Author Topic: Revolution Performance 85" evo kit experience?  (Read 1607 times)

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Offline codyshop

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Revolution Performance 85" evo kit experience?
« on: October 18, 2017, 06:48:29 PM »
The old Fatboy is in need of a top-end job and I'm kicking around a few ideas.  One, rebore the existing cylinders with oversized Wiseco flat tops, Sifton 83" kit with Wiseco flattops that still uses an iron liner or the Rev. Performance 85" kit with Wiseco flat tops that has no iron liner...just a nickel-silicon coating on the aluminum bore.  Experiences?  I know BMW and others have been using the nikasils for decades but they have much shorter strokes.  Thanks

Offline thumper 823

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Re: Revolution Performance 85" evo kit experience?
« Reply #1 on: October 18, 2017, 07:18:04 PM »
Just say AXTELL.
Buy their cast iron units with the 10.5 pistons .
These will not walk around and leak like aluminium will.
Have them reshape your combustion chambers.
0.030 head gaskt.
Dial in 0.030 squish.
Double plug with Daytona twin tech.
Do a blended valve job .
Blended guides.
DM 530 Cam or equivalent.
I  can say 20K miles later This works!
Reliable and flat screams-  heavy, fast, whatever you like.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline rigidthumper

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Re: Revolution Performance 85" evo kit experience?
« Reply #2 on: October 18, 2017, 08:12:35 PM »
Ray, I wouldn't spend all that $ for a product that isn't popular/widely used?
Better off with boring your stuff .010" over ( or whatever is needed) and spending the extra coin on a new cam & headwork.
Properly bored, seasoned cylinders work well for a long time.  I'm a huge fan of Doug Coffee's system 85 kit.

Offline prodrag1320

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Re: Revolution Performance 85" evo kit experience?
« Reply #3 on: October 19, 2017, 04:22:35 AM »
we do 85" kits using your cylinders,ide stay away from the rev perf nikasil stuff

Offline Scott P

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Re: Revolution Performance 85" evo kit experience?
« Reply #4 on: October 19, 2017, 04:26:55 AM »
Round/straight bores, say +.020", Wood 8 cam, 42 Mik, or S&S E with a T/jet, 10.75 cr, Thunderheader, Supertrapp 2/1 or even S/E slip-ons, get the heads re-worked, and a Dyna 2000i......let-r-rip.
90/90 with ease.
Otto Knowbetter sez, "Even a fish wouldn't get caught if he kept his mouth shut"

Offline 92flhtcu

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Re: Revolution Performance 85" evo kit experience?
« Reply #5 on: October 19, 2017, 05:49:55 AM »
As someone that reps in the industry in Wisconsin, I see a lot of Rev Perf/ Millenial issues in this neck of the woods. i'm not bashing, just observing what I see. they had issues with their early nikasil stuff. I also see some success with some of their stuff as well, but not any nikasil
Need a bigger garage

Offline PoorUB

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Re: Revolution Performance 85" evo kit experience?
« Reply #6 on: October 19, 2017, 03:25:13 PM »
Not that it matters but many of the imports run a high silicon aluminum alloy engine block, not nikasil. There is also a process to apply a high silicon aluminum alloy coating to cylinder walls. I don't believe nikasil is as widely used as many think.
I am an adult?? When did that happen, and how do I make it stop?!

Offline wfolarry

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Re: Revolution Performance 85" evo kit experience?
« Reply #7 on: October 20, 2017, 11:30:48 AM »
Not that it matters but many of the imports run a high silicon aluminum alloy engine block, not nikasil. There is also a process to apply a high silicon aluminum alloy coating to cylinder walls. I don't believe nikasil is as widely used as many think.

Chevy tried that with the Vega back in the 70ís. Look what happened with that.
Just because something works in one application doesnít mean it will work in all.
Look at what Ford did with their new Coyote motor. Havenít heard anything bad about that. I thoug that process would trickle down to the Motorcycle market.

Offline PoorUB

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Re: Revolution Performance 85" evo kit experience?
« Reply #8 on: October 20, 2017, 05:39:23 PM »
Not that it matters but many of the imports run a high silicon aluminum alloy engine block, not nikasil. There is also a process to apply a high silicon aluminum alloy coating to cylinder walls. I don't believe nikasil is as widely used as many think.

Chevy tried that with the Vega back in the 70ís. Look what happened with that.
Just because something works in one application doesnít mean it will work in all.
Look at what Ford did with their new Coyote motor. Havenít heard anything bad about that. I thoug that process would trickle down to the Motorcycle market.

My 2003 Yamaha R1 is a high silicon alloy block. I bought it with a blown rod, but the eBay engine that is in it now doesn't burn a drop of oil, not sure how many miles are on that engine, but i put 5,000 or more on it.

Pretty sure some of the newer BMW car engine are high silicon alloy too. I wonder how they made it work and other did not. Perhaps Chevy was before it's time and the engineering just was not up to speed.
I am an adult?? When did that happen, and how do I make it stop?!

Offline aswracing

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Re: Revolution Performance 85" evo kit experience?
« Reply #9 on: October 21, 2017, 06:04:41 AM »
The old Fatboy is in need of a top-end job and I'm kicking around a few ideas.  One, rebore the existing cylinders with oversized Wiseco flat tops, Sifton 83" kit with Wiseco flattops that still uses an iron liner or the Rev. Performance 85" kit with Wiseco flat tops that has no iron liner...just a nickel-silicon coating on the aluminum bore.  Experiences?  I know BMW and others have been using the nikasils for decades but they have much shorter strokes.  Thanks

My experience with them has been bad. And not just the plating issues they're known for. Specifically, the Evo Big Twin versions caused studs to pull out of the cases. Something about the way the cylinder was twisting and distorting as it grew with heat was causing it. Replaced it with an Axtell kit and the problem was solved. The Axtell cast iron cylinder is a rock solid piece that adds stability and strength to the whole engine assembly and maintains great ring seal as a result.

Listen to the people on this thread. They have experience. Just because nikasil works in one application, for which the motor was engineered for it, does not mean it works in another application in which it's been dropped into an existing design. Save yourself a lot of grief and get the Axtell kit or bore your stock cylinders.

Offline thumper 823

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Re: Revolution Performance 85" evo kit experience?
« Reply #10 on: October 21, 2017, 06:23:18 AM »
Porsche aircooled engines used Niky forever in their  cars.
No problems even in turbo aplications, with lots of boost .
I will just have to guess its a matter of manufacturing process.

D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline 1FSTRK

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Re: Revolution Performance 85" evo kit experience?
« Reply #11 on: October 25, 2017, 04:49:12 AM »
 Nikasil and other plated cylinder coatings depend on a stable cylinder design to support the coating. The harley cylinder depends on a thick cast iron or stronger steel liner to provide it's stability. If you over bore, or remove the liner from the Harley cylinder design before plating you now have neither a stable cylinder nor a stable liner.
"Never hang on to a mistake just because you spent time or money making it."

Offline turboprop

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Re: Revolution Performance 85" evo kit experience?
« Reply #12 on: October 25, 2017, 05:39:37 PM »
Good grief. RevPerf and their nikasil cylinders have been discussed extensively countless times on this forum. The subject should have its own section. I bet a simple search on this page will turn up many previous discussions. Would be great if the Admins here could simply lock new conversations and redirect to existing threads. At least that way everything would be in one spot.
'Never try to teach a pig to sing, it only wastes your time and annoys the pig'.

Offline codyshop

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Re: Revolution Performance 85" evo kit experience?
« Reply #13 on: October 27, 2017, 09:55:32 PM »
Good grief. RevPerf and their nikasil cylinders have been discussed extensively countless times on this forum. The subject should have its own section. I bet a simple search on this page will turn up many previous discussions. Would be great if the Admins here could simply lock new conversations and redirect to existing threads. At least that way everything would be in one spot.

I did.  Two hits and none in "EVO 1340."

Offline turboprop

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Re: Revolution Performance 85" evo kit experience?
« Reply #14 on: October 28, 2017, 06:22:34 AM »
Good grief. RevPerf and their nikasil cylinders have been discussed extensively countless times on this forum. The subject should have its own section. I bet a simple search on this page will turn up many previous discussions. Would be great if the Admins here could simply lock new conversations and redirect to existing threads. At least that way everything would be in one spot.

I did.  Two hits and none in "EVO 1340."

Go to the home page, search nikasil, there are five pages of hits. The 85" is not a big enough discriminator. Its all the same stuff.
'Never try to teach a pig to sing, it only wastes your time and annoys the pig'.

Offline thumper 823

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Re: Revolution Performance 85" evo kit experience?
« Reply #15 on: October 28, 2017, 07:07:59 AM »
I will shorten it up for ya-
Nothing wrong with nikies.
However, there can be everything wrong with the vendor that sells it to you.
CHOOSE a business that KNOWS how !
I have used EBS B4 , no problems .
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline barrybasinger

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Re: Revolution Performance 85" evo kit experience?
« Reply #16 on: December 14, 2017, 07:52:29 AM »
... Specifically, the Evo Big Twin versions caused studs to pull out of the cases. Something about the way the cylinder was twisting and distorting as it grew with heat was causing it...   
Thank you very much for that tidbit. We've had two instances of studs pulling (one on a brand new set of S&S cases) in the last year or so. Fixed 'em, but never thought that the jugs could be the source of the problem. Now I'm curious. Will have to check and see if we still have any info on those bikes.

Offline JW113

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Re: Revolution Performance 85" evo kit experience?
« Reply #17 on: December 20, 2017, 05:36:21 PM »
Hmm, I would have suspected it more to be the grade/strength of the aluminum alloy in those evo castings. Near as I can see, twin cams have essentially the same construction as an evo, i.e. cast aluminum case, four studs per cylinder, and aluminum cylinders with iron liner. So why do twin cams seldom pull studs?

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Offline rageglide

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Re: Revolution Performance 85" evo kit experience?
« Reply #18 on: December 20, 2017, 08:17:13 PM »
Like turboprop said, pretty well beat to death.  At least from a Twinkie perspective.  But I can't imagine an Evo is much different.  Both are fairly long cylinders that do a shimmy shake as they grow.  BMW air and oil heads have short cylinders, and probably same with the Porsche, so I'd guess they are much more stable.  All the sport bikes use high silicon alloy and are very stable thanks to water cooling.  So it's really not fair comparison.   Haven't heard anyone complaining about T-Man's nikasil cylinders so maybe he's got a better vendor.

Seems like an expensive and risky option if anything, with no overbore.  Screw it up and you're buying new.  Better to stick with tried and true.  IMO

Offline turboprop

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Re: Revolution Performance 85" evo kit experience?
« Reply #19 on: December 21, 2017, 07:47:29 AM »
Like turboprop said, pretty well beat to death.  At least from a Twinkie perspective.  But I can't imagine an Evo is much different.  Both are fairly long cylinders that do a shimmy shake as they grow.  BMW air and oil heads have short cylinders, and probably same with the Porsche, so I'd guess they are much more stable.  All the sport bikes use high silicon alloy and are very stable thanks to water cooling.  So it's really not fair comparison.   Haven't heard anyone complaining about T-Man's nikasil cylinders so maybe he's got a better vendor.

Seems like an expensive and risky option if anything, with no overbore.  Screw it up and you're buying new.  Better to stick with tried and true.  IMO


No such thing. He puts his name on RevPerf cylinders. Aside from RevPerf and thier parent company, I know of no other facility in the world that is making nikasil cylinders for the harley application.
'Never try to teach a pig to sing, it only wastes your time and annoys the pig'.

Offline Ironheadmike

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Re: Revolution Performance 85" evo kit experience?
« Reply #20 on: January 29, 2018, 03:46:45 AM »
It seems that all of the motors that you all are talking about  are liquid cooled . Could this be why the nik is not as good in an air cooled motor ?

Offline thumper 823

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Re: Revolution Performance 85" evo kit experience?
« Reply #21 on: January 29, 2018, 04:03:06 AM »
The old Porsche 911 engines NA and AA   used  Nikasil forever.
The turbos can be made to pump out way over 600 HP.
Again, its a matter of who does it.
 One has to start with a proper foundation B4 anything will stick to it.
I would call EBS racing and see if they still do them.

D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline Scott P

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Re: Revolution Performance 85" evo kit experience?
« Reply #22 on: January 29, 2018, 04:22:49 AM »
When in doubt, bore the cast iron out....
Otto Knowbetter sez, "Even a fish wouldn't get caught if he kept his mouth shut"

Offline kd

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Re: Revolution Performance 85" evo kit experience?
« Reply #23 on: January 29, 2018, 05:49:33 AM »
I guess you have to ask yourself if your looking for a challenge or something that works every time.   :scratch:
KD

Offline turboprop

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Re: Revolution Performance 85" evo kit experience?
« Reply #24 on: January 29, 2018, 07:05:56 AM »
And the circle of life continues. Good grief.
'Never try to teach a pig to sing, it only wastes your time and annoys the pig'.