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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
seized engine ?
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[QUOTE="adam_co, post: 1186069, member: 76965"] Before i say anything im just going to say this is exactly why i got rid of the 2 stroke kx80 and got the dr250 4 stroke, right,the oil you have drained is gearbox oil, they are on about lak of 2 stroke it is totally seperate to the gearox oil, like the guys have sed it can be lots of things, it could of been you were just due and new piston and rings or one of the other things, you need to take the head off and see if the barrel is scored(this is where the piston rings have scraped the barrell and makes the engine incompressed, if the barrel is scored you need it either bored out,relined or a new head(will cost a bomb for a new head, unless you get a reconditioned one like i did) then you want a new piston and rings but before all this you need to flush all those little metal bits in the bottom end, this is vital if you dont get all the bits out one of them will cum up and score the barrel again and all you time and work is down the drain, the best way to do it i say is put your engine on clamp (with the topend off) so it cant move anywhere and get some premix (better too use a richer mix than ur usual at first) pour some into the bottom end and keep pulling the kickstart up and down after you've spinned the engine about ten or twelve times, if anything cums to the top be sure you get all of it out then tip the fuel back out and do it again until nothing cums out and if there are any scraping or noises that dont sound to good dont bother puttting the topend back on because there is an 8/10 chance if its making a dodgie noie when the crank is turning the are bits of metal stuck in the bearing and the only way of getting it out is either starting it which it will run for about ten minuites then do the exact same thing again or spliting the engine and checking the crank and it is probs worth renewing the crank too [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
seized engine ?
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