Crank work..Worth the money?
HDF Community Team
Joined: Jun 2006
Posts: 12,779
Likes: 2,609
From: san antonio
These diagrams illustrate flywheels/crank in balanced and imbalanced condition.
More information is available at the Darkhorse website; go to the "No Spin Zone"
As to the OPs question, headwork which means more compression, TMan's 590 cams and larger throttle body will put TQ/HP in the 115 rang and, if it were me, I would be spending the $1000 or thereabouts to protect the upgrade investment. I would also say that if going that far, I would also case bore for a set of H-D 4.060" cylinders/pistons and increase displacement to 113"; not that much more $$ to do it now. I would not do the Timken conversion; the "Lefty" roller bearing has been holding up pretty well.
More information is available at the Darkhorse website; go to the "No Spin Zone"
As to the OPs question, headwork which means more compression, TMan's 590 cams and larger throttle body will put TQ/HP in the 115 rang and, if it were me, I would be spending the $1000 or thereabouts to protect the upgrade investment. I would also say that if going that far, I would also case bore for a set of H-D 4.060" cylinders/pistons and increase displacement to 113"; not that much more $$ to do it now. I would not do the Timken conversion; the "Lefty" roller bearing has been holding up pretty well.
Thread Starter
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Road Master
Joined: May 2008
Posts: 762
Likes: 14
From: Bellevue, NE
Thanks, guys, for your input. I've been e-mailing John at Darkhorse, and it looks like we're gonna go the whole enchilada, crank, bearing, and rods. Again, I appreciate the folks who took the time to respond. Ride safe.
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Road Master
Joined: May 2008
Posts: 762
Likes: 14
From: Bellevue, NE
Time delay, yeah, I thought about that, and in all honesty, the motor would most likely have been fine as long as I didn't kick her too hard. But the wife and I are planning some longer trips, and I also thought about how much down time and hassle we'd have to go through if the bottom end did let go. If I wasn't doing the heads, cams and throttle body, I probably wouldn't have done the work either.
Road Captain
Joined: Aug 2010
Posts: 511
Likes: 14
For those wanting more info with pictures there is a very good video here. Actually a bunch of good videos.
http://www.youtube.com/user/RevolutionPerform
I don't know anything about these guys, but he explains it in terms I can understand.
http://www.youtube.com/user/RevolutionPerform
I don't know anything about these guys, but he explains it in terms I can understand.
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Joe Kucinski
Unofficial HDF Chaplain
Joined: Dec 2009
Posts: 21,160
Likes: 18,083
From: san diego
good move!!
Road Master
Joined: Jun 2010
Posts: 757
Likes: 4
Yeah I know but I'm already 4 weeks without a bike since I sent my heads out, which is longer than anticipated. Ain't no way I'm waiting longer. I guess I'll take my chances and maybe make the crank next winters project.