cb125t 1982 ignition timing help

webhead · Renault 5 Driver Joined: 22 Mar 2008 Karma :

hello just got me a cb125t 1982 i thought id buy 1 and doit up for sumit to do already its driving me crazy.

the engine sort of backfires sometimes but thats it i have good spark good compression good fuel.

so im thinking maybe ignition timing as it looks like somebody has been in the points cover lately as screws where loose ,

anyway on the points plate there is a line does this have to alighn up with line on casing, also says left and right,bith points look good,

is it possible that somebody put points cam on wrong way round making it totaly wrong?

well if anyone has an idea please help, as i havent a manual yet its on its way might help lol might not.

spyuggy · Nitrous Nuisance Joined: 29 Aug 2011 Karma :

The marks do line up with the casing, left is no.1 cylinder right is no2 cylinder.
Put the left piston to TDC and line up the two marks, then line up the right hand piston and line up the other marks and you should be running. Take your time doing this.
Good luck mate.
____________________
Treat each day as if it was your last, because one day you will be right.

webhead · Renault 5 Driver Joined: 22 Mar 2008 Karma :

hi cheers dude does run but carbs are now flooding they need setting up ,but ill have to wait for a book as dont know any of these keihin settings many thanks.

The Shaggy D.A. · Super Spammer Joined: 12 Sep 2008 Karma :

webhead · Renault 5 Driver Joined: 22 Mar 2008 Karma :

lol nice 1 shaggy your like a stalker ,funny you should mention cz,

ill give u a link to my youtube of the cz soon its getting cold and they like the cold.

time to get the helmet cam out.

but first im trying to get this crap cb125t to run driving me crazy.

The Shaggy D.A. · Super Spammer Joined: 12 Sep 2008 Karma :

Well, miracles may yet happen, as Duke Nukem Forever was finally released too.

Helmet cam won't do though, it needs to be a true 100mph verified by an independent 3rd party. Not "My mate Daz following in his Corsa".
____________________
Chances are quite high you are not in my Monkeysphere, and I don't care about you. Don't take it personally.
Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5

Fizzer Thou · World Chat Champion Joined: 06 Aug 2011 Karma :

I had a problem with my CB550 a few years ago.The engine would not run.The points gap was correct but it just would not run.In the end I installed some new OEM points onto the backplate.The bike started and ran better than ever before.

Effectively,the teflon heel on the points had worn.Just how it affected the operation was strange as when I reinstalled the worn points and gapped them it would not allow the engine to run properly.Once the newer points were reinstalled it ran like a dream.

So,my thoughts are,would it be worth trying a new set of points if all else has failed.

Also,measure the resistance of the plug caps.If they are a LOT more than between 5-10 thousand ohms then they should be replaced.
____________________
Just talk bikes.What else is there?

Always have a 'Plan B'