motovert losing power

[motovert24]

when i ride my motovert at a certain part of the track my motovert 125 loses power and it kicks me foward when it does it and that part of the track is just a small jump and a hill and then a table top but it doesn't do it on the table top

 

[twisties]

so when you are riding at 1 point in the track the bike dies, but thats the only time it ever does it?

maybe you're not in the right gear at the time (i.e. need to shift down a gear)?

maybe there wasnt enough fuel in your tank and when you got to that bit of the track all the fuel had sloshed to one side?

or maybe you need to re-jet your carby?

 

[motovert24]

it still had half a tank and i had it in thrid gear flat because its a straght but when that bit of the track i do go down to 2 gear i might take it some were to get fixed and thanks telling me what it might be

 

[Cactus Jack]

Maybe the fuel level is too low in the carb's float bowl so it sloshes around on rough parts of the track or under hard braking and causes the engine to hestitate a bit / lose power momentarily ... Stock early model XR75 carbs used to do that over ruts and just after landing from a jump ... only in their case , it was due to the size and shape of the float bowl ! ... In later models a shroud was fitted over the main jet and the float bowl shape was changed to solve the problem ...

 

[motovert24]

today i rode my bike and it just keeped on stopping [engine still running] but twice it died not just on that part of the track it does it and on that part of the track it won't work at all it did it on all 4 track i was at today after jumps straghts bumps everything and not rev sometimes i had to push it some times and i never have done that before only with no fuel

 

[twisties]

dude can you please just write proper sentences with correct spelling, i cant understand what the f*ck your saying. seriously, re-read the last thing you wrote, it makes no sense at all.

did you say it kept on stopping with the engine still running?

 

[motovert24]

ok i was rideing the bike on a track i went on a straght i twisted the throttle it was popping spiting [LOSEING POWER] AND STALLED but started again and it did every few meters after a hour do you get it now

 

[smallwheeldeals]

hey dude just a thought do a valve clearence sometimes motor will idle ok but play up in higher rev, china motors needs clearences done more often

 

[Cactus Jack]

Yes that's right ... checking the valve clearances is the first thing anyone with a weird running problem should do BEFORE messing around with ANYTHING else ... I gave up on telling people to check and adjust their valve clearances in every post ... LOL ...

Carbs are pretty stable if they've been tuned right in the first place ... ie IF the engine was running great before with those settings ... then it suddenly starts running wonky ... it's unlikely to be the settings or jet sizes ... more likely a blockage somewhere ... or loss of valve adjustment ... or a failing ignition ...

Whenever you get a sudden problem (sputtering , coughing , dying , hard to start , stally) ... ask yourself if you rode thru' water or hosed the bike recently or changed where you got the fuel in the tank from ie ... scabbed fuel off a mate and poured it from his moms filthy old mower fuel can or used a dirty old funnel ... Stinged out on the cheapest crap from some crusty old gas station 'cause it was 2 cents a litre cheaper than your usual fuel ... Dropped the bike and bent something (in the case of tranny problems) ... IF you work backwards ... you can usually discover the answer to the cause of most problems ...

For ignition problems ... the quickest way to check and save a heap of effing around is to hook an inductive pickup power timing light to your plug lead ... then look into the light with the engine running at various revs ... if the light is missing even the slightest beat ANYWHERE ... you know 100% dead certain that the ignition is at fault ...