Douglasmotorcycles.net
Advertising and Classifieds => Douglas Motorcycles and Parts For Sale - Private => Topic started by: Doug on 12 Oct 2013 at 19:50
For sale, new Dirt Track rocker spindles (part #6735-2).
(https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/rockerspindle-advert-small-1.jpg)
Larger view (https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/rockerspindle-advert-large-1.jpg)
(https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/6735-2-advert-small.jpg)
Larger view (https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/6735-2-advert-large.jpg)
Including 5/16-25 nut with Whitworth hex (part #711), and heavy washer (part #735-1). All machined for 4130 alloy steel and heat treated to 35HRc.
Do the ends of your old spindles look collapsed like this?
(https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/rockerspindle-advert-small-2.jpg)
Larger view (https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/rockerspindle-advert-large-2.jpg)
Has the rocker arm sleeve been spinning on the spindle and wearing it down like this, or worse?
(https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/rockerspindle-advert-small-3.jpg)
Larger view (https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/rockerspindle-advert-large-3.jpg)
Well now you can finally replace it! Fully interchangeable with the original, including the special 5/16-25 Douglas threads.
The design has been altered slightly to leave a small bridge across the slot to prevent it from collapsing when the nut for the grease/oil reservoir is installed and inevitable over-tightened. It can be seen here:
(https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/rockerspindle-advert-small-4.jpg)
Larger view (https://www.douglasmotorcycles.net/aa-files/images/doug/2013/adverts/rockerspindle-advert-large-4.jpg)
This does not interfere with installing the oiling wicks, but the bridge can be removed with a file if so desired to be just like the original. The spindle is drilled axially and a small cross hole meters the liquefied grease to and undercut and thence the rocker spindle sleeve, lubricating the rocker arms. For short joy rides it is not recommended to use a high temperature grease, as it takes too long to get fluid and provide the requisite lubrication. A heavy oil is better, albeit more messy.
Cost is $50US per spindle, including the nut and washer. Packing, postage, and insurance at cost.
D. Kephart
Glen Mills, PA, USA
[price increase -Doug, 25Feb15]
[update links. 29Apr19 -Doug]