    Join Date
    May 2009
    Location
    S.E. Michigan
    --
    1,251
    Thanks for the compliment. I took all the case parts / cylinder / head parts to a powder coater who did all the work. I had to have all bearings and seals removed from all parts. In reality, there were two bearings I couldn't get out: the deeper of the two clutch arm needle bearings and the kick starter needle bearing, but they survived the process just fine. The powder coater blasted all the parts and powdered them.

    Once all the parts were back, I washed them in the kitchen sink with hot soapy water and blew them dry with the air hose. Then all bearing (new crank bearings) and new seals were installed, and reassembly began.

    Regarding the hardware: I have a friend who is into street rods who was going to have some plating work done. I gave him two motors worth of hardware and he got it zinc plated for me for $20. I did have to clean everything up first (degreased and beadblasted heads) , but it wasn't too hard and the price was right.
    - Frank

    1984 200ES Big Red
    1985 350X (x2)
    1986 350X
    1986 250SX
    1984 Auto-X
    1984 ATC70
    1985 ATC70

  4. #4
    Join Date
    May 2003
    Location
    Houston, Texas
    --
    2,409
    Frank, that is absolutely amazing! Never seen anything so crisp and beautiful!!

    SEND ME PM HERE - CLICK HERE

    1986 ATC 250r, 1986 Tri Z, 1990 LT 500R "Quadzilla"


    Dirtbikes:

    1994 KTM 550 MXC (yes its a two stroke...66 hp stock!)
    1988 Yamaha DT

  5. #5
    Join Date
    Mar 2010
    Location
    Arizona
    --
    486
    That motor is shaping out to be top notch! It's this type of attention to detail that separates great work from good work.

  6. #6
    Join Date
    Jul 2012
    Location
    Penfield NY
    --
    660
    Very nice and a nice incentive for me. I'm going to do the same to my '82 250R motor this winter.
    "See, morbid and creepifying, I got no problem with, long as she does it quiet-like. "

    Trikes:
    1982 Honda ATC250R(in process), 1984 Honda ATC110, 1984 Honda 200s, 1985 Kawasaki KLT160(not running...yet)
    Quads:
    1990 Suzuki LT250S, 2013 Suzuki LT-Z400, 2014 Honda TRX450R SE

  7. #7
    Join Date
    May 2013
    Location
    Henderson, Tx.
    --
    975
    Turns me on!

  8. #8
    Join Date
    Nov 2010
    Location
    Oshawa, On, Canada
    --
    2,123
    Very nice work Frank, great job.
    1985 Honda 250r x2
    1986 Honda 250r
    1986 Honda 250sx
    1985 Honda 250sx x2
    1985 Honda 350x x2
    1986 Honda 350x
    1984 Honda 125m x4
    1983 Honda atc 70 w/ Lifan 125
    1984 Honda atc 70
    Yamaha tri zinger
    Yamaha 4 zinger
    Brap braaaap

    http://www.youtube.com/user/3wheelsoffroad

  9. #9
    Join Date
    Mar 2014
    Location
    New Brunswick, Canada
    --
    147
    I'll second that on the getting turned on over this type of stuff. Beautiful work man.

  10. #10
    Join Date
    Mar 2006
    Location
    Michigan
    --
    1,144
    Frank,
    That motor sure looks nice. I can see with all the time you have been spending on it, I can see why I will never get a Big Red poster. lol

    Hublake
    85 Big Red
    83 Big Red
    84 125m
    85 TRX 125
    73 ATC 70

  11. #11
    Join Date
    May 2009
    Location
    S.E. Michigan
    --
    1,251
    Thanks for the kind words everyone. I've probably gotten a little carried away considering this will be the replacement motor for my rider.

    Hublake: Winter is coming... I don't think this motor is going to take up another entire winter. I haven't forgotten!

    Another general question for the masses:
    I slathered my cam up with Honda moly 60. It isn't new and I'm putting the same cam back in with the original rockers, so there is no break-in issue I'm worried about. However, I am concerned about a fresh fire on the motor without a primed oil pump so I figured the moly was a good insurance plan until the oil system got oil to the top end. But I just read on another site that the moly is back for the clutch discs. I did read on another that it is no problem. So I'm wondering what I should do. I do have a tube of that reddish engine assembly lube to coat the cam and rockers. I wonder if I should clean the moly off of the cam and just use the assembly lube. Looking for opinions here.
    - Frank

    1984 200ES Big Red
    1985 350X (x2)
    1986 350X
    1986 250SX
    1984 Auto-X
    1984 ATC70
    1985 ATC70

  12. #12
    Join Date
    May 2013
    Location
    Henderson, Tx.
    --
    975
    I use Federal-Mogul assembly lube on the cam and journals, then, with EVERY 4 stroke I build, I pour a half a quart of oil into the head through the intake valve cover (it's canted at the perfect angle) before starting. Have not had a wiped lobe, scored journal, or "stick clutch" to date.

  13. #13
    Join Date
    Jul 2012
    Location
    Grand Rapids, MI
    --
    997
    Looking good Frank!!

    1984 ATC 200XR
    1984 ATC 300R
    1983 ATC 88


    Feedback for Mike Pargiello

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