Ultima 100 CI, Owner'S Manual

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Lifter Adjustment procedure for Ultima ® Engines
When performing any service work always disconnect the battery!!!
Remove the spark plugs and pushrod tube clips to access the pushrods. With a stable lift get the rear wheel of the bike off of the ground and put the
bike in 5th gear. Use the rear wheel to rotate the engine slowly.
Never rotate the engine with the Starter motor while adjusting pushrods.
1. Rotate the engine until you are on the compression stroke for the cylinder you are adjusting. This occurs after the cylinder to be adjusted has had
its Intake lifter go to full lift and back to Zero lift during forward rotation of the engine. At this time the piston will be coming up and both valves
will be closed at Top Dead Center. Put the piston at the very top of its stroke ( TDC). You can now adjust both pushrods for that cylinder.
2. Loosen both pushrods until there is play between the lifter and pushrod.
3. With your Fingers rotate the adjuster until there is no play between the lifter and pushrod (zero lash) but with no load on the lifter.
4. Extend the adjuster another 3 full turns beyond zero lash and lock the jam nut tight. (This applies to pushrods with 18 threads per inch. If the
pushrods are not the stock Ultima ® pushrods use the manufacturer’s recommended setting.)
5. Wait until you can turn both of the pushrods with your fingers (30 seconds to 15 minute wait). You can then roll the engine over and repeat the
process for the next cylinder. Do not roll the engine before you can turn the pushrods by hand or you can cause damage to the engine. The
engine should rotate and not want to stop at any point when adjusting pushrods. If the engine wants to stop at any point do not force the
rotation. Stop and reset that pushrod or you can cause damage to the engine.
6. Repeat this procedure for the remaining pushrod for that cylinder.
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