Join Date: 02-17-2007
Location: Calgary, Alberta, Canada
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 14
Re: stock pistons or aftermarket
I would guess that the difference between and aftermarket piston and a stock piston would be negligible. The higher compression will get you a slight increase in power, but you probably wouldn't actually feel it. Are you going to get the cylinders honed or bored out? If you are going for just a hone, then you can just use stock pistons and rings, and I wouldn't spend the extra cash on the aftermarket pistons. If you are going to bore the cylinders, then you are going to need to buy an over sized piston anyways, so then I would go for after market, and go for an over bore kit, in which you would increase your cc's by about 50cc's or more.
As for used vs. new, that is a gamble. I bought used JE over bore pistons on ebay for my 93 900RR. When I got them, they were in good shape except for one very small nick on the skirt on one piston. The first place I took the block and pistons to to get the block bored out wouldn't do it. He said that small nick could cause a failure under the high loads experienced in the engine. The second guy I took it to was a drag racer, had competed at Bonneville, and had been in the business for 30+ years, said it was no problem. 10000km later, and no problems (knock on wood). It is a risk though, and I knew that, but considering the price on the kit, I thought it was worth it. In the end, I still had to buy new rings and wrist pin clips from JE, so I didn't save that much over a new complete kit.