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Thread: I need a new piston for my 185s.Options?

  1. #1
    StangLX302's Avatar
    StangLX302 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Question I need a new piston for my 185s.Options?

    Well, my poor 3 wheeler has been smoking for a few months now and now it barely even runs. It's time for an over haul. I want a piston that will bump my compression up a bit. I don't mind running race gas if I had to. I can get race gas all over town here.

    What are my options? Anyone make anything for maybe between 10 and 11 to 1 compression? How much can I SAFELY bore a 185s over? What is a fair price to pay for the bore job?
    1981 Honda ATC 185s
    -DG Exhaust
    -200x Carb
    -Uni Filter
    -Air filter box removed
    -10T Front Sprocket
    -Plastic fuel tank
    -Aftermarket seat
    -200s front forks/shocks
    -Aftermarket 4 bolt rear wheels
    -Tire chains when ice riding


    1988 Ford Mustang LX 5.0L
    -Wayyyy too much to list!!!

  2. #2
    Join Date
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    Go with a Wiseco 10.25:1 piston, and anly bore it enough to clean up the cyl. wall. Any more of a bore is just wasting future cyl. life.
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  3. #3
    StangLX302's Avatar
    StangLX302 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    I was just checking out Weisco web site and you basically have to use a standard sized 200s piston and bore it .080" over. Would that be OK?
    1981 Honda ATC 185s
    -DG Exhaust
    -200x Carb
    -Uni Filter
    -Air filter box removed
    -10T Front Sprocket
    -Plastic fuel tank
    -Aftermarket seat
    -200s front forks/shocks
    -Aftermarket 4 bolt rear wheels
    -Tire chains when ice riding


    1988 Ford Mustang LX 5.0L
    -Wayyyy too much to list!!!

  4. #4
    Join Date
    Nov 2001
    Location
    B.C.
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    933
    Don't overbore unless the cylinder is so bad that it must be done. Have you tryed looking at Pro-X pistons yet?
    I looked at the Wiseco site, and they are listing only a 200cc piston as a 185 replacement. You may have to go with just a normal comp. 185 piston, OR pick up a good 200cc jug and go that route.
    Another option is to buy a Honda 200X piston rather than an aftermarket unit. I did a 200cc machine recently, and the Honda parts were cheaper!
    Last edited by Mobular; 06-08-2004 at 09:45 PM.
    Join The Trike Registry Now!
    http://fly.to/TrikeHeaven

    Don't be cheap! Go buy a manual!

  5. #5
    StangLX302's Avatar
    StangLX302 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Quote Originally Posted by Mobular
    OR pick up a good 200cc jug and go that route.
    That will just bolt on without changing anything else?
    1981 Honda ATC 185s
    -DG Exhaust
    -200x Carb
    -Uni Filter
    -Air filter box removed
    -10T Front Sprocket
    -Plastic fuel tank
    -Aftermarket seat
    -200s front forks/shocks
    -Aftermarket 4 bolt rear wheels
    -Tire chains when ice riding


    1988 Ford Mustang LX 5.0L
    -Wayyyy too much to list!!!

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