It is not necessary to use special timing tools for Jiangnan Alto timing marks. The specific operation steps for Jiangnan Alto timing are as follows:
1. Install the timing chain and align the timing marks. The lower part of the chain hangs on the crankshaft gear.
2. Hang the upper part of the timing chain on the two camshaft gears.
3. Install the guide wheel groove of the timing chain.
4. Align the mark on the crankshaft gear with the black link of the timing chain.
5. Align the gap on the camshaft with the black link of the timing chain.
(Operation completed)