Hi
I have an 86 ns250r which has been a project for a while, i have just replaced the carbs, one coil and the spark plugs. it ran fine for a couple days and then tonight only stated on 1 cyl, i left it while i was putting gear on and it started the 2nd fairly quickly. took it for a ride and it was very sluggish, like it had no power band at all. then when i was going from 2nd to 3rd it stalled. so i clutched in and tried to start it in 1st when i got a bit slower which worked fine. then a bit later at an intersection it did it and then it wouldn't start with the kick until i opened the throttle and gave it a few kicks (i guessed it was flooded). it went sluggish like it was before, then when i was almost home it did it again and i tried starting it like i did before and it wouldn't, it locked the back wheel. when i tried to kick it over the kick wouldn't go down like the engine was seized, i got off and wheeled it a bit then tried again and the kick was back to normal, and it started after a few kicks. when i got it home i thought maybe the idle had dropped low for some reason so i turned it up a bit and it jumped form about 1700rpm up to over 3.5k and wouldn't sit any where in between, it was also fluctuating at idle. the temp was quite high (not in the red or anything just a bit above the middle of the gauge). since i got it running a few days ago it hasn't really sounded in tune, but i cant afford to have someone do a good job of it. so was just putting it off until i can. the spark plugs i have a 7's so they are quite cold, i did this because the 9's were not starting the bottom cyl but some 6's i had lying around would. (don't know why)
I have tried not to leave anything out but i may have.
any help would be great because this one has me stumped the symptoms point to different things in my head. i will let you know if it seizes overnight.
oh and i took the front plug out and it looked very warn for having only done 100km it was brownish on the top no oil or anything though. normally i wouldn't think anything of it except that its only 3 days old.
just ask if there is anything i could check to help
thanks in advance