hi

i was riding my mc21 only a few miles from home when she cut out grabbed the clutch pulled over, didn't nip up so tryed the horn to see if it was the battery it was totaly died so ok the rectifier has gone no problem got it back home charge the battery, got lights every thing works but i don't have a spark on both . i have 400s and the rectifier goes pop some times on them but you can still start the bike up and then check the volts when running to make shore. what do you think it might be i've tryed new plugs checked all the connector and WD as i go along arrrrrrhhhhhhhhh this bike don't like me

if you have any ideas i could use them alot please thanks marcus

Try this topic, it was only a few lines down.

http://www.nsr250.net/forums/viewtopic.php?t=13229

Ok sorry didn't see that yup same thing as mine and the same things give or take that I've checked looked at the flywheel pick ups I may take it off and check the Magneto as the copper wire can brake down

Hello Marcus
Whats up dude did my post help you ?
Do you find it Helpful?
I still cant get a spark on both i hope one day to see the spark jumpin around the spark plugs and then to ride the beast.

Guys

Thesee bikes are all very old but the main components don't usually fail. Older electronics were quite robust, however the push connectors and insulation on individual wires can corrode or perish quite badly in 20 years. I would make the assumption that the components are ok and the problem is somewhere in the wiring loom itself. I had the same problem and it was caused by a corroded block connector causing the loom to earth out.

Hope this helps

Did you ever bottom the no spark issue.

I have exactly the same problem and saw your post whilst trawling the site.

If you sorted it what was the answer for you.

I'm pulling my hair out too!

Just purchased a MC21 with a Electrical problem....found the Pulse generator had gone bad. Previous owner was stumped...Get yourself an ohm meter & just follow the checklist Honda provides. It took me about 20 minutes to find the problem. Good luck