Piston upgrade for a 103"?
HDF Community Team
Joined: Jun 2006
Posts: 12,774
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From: san antonio
Are you guys sure the SE 110" bolt in kit wouldn't be the better way to go?
...just joking
Any suggestions on the 'best' forged 10.5:1 piston for a 107" build? Axtell, MTC, Wiseco?
Anybody have any feedback on having used the IC FuelMoto jugs as opposed to having my own re-worked?
...just joking
Any suggestions on the 'best' forged 10.5:1 piston for a 107" build? Axtell, MTC, Wiseco?
Anybody have any feedback on having used the IC FuelMoto jugs as opposed to having my own re-worked?
Bore your cylinders to fit whatever pistons you buy; you will know bore is true and fitment is correct. Even if you buy new cylinders, you would buy with bore undersize for boring to fit the pistons. Don't take a chance on buying cylinders and pistons assuming cylinder bore is true and pistons will fit the bore properly.
Actually, the 110 drop in kit is not a bad idea but an aftermarket cam; the 777s would not be a good fit.
EDIT: An OEM TC88 piston assembly (piston/pin/rings/clips) weighs 593.5g; an OEM TC96/103 piston will weigh about the same. As a point of reference; an MTC 4.125" piston assembly weighs 548g; a CP 4.125" piston weights 575g; a CP 4.060" piston weighs 543g; a JE 4.125" piston weighs 656g. The referenced piston weights include a .180" wall pin; add about 45g for a .230" wall pin. I rebuilt an all bore 107" motor with a set of MTC 4.125" pistons and hung them on a crank that had been balanced by Darkhorse to the weight of a JE piston without thinking about the reciprocating weight. The vibration that occurred between 1800-2400rpms and from 2400-1800rpms made the bike unrideable. It finally dawned on me that the difference in piston weight was causing the vibration. I replaced the MTC pistons with a set of JE pistons and the vibration went away; lesson learned. Now I am very careful about selecting pistons for a rebuild.
Last edited by djl; Feb 23, 2016 at 09:54 AM.
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Are you guys sure the SE 110" bolt in kit wouldn't be the better way to go?
...just joking
Any suggestions on the 'best' forged 10.5:1 piston for a 107" build? Axtell, MTC, Wiseco?
Anybody have any feedback on having used the IC FuelMoto jugs as opposed to having my own re-worked?
...just joking
Any suggestions on the 'best' forged 10.5:1 piston for a 107" build? Axtell, MTC, Wiseco?
Anybody have any feedback on having used the IC FuelMoto jugs as opposed to having my own re-worked?
One of the very first shops in the country to bore the OE cylinder to that dimension, before some outfits were even in business.........
At $600.00 for the entire job with the rings gapped/installed on the pistons, and a COMPLETE Cometic engine gasket set.........clearly one of the best values out there.
Scott
Last edited by Hillsidecycle.com; Feb 26, 2016 at 07:25 AM.
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Joined: Mar 2010
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From: Poolville
We have been boring the OE cylinder to 3.937" since 2006 with our 88-98" kits, and in 2007, we contacted the Engineering Dept, at Wiseco Piston, Mentor, Ohio, and then were boring 96-107" using our proprietarty Wiseco/Cometic piston/gasket kits.
One of the very first shops in the country to bore the OE cylinder to that dimension, before some outfits were even in business.........
At $600.00 for the entire job with the rings gapped/installed on the pistons, and a COMPLETE Cometic engine gasket set.........clearly one of the best values out there.
Scott
One of the very first shops in the country to bore the OE cylinder to that dimension, before some outfits were even in business.........
At $600.00 for the entire job with the rings gapped/installed on the pistons, and a COMPLETE Cometic engine gasket set.........clearly one of the best values out there.
Scott
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Joined: Sep 2009
Posts: 3,569
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From: deland,florida
Are you guys sure the SE 110" bolt in kit wouldn't be the better way to go?
...just joking
Any suggestions on the 'best' forged 10.5:1 piston for a 107" build? Axtell, MTC, Wiseco?
Anybody have any feedback on having used the IC FuelMoto jugs as opposed to having my own re-worked?
...just joking
Any suggestions on the 'best' forged 10.5:1 piston for a 107" build? Axtell, MTC, Wiseco?
Anybody have any feedback on having used the IC FuelMoto jugs as opposed to having my own re-worked?
Ide wait a while before ide trust the new 110 kit.107" kits have been tried & true for years.we like CP pistons for 98" & 107" builds
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Good price no doubt.
We've been holding that pricing since the conception, but we will need to bump that up soon, as material costs have risen in the past 9-10 years.
Scott
Outstanding HDF Member
Joined: Jan 2014
Posts: 2,482
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From: Minnesota
We have been boring the OE cylinder to 3.937" since 2006 with our 88-98" kits, and in 2007, we contacted the Engineering Dept, at Wiseco Piston, Mentor, Ohio, and then were boring 96-107" using our proprietarty Wiseco/Cometic piston/gasket kits.
One of the very first shops in the country to bore the OE cylinder to that dimension, before some outfits were even in business.........
At $600.00 for the entire job with the rings gapped/installed on the pistons, and a COMPLETE Cometic engine gasket set.........clearly one of the best values out there.
Scott
One of the very first shops in the country to bore the OE cylinder to that dimension, before some outfits were even in business.........
At $600.00 for the entire job with the rings gapped/installed on the pistons, and a COMPLETE Cometic engine gasket set.........clearly one of the best values out there.
Scott
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