Results 1 to 8 of 8

Thread: honda 250r questions

  1. 08-31-2011, 08:38 PM #1
    yamaha driver's Avatar
    yamaha driver
    yamaha driver is offline Just Too Addicted Arm chair racerJust too addicted
    Join Date
    Jan 2011
    Location
    Avon, Minnesota
    --
    641

    honda 250r questions

    well my 250r finnaly needs to be rebuilt was not running right yesterday real bogged down kinda sad i guess lol made sure its gettin fuel and stuff then checked compression it was at 100psi so i tore it apart today finding out it blew up once before the head was full of little indents/ gouges and the piston was just wore down real bad. so sent it out to my trusted machine shop to get a new piston/ bored and fix the head so im going 1mm over he is going to grind down the head and also he said its going to have more compression since he is doing that. so my questions are since i never rebuilt a 250r before how should i start out the new rebuild... what mixture and how to "break it in" since this is costing like 400 bucks i dont want to mess it up. thanks everybody
    1983 honda 200x 185 motor, Uni air filter, bassani exhaust, itp rims. FOR SALE!!!
    1982 honda 200 bigred cobra exhaust

    1989 yamaha banshee fmf gold pipes boost bottle k&n airfilter
    Reply With Quote Reply With Quote
  2. 08-31-2011, 08:44 PM #2
    Dirtcrasher's Avatar
    Dirtcrasher
    Dirtcrasher is offline Power User Catch me if you can
    Join Date
    Oct 2002
    Location
    Northeast
    --
    17,489
    Grinding/cutting the head lessens the compression so I'm not sure what he meant.

    Porting it may require larger juts but cleaning up a crappy head won't..........

    Ya just just break them all in the same way. Easy on the throttle for a bit, cool it off. A bit more throttle blips of 3/4 throttle and cool it off. Then run it but don't go nuts for a few times, change the tranny oil and then beat the snot out of it............
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country
    Reply With Quote Reply With Quote
  3. 08-31-2011, 08:49 PM #3
    yamaha driver's Avatar
    yamaha driver
    yamaha driver is offline Just Too Addicted Arm chair racerJust too addicted
    Join Date
    Jan 2011
    Location
    Avon, Minnesota
    --
    641
    well he said he is grinding down the inside and also shaving it down?? forgot to say that and should i drive it around like at 1/4 throttle and 3/4 like you are saying or just in neutral and how long of periods
    1983 honda 200x 185 motor, Uni air filter, bassani exhaust, itp rims. FOR SALE!!!
    1982 honda 200 bigred cobra exhaust

    1989 yamaha banshee fmf gold pipes boost bottle k&n airfilter
    Reply With Quote Reply With Quote
  4. 08-31-2011, 09:08 PM #4
    Dirtcrasher's Avatar
    Dirtcrasher
    Dirtcrasher is offline Power User Catch me if you can
    Join Date
    Oct 2002
    Location
    Northeast
    --
    17,489
    If he shaves it, the dome will have more compression; He is probably cleaning up the dome then shaving the gasket surface........
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country
    Reply With Quote Reply With Quote
  5. 09-01-2011, 04:14 AM #5
    ceaserthethird's Avatar
    ceaserthethird
    ceaserthethird is offline Power User Got the holeshot
    Join Date
    Mar 2006
    Location
    Oregon
    --
    2,471
    Watch out for the compression, If it's High you'll need to Run Race Gas!
    If you have Bought a item from me, Please leave me feedback
    If your buying a item from me check my feedback
    Click on link ~ http://www.3wheelerworld.com/showthr...ceaserthethird
    Reply With Quote Reply With Quote
  6. 09-01-2011, 09:14 AM #6
    yamaha driver's Avatar
    yamaha driver
    yamaha driver is offline Just Too Addicted Arm chair racerJust too addicted
    Join Date
    Jan 2011
    Location
    Avon, Minnesota
    --
    641
    na not going that high is a standard comp piston just had to fix head. and also how long should i drive it when breaking it in. i rebuilt oil injection 4 wheelers before and i knew you had to mix oil in the gas on a rebuild so on a 250r do u have to mix it stronger?? and if so what ratio. And thanks for the info
    1983 honda 200x 185 motor, Uni air filter, bassani exhaust, itp rims. FOR SALE!!!
    1982 honda 200 bigred cobra exhaust

    1989 yamaha banshee fmf gold pipes boost bottle k&n airfilter
    Reply With Quote Reply With Quote
  7. 09-01-2011, 11:06 AM #7
    Gripit'n'ripit's Avatar
    Gripit'n'ripit
    Gripit'n'ripit is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Nov 2007
    Location
    Rochester NY
    --
    251
    I've kept the fuel/oil ratio the same when i break mine in. I generally run it for ~5 minutes, enough to heat it up, then let it cool. Then run it for progressively longer times.
    81 250R Custom
    83 250R (in progress)
    98 Scrambler 400
    03 Bombardier Quest 500
    07 Polaris Predator (sold to klondike1020 )
    68 VW Dune Buggy
    Reply With Quote Reply With Quote
  8. 09-01-2011, 12:03 PM #8
    yamaha driver's Avatar
    yamaha driver
    yamaha driver is offline Just Too Addicted Arm chair racerJust too addicted
    Join Date
    Jan 2011
    Location
    Avon, Minnesota
    --
    641
    ok cool thanks alot and should you drive it around going threw the gears but at low rpms or keep it in first and just kinda putt around
    1983 honda 200x 185 motor, Uni air filter, bassani exhaust, itp rims. FOR SALE!!!
    1982 honda 200 bigred cobra exhaust

    1989 yamaha banshee fmf gold pipes boost bottle k&n airfilter
    Reply With Quote Reply With Quote
//ArrowChat Integreation Code //