Went on the 2-stroke rally yesterday at Sherburn-in-Elmett, Yorks.... there was loads of strokers there including another NSR (a very nice MC28) and my MC21... I'd been looking forward to this event all year and my NSR has been running very well..... About a mile into the ride and it started missfiring at about 8k revs, gradually got worse untiI had to stop and come back..by the time i got home (another 8 miles) it was running on one cylinder, phutt phutting, backfiring and would only run on 2 cyl's at 7k revs, above or below that speed it went onto one cyl'...! I've no idea what the problem is at the moment so I'm going to have a look today. Any advice or suggestions would be appreciated. Cheers. Rob.
PS I went out and re-joined the rideout on my aircooled RD250F so not a total loss....took a bit of stick from the other guys about Honda reliability though ..
Quick update..... only had time for a quick look this afternoon, I fired her up and she ran ok for a min or two, then dropped onto one cyl again..... so I started by taking the plugs out (quite awkward to get at the rear one.... ) the running cyl plug looked ok, the non-runner was black and oily... anyway i cleaned them both and switched them..... ran it again for a few mins and seemed ok.... Some of my 2 stroke buddies who run RGV's TZR's etc seemed to think that the problem could well be sparkplug related, i was a bit dubious that it would be so simple but maybe i'm going to be lucky.... I'll order some new plugs in any case....
nobby62 wrote:there was loads of strokers there including another NSR (a very nice MC28) and my MC21...
that'll be mine then! Been away from the bikes for a while but glad I dragged the 28 out for a blast! Had a great time! Hope you've sorted your problem buddy!
Hi nobby sorry to here about your problem, i was hoping to get there on my 21 but had to go on my holls,
i had a similar problem with a 350lc that turned out to be the plugs so you maybe lucky hope all goes well and cheapish for you
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) the running cyl plug looked ok, the non-runner was black and oily... anyway i cleaned them both and switched them..... ran it again for a few mins and seemed ok.... Some of my 2 stroke buddies who run RGV's TZR's etc seemed to think that the problem could well be sparkplug related, i was a bit dubious that it would be so simple but maybe i'm going to be lucky.... I'll order some new plugs in any case....
Been away from the bikes for a while but glad I dragged the 28 out for a blast! Had a great time! Hope you've sorted your problem buddy!
