Flywheel pinion race

[xlfan]

What do you guys do when new pinion race is needed @ flywheel pinion shaft? Is it necessary to grind the bearing surface to obtain correct surface? Or is it necessary to grind it down due to too large circumference?

xlfan

[Evo1]

Great excuse to install a stroker crank.

[lupe]

What do you guys do when new pinion race is needed @ flywheel pinion shaft? Is it necessary to grind the bearing surface to obtain correct surface? Or is it necessary to grind it down due to too large circumference?

xlfan

not pickin on u, but if you have the pilot hopefully u have the rest, look. pm if ya want, i will go over it all with u. if u have the complete tool u can do it at home and end up with a job better than most.  or if u want to keep it public i will try but it gets long your call.  i am just glad u give a chit, it WILL pay off for a solid bottom end. period  worth the effort by far lupe

[Dan89flstc]

The pinion bearing race is precision ground after it is installed onto the pinion shaft. Not something an average auto machine shop should be trusted with, even if they say they can do it.
 
This is something that should be done by a competent machine shop that specializes in big twin work.

The outer race (bushing) is lapped. Then both are measured and from those dimensions the proper size can be determined for the inner race roller assembly. 

[lupe]

The pinion bearing race is precision ground after it is installed onto the pinion shaft. Not something an average auto machine shop should be trusted with, even if they say they can do it.
 
This is something that should be done by a competent machine shop that specializes in big twin work.

The outer race (bushing) is lapped. Then both are measured and from those dimensions the proper size can be determined for the inner race roller assembly.

my mistake here maybe. i the gent was talking about outer race, if the shaft was the ? i am wrong. the advice above is good, but most replace the Shaft if not whatever, grinding the shaft would be more than new i would expect. plus u might have trouble with oversize roller dimensions etc etc. But, if the reference was to the SHAFT i am wrong and diregaurd tx guys lupe

[Dan89flstc]

On the 3 piece cranks the shaft is part of the flywheel, so the pinion bearing is replaceable. At least that is how my `89 is configured. When the pinion bearing failed, I split the cases and pulled the wheels out and had the local dealer rebuild the crank.

They did not have the capability to grind the bearing, so they sent the pinion shaft/flywheel back to Harley for a new bearing and grind, cost 75 bucks. Still running fine since the rebuild 13 years ago.

[lupe]

On the 3 piece cranks the shaft is part of the flywheel, so the pinion bearing is replaceable. At least that is how my `89 is configured. When the pinion bearing failed, I split the cases and pulled the wheels out and had the local dealer rebuild the crank.

They did not have the capability to grind the bearing, so they sent the pinion shaft/flywheel back to Harley for a new bearing and grind, cost 75 bucks. Still running fine since the rebuild 13 years ago.

i understand, saw his ? under tc and evo, wasn,t sure about 5 piece or 3.  point is yer advice will get him going. thats good. i was wrong to post without more info on my part. i am surprised hd could or would do that for u. that,s good to know.  wonder how many thou they ground off.  tx lupe

[wfolarry]

The race is typically .005 - .007 oversize. After it's pressed on it's ground to size. If you replace the bushing in the case you need to hone this as well. They're not always round after they're installed hence the grinding. Not a difficult job for a machine shop.

[lupe]

The race is typically .005 - .007 oversize. After it's pressed on it's ground to size. If you replace the bushing in the case you need to hone this as well. They're not always round after they're installed hence the grinding. Not a difficult job for a machine shop.

got it. thanks much, lupe ;;------------------------------------------------------------------------