Question about 1972 Honda CB 250
Hi, I have just bought a 1975 Honda Cb360T I have worked on the bike all winter to get it started the parts were all over the place, but I got it all together. Now the only problem is there is no spark to the spark plugs, I looked around and found a POINTS / ADVANCER cover I took off the cover and there was 2 contact points, one for the left, and one for the right, I played with it and it seems as it has to move in a right to left motion or vis versa, when this is done it creats a spark and sends it to the spark plug. My question is how do they move from the right to left motion when i try to start my bike. Also how would you do adjust this and what would you use?? here is a picture of it
I worked on a bunch of these bikes back when they were new and I was working at Mathews Honda in D.M. Iowa. Bear in mind that was 30 years ago. IF I recall correctly. . . . .
First, the points only open and close. Other than that they don't move. The points are adjusted for gap by being moved L and R then locking down in place with a screw.
Assuming you have a good set of points, set the point gaps to 15 thousandths. The timing is set by rotating the base plate the points are mounted on. Behind the plate is a centrifical advance. Get an inductive pickup timing light and hook it up to the battery. Hook the pick up on the left sparkplug wire.
Start the motor and point the light at the top of the gearbox flywheel. Yes, with the cover removed some oil will spit out. This is normal. Rev the bike and you will see the timing marks. You will also see a static timing mark on the casing. Rotate the points base plate to line up the marks. When you let off the gas the flywheel marks should move counter clockwise. If they don't, then remove the points cover and free up the centrifical advance mechanism. You just timed the engine.
The photo will not open in "FixYa". Email it to me at [email protected]. Would you like to know how to synchronize and balance the carbs?
Include your phone number in the email.
Posted on Mar 29, 2009
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