Now the crank and rod assembly is ready to be put into the cases. The plastic caps are to prevent the cylinder walls from being scratched during this part of the assembly process.
Next, the ring end gaps are set. This tool is used to push the compression rings a consistent distance into each bore.
Next feeler gauges are used to measure the gap. IAG uses oversized rings and handsets the gaps for each bore. This gives the best seal.
All of the compression rings are put in place and measured.
This tool helps to precisely grind the ring end gaps to the perfect dimensions.
The ring is held by a fixture and the ends can be ground with a small wheel. After grinding the ends are lightly stoned to remove any burrs.