I have a 2005 kx 250 and need to change to big end as it has seized how do you go about this as you would need to split the engine mike van eyk

A KX 250 has no timing it is a 2 stoke motor are we sure it is KX 250 and not something else ??

Just remove the right side cover to expose the kick start mechanism. Remove the bolt on the end of the shaft, tow washers and guide then the spring. It has been awhile since I worked on the KX 250, but as I recall, the clutch does not need to be removed in the process of replacing the spring. I could be wrong on that. Below is the kick mechanism on your bike. Please rate my answer. Thanks.

im presuming its a two stroke it sounds like the two stroke oil pump-which is starving the engine of oil-change the pump before u destroy the engine-this is not a maybee,your engine will need a total rebuild if u carry on riding with this problem!!!!!!!!!!!!!

hi,no easy answer i,m afraid,you will have to split the engine,before you pull it all aprt check the shift drum selector rawl pins,if one of those has come out,it will not shift up into the next gear,hope this helps...cheers

Empty the for again and re-measure 300cc or a little less else try reduce it to 220-250cc.

Two stroke motors with wet clutches are notorious for sticking when left for a period. Older oiler will leave a slight residue on ends of friction plates. If it is a regular thing after every stop, you will need to rinse clutch with a solvent. You don't need to dismantle if you are patient and carefull when applying solvent as it may discolour alloy cases and paintwork. Use a premium grade MOTORCYCLE GEAR OIL only and your problem will be solved if your clutch is A1 mechanically.

hi,most two strokes in the mx range run about 40-1,but me being me i always prefer to run my 2 strokes a little bit oily around 33 or 35 -1,2 stroke oil is very cheap compared to scored barrels or seized big ends...cheers

Hi
Both seized.
For the gas tap, spray CRC lube on it, leave for an hour then gently use grips to move it.
For the clutch, need to know if its the cable or interanl clutch. Disconnect cable from engine and try, if OK its internal. If its clutch cable remove from bike and try to spray / fill cable and leave elevated for and hour / day. Then start see sawing cable to free up.

run 40:1 for starter wull seize engine iff not enough oil and the plug use a BR8EG the g stands for racing use or the BR8EIX IRIDIUM PLUG

buddy you have to split the engine in half to do this also heat the bearing up which will open them up buddy