Crankshaft runout for '09

[rbabos]

Nope. 99% of it is in the crankpin shift where problems begin.
Ron

[claydbal]

Originally Posted by rbabos

Nope. 99% of it is in the crankpin shift where problems begin.
Ron

say it aint so. crankpin shift????? areyou crazy?/ search dynadad to explore my sarcasm

[Josey Wales]

It is just plain ridiculous!

Meanwhile....Saving my money to have Steve @ GMR fix the problem and build me a reliable motor!

[rbabos]

Originally Posted by claydbal

say it aint so. crankpin shift????? areyou crazy?/ search dynadad to explore my sarcasm

Well, my runout is bigger than yours
Seriously, this thing came with .007 runout on the primary shaft. They raise the limit just before I found this out during a comp problem. Is there no legal binding on what the tolerance was (.003) at the time it was manufactured and stated in the manual? Raising the tolerance to .012 should only apply to units made after that. Taking it up the ass is really starting to get old. Vent over.
Ron

[pittguy]

It seems that the comp side is usually the higher number,what was your cam side reading? The combined reading may make your build a warranty issue.

[JPBlueDragon]

18,000 on my TC96 and it runs better than ever. I am one of the handfull of TC96s still on the road of about 600,000 that have been sold. Someone up there must like me. Mine will definitely be a collectors item if it keeps running. Maybe they'll put it in the new museum. It's a conspiracy you know. The motor company got into metal salvage and recycling a few years back. Now they're getting to make money recycling the 599,995 TC96s that exploded and went to the scrap heap.

[claydbal]

Originally Posted by JPBlueDragon

18,000 on my TC96 and it runs better than ever. I am one of the handfull of TC96s still on the road of about 600,000 that have been sold. Someone up there must like me. Mine will definitely be a collectors item if it keeps running. Maybe they'll put it in the new museum. It's a conspiracy you know. The motor company got into metal salvage and recycling a few years back. Now they're getting to make money recycling the 599,995 TC96s that exploded and went to the scrap heap.

yep, kept the bad cranks and used the other parts to make the 09's.

[rbabos]

Originally Posted by pittguy

It seems that the comp side is usually the higher number,what was your cam side reading? The combined reading may make your build a warranty issue.

Not sure you can total runouts on both sides as only one or the other will count.
Ron

[Hillsidecycle.com]

Originally Posted by Josey Wales

There were some posts here and another forum about the possibility of the moco fixing the flywheels and adding a timken bearing. Well here is what they did do!

Left side flywheel – Shallower counter bore

Change to ALL Flywheels
END PLAY SPECIFICATION
.003” - .013”Starting in 09MY the flywheel will be able to
use either the long or short bolt. Long bolts will
be used up in production before the short bolt
becomes common for both. New flywheels will
retrofit.

There you have it, The Great fix.....Increased Runout specs that should fix it!

Just think, .002" more,(1/64') an you can use a yardstick to measure run-out.
Not a dimension that engine builders commonly use.

[pittguy]

Looking at the 07 to present yrs,it seems that the 07 crowd has the greatest failure rate.More mileage on the 08s will tell.They say the 07/08 cranks are the same so it kinda leans to a procedure or material used thing.Maybe the counter bore depth was the bending point prior to 09s on the comp side.Who knows maybe these were bored too deep mistakenly.Shallower bore moves weak area further outboard.Remember it seems the stock comp liked to bottom out and HD is offering a stronger comp in their screaming eagle section.Claiming 7% stronger.Many have posted of shifting at flywheel pin but maybe its more end play runouts?Has anyone that had the pin welded,timken and trued ever bother to recheck runouts afterwards?

[rbabos]

Originally Posted by pittguy

Looking at the 07 to present yrs,it seems that the 07 crowd has the greatest failure rate.More mileage on the 08s will tell.They say the 07/08 cranks are the same so it kinda leans to a procedure or material used thing.Maybe the counter bore depth was the bending point prior to 09s on the comp side.Who knows maybe these were bored too deep mistakenly.Shallower bore moves weak area further outboard.Remember it seems the stock comp liked to bottom out and HD is offering a stronger comp in their screaming eagle section.Claiming 7% stronger.Many have posted of shifting at flywheel pin but maybe its more end play runouts?Has anyone that had the pin welded,timken and trued ever bother to recheck runouts afterwards?

The counterbore will have little effect on the shift problem and will actually make the piece stiffer. Last time I had my 07 appart for comp mod the threaded depth of the shaft was twice of what the bolt used. 7 threads are all that are needed to do the job, and I believe mine was using about 10. If my modded comp goes for a ****, I'll be all over the newer model as it addresses all the flaws of the stock 07 unit. If you search for crank shifts on any v twin metrics, you won't find any, so it all boils down to a design issue. Generally insufficiant interferance on the pins or as in cast wheels , material not up to the task of maintaining the press fit. Misaligned bearing bores may not be that unusual with these engines and that in itself may cause enough deflection in the crank to produce a runout figure that is higher than on a truing stand. I would think any builder worth their salt would do a pre assemble on the bottom and do all the clearance, runout checks before final assembly.
Ron