iv fitted a new engine to my dtr 125 the problem is i get about half hour ride each time full power lovely then it all of a sudden gets slugish reli bad then dies and will not start ! iv checked everything carb i have a spark ect then i change the spark plug and it work fine for the same amount of time now its done it agian ! is it possible its burning spark plugs of what !?? im on the verge of selling it !! lol
An abrupt stop would suggest electrics, a sluggish and spluttering would more than likely be fuel, you say about every few mins it keeps doing this? and about the same amount of time each time? I'd check the floats not sticking in the carb mate, as sounds like the bowl fills up with fuel, and you're running it down to empty each time without it filling back up as it should, also check the filter that sits inside the (fuel in) spigot on the carb, it could be full of ****e from your tank, and blocking the inlet up, has your tank been empty for a while? Just a thought.
naaa ist not carb or inlet all be checked and the fact i can get half hours ride with no problems happy for half hour then its reli slugish and soon as it gets turned off it will not start :/ 2 secenond time its done this now and cant solve it :/
how olds the top end or what sort of condition is it in? i had a kmx what did the same, piston was nakered and rings kept getting stuck in the grooves loosing compression complete strip and rebuild check every thing then ull find out did u have a look in the engine b4 fitting it see what it was like?
well its a 03 engine really ok sounds intresting and no i didnt strip the engine on the kick the compression feels good do you thats what it could be cuz wen i runs for around half hour it pulls well in the powervalve ect just dies after that and iv gt a spark and feul :/
only other thing it can be then is compression if sparks good and fueling right
check the head gasket / hed /cylinder warpage, crank case joint for leaks, spray some soapy water around the engine and idle it from cold if theres any leeks it will blow bubbles
could be letting coolant in when its all warmed up and has completed the heat expansion cycle
could be crank seals leaking/letting in oil
id never buy an engine off any one with out stripping it 1st, any one can say its in a1 condition, best way is to check/refurb ya self big wait off ya mind then pal
legend norfe once again i opend it up and surprised i was the piston was beat to f##k witch a massive chip out the side only one ring and the barrel is f##ked also im surprised it started at all rebore and over sized piston it is ! hahaahh
if its missing a ring id be getting worried about the wear on the bottom end! all that ring been ground up and passed round the engine would of been like grinding paste, id have a good feel at the big end and see if the main bearings are rumbling at all on rotation
warm the big end up with a blow tortch not mega hot just a good warm then check for play in it, no point building a new top end on a worn out bottom or it wont last 2 mins...
