pago cruiser
XS650 Addict
I've soon to be in the market for a 750cc big cylinder kit from MikesXS - I think. Mikes has been out of stock for awhile, and Heiden Tuning as well. I don't know, but I assume that Mikes and Heiden use the same source? When I compared a few months ago, at least the pics were the same.
I called another vendor, and he indicated that the piston skirt height in Mikes 750 kit has been shortened. I know it would be lighter, and in performance engines, lighter pistons is a goal. But this is not really a performance engine, and a piston lightened with shorter skirts may have more inclination of piston rocking, at least when compared to a stock piston skirt. I did see that Mikes ad indicates that the skirts are "Mos2" treated. If the skirts were indeed shortened, AND rocking is a concern, (and I do NOT know), I don't know how a coating could compensate. Anti friction, yes. Anti rocking, I dunno.
Interestingly enough, Heiden's indicates that a "new design" for a 447 crank 750 kit is "comming (sic) soon". This has been on their site unchanged for the last month. But they do NOT list 9:1 pistons, only 10:1. But Mikes still shows 9:1. I live in Tucson, would prefer the 9:1 for longevity.
If I needed it right now (thankfully, I don't), the only way would be to buy Mikes Big Cylinder kit, then buy a 9.2:1 750 kit from 650 Central. This would also cost a bit more, as Mikes 750 kit is $700, while the 650 Big Cylinder is $380, and the 750 kit from 650 Central (Wiseco pistons) is $550, PLUS the sleeve installation and boring at $350, totaling $1280. Ouch!
Anybody happen to have a Mikes piston and a Wiseco piston (or a stock XS) BOTH in your garage/shop to compare?
TIA.
I called another vendor, and he indicated that the piston skirt height in Mikes 750 kit has been shortened. I know it would be lighter, and in performance engines, lighter pistons is a goal. But this is not really a performance engine, and a piston lightened with shorter skirts may have more inclination of piston rocking, at least when compared to a stock piston skirt. I did see that Mikes ad indicates that the skirts are "Mos2" treated. If the skirts were indeed shortened, AND rocking is a concern, (and I do NOT know), I don't know how a coating could compensate. Anti friction, yes. Anti rocking, I dunno.
Interestingly enough, Heiden's indicates that a "new design" for a 447 crank 750 kit is "comming (sic) soon". This has been on their site unchanged for the last month. But they do NOT list 9:1 pistons, only 10:1. But Mikes still shows 9:1. I live in Tucson, would prefer the 9:1 for longevity.
If I needed it right now (thankfully, I don't), the only way would be to buy Mikes Big Cylinder kit, then buy a 9.2:1 750 kit from 650 Central. This would also cost a bit more, as Mikes 750 kit is $700, while the 650 Big Cylinder is $380, and the 750 kit from 650 Central (Wiseco pistons) is $550, PLUS the sleeve installation and boring at $350, totaling $1280. Ouch!
Anybody happen to have a Mikes piston and a Wiseco piston (or a stock XS) BOTH in your garage/shop to compare?
TIA.
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