//ArrowChat Code
Results 1 to 6 of 6

Thread: UPDATE!....Help! Engine problems

  1. #1
    troy's Avatar
    troy is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Aug 2006
    Location
    Canada
    --
    254

    Exclamation UPDATE!....Help! Engine problems

    Hey guys, i really need some help here with my bike. I own a yamaha tri moto 200ern, I had to replace the head the other day, because the old one the exhaust couldn't bolt on any more because the treads where striped. IT was running fine exept for the backfiring ect, because of the bolt not able to be tighten. i change the head as planed and put gasket sealer in the proper places like the bottom cylinder, top of the cylinder and the head, so oil leaks are out number. the problem is i can't keep the bike idling. it dies as soon as i let go of the gas. the carb wasn't touch at all, execpt when unbolting it from the flange on the head. While it's moving it sound alright, but as soon as i stop the engine dies, Also i'v notice a little burning of oil happening from the exhaust. could this be a sign of new rings needing to be put on?.....I hope some one can help..

    P.S in order for me to start the bike i have to have the Throttle about 1/4 to 1/2 open before it will start


    Thanks
    Last edited by troy; 08-16-2006 at 07:46 PM.

  2. #2
    Join Date
    Feb 2004
    Location
    Columbiaville, MI.
    --
    1,508
    Typically I work on Honda's and would'nt be able to advise you at all,but I just put a top end on a'89 YMF 200 and I know they are pretty much the same other than the compression release ! A few questions,Did you put on new gaskets or did you just put on gasket sealer? Did you swap all the topend components ,such as cam,valves -cam gear,etc,or was did the new head you put on just drop on ? And when you put on the head did you double check the timing with a timing light ? The reason I ask is all of this is very critical when doing a swap! Even a headgasket can look fine but I guess all heads are not created equal,meaning these heads are not the same unless you had it milled ! Kinda like sprockets and chains wear together so would the head components !! Save the headache and always use new gaskets,threadlock and torque to specs when doing a job like that!! Did you torque it down?
    www.muddogs.org - My New Website

    MDR Racing

    Trikefest '06 '07 '08 '09 Survivor !!!!
    LONG LIVE SANCHEZ RACING

  3. #3
    troy's Avatar
    troy is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Aug 2006
    Location
    Canada
    --
    254
    i did a compression test tonight, i have any where from 50 to 70 psi, When i pull it over at a normal speed i get 50 psi, when i pull it over faster i get 70 psi..I going with the thought of new rings and complete top end gasket kit, head gasket and bottom gasket. When i put the new gaskets on should i use some bond like yamabond?. also is there any where else the compression could be leaking?

    P.S what should the psi be, i always though 120 PSI

    Thanks
    Last edited by troy; 08-14-2006 at 09:27 PM.

  4. #4
    Join Date
    Nov 2002
    Location
    Kirkville, NY
    --
    3,831
    Quote Originally Posted by troy
    i did a compression test tonight, i have any where from 50 to 70 psi, When i pull it over at a normal speed i get 50 psi, when i pull it over faster i get 70 psi..I going with the thought of new rings and complete top end gasket kit, head gasket and bottom gasket. When i put the new gaskets on should i use some bond like yamabond?. also is there any where else the compression could be leaking?

    P.S what should the psi be, i always though 120 PSI

    Thanks
    When you do the compression test are you having someone hold open the throttle for you?
    1984 Yamaha YT 60 Tri Zinger(current project)
    1983 Yamaha YTM 200 (rear suspension kit)..... long term project
    2004 BMW R1150R
    1972 Honda CT 70
    2007 Lifan 110

  5. #5
    Join Date
    May 2006
    Location
    illinois
    --
    743
    well it sounds like it needs a new set of rings
    i use indian head sealer -shellac,with gaskets-just extra protection
    hone out the cylinder ! -(de glaze)
    and at least lapp the valves!!--(valve grinding compound,and a drill chuck on the top of the valves,is faster and better than your fingers) new valve seals!

  6. #6
    troy's Avatar
    troy is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Aug 2006
    Location
    Canada
    --
    254
    I had to try it again, I run the bike for about 10 minutes and check the compression, it has 126 PSI.....after 4 pulls and open thottle....and as for the not idleing i played around with the thottle cable and it idles with the idling screw...What gives... ...or is it still playing with me?

//ArrowChat Integreation Code //