X7 REPSOL build

By: darthbeast1983
October 30th, 2011
11:12 am

X7 REPSOL build

ok so i really havent worked on my X18 in a while but we will talk about that later. so when i moved to ohio i had 2 X7's one was a parts expiriment bike, the other just kinda sat there. it ran but i did a head chop and pretty much made a monster out of my yellow x7. so i was bored and completely disassembled the other x7. this is the build. please, ive already make a good 49cc motor. but im hoping cam2 or one of the other resident mad professors will chime in and tell me some more tips and tricks to unlocking even more power out of this thing.">">">">">

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38 comments on "X7 REPSOL build"

  • darthbeast1983
    November 3, 2011 at 11:50 am

    still no parts yet...ported the cylinder though and found out i need a new wrist pin bearing.....

  • CAM2
    November 3, 2011 at 6:19 pm

    Seeings your changing the piston and rings you should also replace the pin and pin bearing...........It all goes hand in hand and will insure a descent topend refurb.......

  • darthbeast1983
    November 4, 2011 at 8:29 am

    yea i know, just like im replacing the crank bearings and seals. im pretty sure i ordered a new wrist pin bearing...i ordered a piston kit, 4 lower head gaskets, new cylinder to intake gasket, carb to intake gasket, head to exhaust gasket. v stack, hp clutch spring and a rocket key. im gonna do a shaved flywheel

  • darthbeast1983
    November 6, 2011 at 9:28 am

    so i got all my stuff yesterday except for my spark plug. got the engine assembled and i must say it looks scary fast...especially with the fatty pipe on it. heres some pictures
    [IMG][/IMG]

  • darthbeast1983
    November 6, 2011 at 9:30 am



  • darthbeast1983
    November 6, 2011 at 6:36 pm

    ordered the fuel lines, non electric start twist throttle, primer bulb, and throttle cable. hopefully ill hear her roar to life by weeks end. im not throwing any electronic stuff on for weight savings.

  • rexmitchell
    November 6, 2011 at 7:30 pm

    Nice build and looking great :)

  • darthbeast1983
    November 7, 2011 at 7:06 am

    Originally Posted by rexmitchell
    Nice build and looking great :)
    hey thanks admin! hopefully i will get my spark pluug today, if thats the case ill be sure to video it and post it!

  • darthbeast1983
    November 7, 2011 at 11:34 am

    well i got good news and bad news. i got my plug BUT i have huge issues with the head. had everything looking great and it ran for a second but i lost all compression. i guess when i did the chop i took tthe walls too thin. so i ordered a ported 1 piece head. im just gonna run a 1 piece setup sadly....but im sure with my ported piston and my ported head and widening the ports on the intake and exhaust should be good. im really bummed though...oh well i guess you cant win em all

  • darthbeast1983
    November 8, 2011 at 10:07 am

    well i took the head to a local machine shop and there machining it right now. there taking .010 off and making sure its a true flat level deck. thats why it failed yesterday...so hopefully it will be ok



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