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November 3, 2018

Shovelhead frame repair in the top neck bearing area

The bearing race was way too loose on the top of the 1980 frame for an unknown reason, and it need to be repair, so my friend ask me to take care of it for him, he heard that I have done something similar in the past,here is some pics of the steps I have taken .

So I pull out a special tool I did years ago to correct a similar problem on a Evo frame, did a few modification to adapt to the shovelhead frame, the goal here was to machine the top portion in perfect line to bottom bearing axis with a guide in the bottom bore and add a bushing flush to bottom of top bearing area ,the boring bar will have a better stability and the bore would be possible

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Filed under Other, Random Ideas, Resources, Saddlebagrail's blog, Tech by saddlebagrail

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February 21, 2018

How to correct a machining error in oem Harley Davidson head bolt thread drill too deep

Hi to all

Sometimes manufacturers make maching mistakes and it take a while sometimes to found the issue,and many often left facory like that and sometimes even worst,quality control was almost non existent in the past,often today .

Here it is ,you can barely see a black spot in the bottom of the thread(holes going throught drain hole cavity),the hole was drill too deep from factory and oil coming to drain to the bottom of the cylinders was sligthly leaking the head bolt thread all the way to head gasket,and into combustion chamber,so this is what I did to correct the problem.

 

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Filed under Engine & Transmission, Motorcycles, Other, Random Ideas, Resources, Restoration, Saddlebagrail's blog, Tech by saddlebagrail

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November 7, 2016

Classic Harley Davidson Star hub rebuild with new type quality ball bearing

This time I will show you how to update some worn out old Harley Davidson star hub, in early wheels Harley were using some loose rollers in cage that were running into the case-hardened housing bore, to rebuild them to like new condition, they should be lap and the use of oversize rollers were need, quite a job for a regular guy to save those hubs.
I decide to modify the inner guts only to accept usual ball bearing, meaning that I will not use loose rollers anymore, all internal will be update but external look will stay exactly the same which is quite important when doing update like this.First, here is some pictures of hub and mandrel use during the process
Here you can see a real worn inner hub, inner surface should be really smooth usually when loose rollers were riding into housingSmall sleeve need to be out before the machining, you can see it against the shoulder

Star hub mount on an custom-made aluminum machining mandrel, press in place with live center from lathe tailstock. Just a light interference of .001 should do it.

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Filed under Other, Random Ideas, Resources, Saddlebagrail's blog, Tech by saddlebagrail

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