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Thread: Need help - ATC250R...20 over....what compression?

  1. 04-08-2005, 08:00 PM #1
    CodyRx7
    CodyRx7 is offline New to the board Arm chair racerNew to the board
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    Question Need help - ATC250R...20 over....what compression?

    I have a 250R in the shop now, and the tech is just guessing at low compression. What should my reading be with a 20 over Wiseco piston?
    Current Machines:
    1983 Honda ATC250R
    1983 Yamaha YTM200
    1995 Kawasaki Mojave KSF250
    2004 Kawasaki KFX250 Mojave
    2005 Kawasaki KFX400 - orange
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  2. 04-09-2005, 01:37 AM #2
    hrc85250r's Avatar
    hrc85250r
    hrc85250r is offline Someone put sand in my panties. Roostin Away
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    ive been told that according to honda specs stock compression is somewhere in the ballparks of 190 psi, but that is just what ive been told... call up a honda dealership and ask them, they should know...
    1985 Honda ATC250R drag trike with s/t kit and full drag CR hybrid motor and drag chassis...
    1986 Honda ATC250R daily rider fully modded engine, +4 swinger,etc...
    1997 Polaris Storm 800 triple, boyesen reeds, dg individual silencers, 240 studs, 123mph on radar...
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  3. 04-09-2005, 01:58 AM #3
    RideRed250R
    RideRed250R is offline Power User Roostin Away
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    i second that 190-195 depending on piston i have been told that the super-lite raises the comp alittle, mine with just a high performance piston runs 190
    adam
    86 ATC 500R the duner..
    85 ATC 500R...the not quite finished faster duner
    1985 ATC 250R Bone stock!!
    1985 ATC250R mx/duner
    1986 TRX370R MX/Duner
    94 Banshee 400PV Cheetah 105RWHP
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