Where is the timing mark on a 2 stroke ignition?
After locating TDC, the mechanic should rotate the flywheel backward (typically around 2.0-mm vertically of the piston) until marks on the flywheel align, this is the timing mark and the point at which the contact points should begin to open.
How many spare parts are in a Yamaha yfm200n?
Yamaha YFM200N 1985 MOTO-4 on-line schematics – your first port of call when repairing or restoring. Access nine hundred eighty-six spare parts listed in these schematics. The list contains forty-two Other parts fiches.
How often should you check ignition timing on a motorcycle?
The net effect of a worn contact point heel is that the ignition timing progressively slows. Checking the ignition timing on an early motorcycle is best done monthly if the bike is ridden daily (for example, if it’s used as a commuter bike).
Can a 2 stroke engine run at the wrong time?
If the timing is close to TDC (top-dead-center) it is possible to catch the piston just at the wrong time with the result that the engine runs backward. This problem can only happen on a 2-stroke because there are no valves to be operated in a set sequence, as in a 4-stroke engine.
How do you check the advance unit on a Yamaha motorcycle?
To check this you must use a timing light with the engine running OR with the engine off, physically turn, and jam in position, the advance unit. Then check it. Most of the Japanese engines I time in the retarded position except for the Yamaha 2-stroke singles. They seem to have weak advance springs, making timing in the retarded position iffy.
How do you change the timing chain on a transmoto?
As you pull the flywheel off, be sure to grab the woodruff key (a semi-circular metal disc that locks the two components together) from the groove on the crankshaft. Then, remove the large starter motor gear on the crankshaft to reveal the timing chain. 8. Remove The Timing Chain Guide
After locating TDC, the mechanic should rotate the flywheel backward (typically around 2.0-mm vertically of the piston) until marks on the flywheel align, this is the timing mark and the point at which the contact points should begin to open.
Do you remove timing chain slider when replacing piston?
Timing Chain Slider. While there’s no need to remove the front slider when replacing the timing chain, you do when you pull the head off to replace a piston. The trick then becomes getting the slider to seat correctly when reinstalling it.
How do you find the correct ignition timing?
To find the correct timing position, the mechanic should rotate the flywheel in the normal direction of travel when the engine is running. To find the direction of travel, the mechanic can use the kick-starter, or by rotating the rear wheel with the bike in gear.
Can a flywheel extractor be used to set ignition timing?
With the points open at their widest, the mechanic should set the required gap. However, if the points are badly pitted the mechanic should replace the points; a flywheel extractor will be required for this job. With the contact points’ gap set, the mechanic can turn his attention to the ignition timing.
How do you set ignition on a car?
To begin the ignition setting sequence, the mechanic should remove the spark plug as this will make it easier to turn the engine over for piston positioning. Next, the crankshaft must be rotated to give the largest opening of the contact points — typically around TDC. With the points open at their widest, the mechanic should set the required gap.