There is a lot of information on the website, but resizing the piston/sleeve is done when compression is low and weak casuing the engine to run poorly or not at all. basically resizing means re-forming the sleeve to have like new seal and compression again, which in turn will eliminate it running poorly from loss of compression.


FIlling the crank can be done to a crankshaft that previously had filler from the factory which has deteriorated and fell out. Or on engines that never had the crankshaft filled as a performance improvement. Most cranks that did not come from htefactory filled will need to be drilled out first before they can be filled with the special silicone filler. This reduces weight and allows the adjustment of crankcase volume as well to allow a quicker revving engine.


Thanks,
Lance
RcRenew