Has anyone here put the Ferracci 13:1 piston in their 610? Due to unavailability of stock parts for a top-end rebuild I'm now concidering an aftermarket piston and would like some real world feedback. Thanks __________________
I think that the fear of wrist pin damage on the Ferracci piston might be a bit overstated. I have no real experience with them myself but Ferracci fields some pretty competitive bikes and if wrist pin failure was a common issue I would think that they would take measures to assure that it didn't happen. I have also heard that there might be some concern about starter being able to spin against the higher compression but I know of a couple of installs and they say that once the auto decompress is set and a good battery that there doesn't seem to any real issue. Sorry Goosedog, I wish I had some real personal experience to relay.
i have one installed on my 08 sm610......it starts and sounds fine but the mapping appears to way off now.....waiting for the husky software to diagnose it......may end up having to get a pc........hopefully have more info soon
finally got around to getting my SM610 over to Bill's in Salem to get the mapping adjusted on his Ibeat2.......the 13 to 1 fast by Feracci and a multi-angle valve job were done about a month ago ..... first off, let me say it makes a big difference when you get the cam timing set correctly......lol......after that, it ran much better when more fuel (richer 10-12%) was dialed in across the board. once running normal, i took it out for about 20 miles to evaluate. Its definitely stronger in all RPM ranges.....not a huge amount, but definitely snappier.....it revs faster (the OEM piston was actually a few grams lighter)......seems to run fine on premium.....unless something breaks down the line, its a nice improvement..... im wondering how much more i could get with a full header and PC-V..........
