havnt had one yet, ny1 tell me when il know il need one?

thanks rich  

what year? How do you ride? fast, racing? About every forty hours or so is the norm for a 250 two stroke. When it gets hard to start or running rough start checking on the top end.  

i ride fmx now and its a 2003 , it still starts first time n is easy to kick off so from that i take it iv got a while yet. just needed a rough idea of what il b looking for to tell me to rebuild  cos i havnt needed to yet, best to be prepared eh ? lol
what about mechanical noise? does it just stay as it is or does it start getting abit rough sounding?


thanks
write bk

rich  

Do you have a 2 stroke or 4 stroke?We have done both but 4 stroke takes longer and costs more.  

its a 2 stroke ,  if uv got ny other tips about em feel free to share , the more i know the better , iv been riding a while but just need to no more really.  

look for a loud slaping sound, kinda hard to describe but i can be piston slap. Hard starting, running rich, i think. Cant remeber if top end cuse a lean or rich conditon. Fmx is easy on bikes, engine wise. I ride fmx some, and its probably the easiest my bike gets it.  

Typically they get harder to start (and easier to kick); and generally feel down on power.  Fouling plugs (when you never did) can be a sign.

Its hard though because this happens gradually and you really don't notice it.

Thats why its good to do one after 40 hours or so and see what it ;looks like.  Then you have an idea how long to go for the next.  

I've seen 2-strokes run perfect until the moment they blew! And I've also seen them fall off on the power gradually - a topend failure is unpredictable.

Personally, I inspect my topends every 20 hours.  It's just not worth the risk of a kaboom.  There is absolutely nothing hard about inspecting a topend ona 2-stroke - if you need help, just holler and we'll walk you through it.  

ok guys your all helping me out loads. il probs take it to a shop to get it done first time but id like to be able to do it all myself one day ,
i dont suppose anybody has any tips on getting my rounded off plug out ?

iv managed to get it half way but its gettin kinda hard to do and i dont wana round it anymore than it already is. got a tray underneath catching to oil atm , i hate when things go wrong lol  

I am guessing you are talking about the oil plug. Use vise grips and get a new plug when you put it back in.  

Richy, you can EASILY do this in a day (or half a day) - sure you don't want to try it yourself the first time? it' not that hard.. we'll help ya!  

I gotta agree with skip on this one!  It is simple if you could see it done.  Check out this link:

http://www.youtube.com/watch?v=-FFIWtqU5Zc

These guys do all sorts of stuff and video it so you get a better understanding of what's going on.  Remember, these bikes are designed to be torn down so if you have some mechanical ability and tools, you'll save ***

Let us know if you get lost!  Most of us have done it at least once!  

i think im going to give the top end a go myself in a few weeks, iv gota replace my fork seals aswell cos i have some leakage , again with the problems lol
il give u a shout when i get going on it all.

thanks alot guys uv been awesome