yx140

Mini Dirt Bikes & Pit Bikes Forum

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  1. K

    Bought Frankenstein bike, engines been stripped and reassembled, carb cleaned still won't run

    Hi, this is my first post on a forum, i recently bought a 140cc "demon X" pitbike, it has had a full engine rebuild by a semi skilled mechanic who i trust to have done a good job, i have cleaned the carb out and it has all been put back together. I started all the work because it was running...
  2. M

    Slam MXR 160

    I've recently bought a Slam MXR 160 (YX 160 engine) and think it's quite sluggish more like a 140, I think it's got a mikuni 30mm on it, but the cheap one with the flap switch choke it's like 20 quid on eBay I think it's what it comes with from new this may be the culprit, what's a good carb or...
  3. P

    high comp piston yx140

    Hi I have a question regarding the fitment of a high compression piston to an otherwise stock yx140 engine +( oko26 s38 m96 ) (outer rotor kit ooracing) This piston I bought from DHZ ( 56mm 13mm pin). can I fit the piston with no worries or is there anything else I should do? thanks in...
  4. rotn50

    And it was still running.

    Got a PSTO in at workt he other day with a rattly engine, being a yx140 I thought the slinger bolt had come loose, so I pulled the case off and well I must say it was a lil messy. The slinger had fractured to the point it became separated from the crank and got jammed between the case and...
  5. D

    yx140 cam issues, anti kickback

    I just put a head back on my engine after I have reseated the valves and put in new piston and rings after a quick hone of the bore. Put it all back together and I have 0 compression. There is no leaks through new head gasket and head bolts are tight. So what is it? My thoughts are on the...
  6. my67xr

    Eliminating side play in your shift drum ZS155 shown, but should work on most horizontal engines

    http://www.youtube.com/watch?v=ILvFDhWWdFE
  7. mr_plow

    getting new frame, need help before buying

    hey guys, this is my current setup, old pic but pretty much the same Im wanting to change the perimeter frame to a normal chromolly klx frame. im pretty keen on an Atomik as they are $137 shipped Chromoly Frame KLX style EK36 Im going to be pairing it with a DHZ alloy swinger...
  8. ajaay

    a question of engines

    alright so my mate wants to swap my yx140 big bore out of my nitrous for his zongshen 150 ? is it a good swap should i do it whats the differences? and which one is generally the better motor ? thanks guys it wasnt getting answered in the tech masters section so i thought id post it here :\...
  9. ajaay

    yx 140 vs zongshen 150

    alright so my mate wants to swap my yx140 big bore out of my nitrous for his zongshen 150 ? is it a good swap should i do it whats the differences? and which one is generally the better motor ? thanks guys :)
  10. pitsterprobrendan

    boyesen ignition cover

    howdy guys just looking for a boyesen ignition cover to fit my 160 pitsterpro any one got any links
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