evening all, took my 1999 ssdt graham javis 250 out the other night, what started off as a bit of top end rattle at mid revs or under load ended the evening as a siezed solid motor that i had to push about a mile to get it home.

however when i stood on the kick this morning to demonstate to my brother how solid it was it kicked over as normal. so i thought id try and start her up, choke open first kick she fired up and sounded pretty sweet, i only let her run a couple of seconds and then switched off.

as a bit of a novice im not really sure whats going on here so the thing i want to know is what to do next? any suggestions or comments would be greatly appreciated. thanks.

Whip the pipe off and have a look through the exhaust port for marks on the bore. May then need to take the head off to investigate further. The rest you probably can guess - new piston and recoat barrel if it is badly damaged. It's surprising how badly damaged it can be and run quite well. I think the first owner of my bike must have fed it sand for tea. Though it ran really well I eventually got fed up with the rattle and had a look inside - I'd never seen the like.

Edited August 17, 200818 yr by 2/4