CHOP CULT HOME
GALLERY   FEATURES   FORUM   EVENTS   CLASSIFIEDS   BLOGDUMP   COMMUNITY   MEMBERS   STORE  
















Harley WR Racing Engine

I've been jammin' the last few weeks to get this WR engine done so I can deliver it to
The Mama Tried Motorcycle Show on Feb. 15-16 in Milwaukee.  This particular engine has some documented race history with a top 5 finish in the early 1950s at the legendary Springfield Mile. 
After repairing the engine cases, machining, measuring, etc.  Almost every part on the engine has required attention.  The motor was assembled when I received it, but the parts mirrored "swap meet specials" haphazardly assembled.  The ball bearing construction appears easy to conquer...but now you're dealing with hand-press-fit on everything.  It's very difficult to align the cam timing marks when each cam is pressed into position.  There are so many particulars that need addressed when assembling an engine of this nature.  Basically, it's got to be perfect, or it won't run at all.  This is the 5th ball bearing-type engine I've built (with my dad too) - and we still spend about as much time reading, as we do building the motor.
The magneto is a horizontally mounted Wico Single Fire type unit.  The ignition timing is best set by
location of the piston to TDC...then verify the timing actual timing mark on the flywheel.  On the earlier WRs, once the gear cover is on...you can't change your timing from the outside, since the magneto is bolted solid to the case.  No rotation.  The Wico cap has a #1 which indicates the REAR(or #1 cylinder) and the spark plug wires must be installed correctly. 
I updated the sprocket shaft seal (from the steel reverse thread seal) to a modern type rubber-lip seal.  The seal kit (from Colony) is the same as a Big Twin seal, since the sprocket shaft in a WR is the same diameter as a panhead....but runs the larger 25mm ID ball bearing.  A #1205 ball bearing to be exact: 25mm x 52mm x 15mm Superblend-type bearing.

The lower pump has been checked over, blasted, washed and inspected.  I painted it my special cast iron gray, installed, with breather timed.  I bumped the breather ahead 1 tooth, since the piston was already about 2" down in the cylinder before it started opening (via timing mark).  By one tooth advanced, the breather window opens just after TDC - to get that crankcase evacuated of pressurized air a bit sooner. 


Comment with Facebook


 
 

Comment with Chopcult (0)

Please Login to Comment





Recent Blogs

New Focus Feature: The 3rd Annual Congregation Show

Words and photos by Panhead Jim
I can almost guarantee that if you are reading this article, that you probably grew up hitting bikes shows at local Harley dealerships and independent shops. You remember the ones, where two dozen bikes show up in some parking lot on a Saturday morning, and if you were lucky, there was one cool motorcycle worth checking out. The thing was that one cool bike made the whole event worthwhile, and you probably spent the rest of the weekend talking about it. Now try to wrap your head around an event where there are over 100 motorcycles spread out in a century-old Ford factory, and every single bike is badass.
 Read more.

Final chance to save some cash with Alpha 6 Corp.

Alpha 6 Corp would like to offer you the opportunity to try their paint. Please go here and use the code ALPHACC to get the ALPHANAMEL Mini-Starter set for $14.99 ( a $30.00 value). You will receive 2 oz. each of the Alphanamel Alpha White, Hanson's Red and McKeag's Black. This promotion ends tonight (5/19/) at midnight PST.

DRAG SPECIALTIES SEATS LOW-PROFILE SOLO SEATS

Drag Specialties Seats now offers a double diamond pattern for its popular low-profile seat. These seats feature solar-reflective leather in the seating area and automotive-grade vinyl on the sides. This patented process reduces surface temperature by as much as 25*F for a cooler seat, higher durability and longer life over conventional leather or vinyl. Underneath is a flexible urethane foam interior to provide maximum comfort. The 3/1" ABS thermoformed seat base has a carpeted bottom and rubber bumpers to protect paint from damage. A handy EZ-Mount system requires no tools for taking seat on and off. Seat geometry places rider 2" further back and up to 1" lower (depending on model) than the stock seat for a better rider position with improved styling. The seat also covers the two seat fender studs for a low, clean look. Can be used with Drag Specialties solo rear seats (sold separately) and includes mounting hardware. Proudly made in the U.S.A. Available with your choice of black or silver double-diamond stitching for 97-07 FLHR, 06-07 FLHX H-D models. Suggested retail starting at $328.95. For more information, go to https://seats.dragspecialties.com/ or contact your local Drag Specialties dealer.

BF 11 IS JUST AROUND THE CORNER

JUNE 22/23 2019 Visit www.bornfreeshow.com for more info

Enter The Alpha 6 Mega Pinstriper Pack Giveaway

Head over to our Instagram account and enter this sweet giveaway from Alpha 6 Corporation. We'll announce the winner on May 21, 2019. Big thanks to James for making this giveaway possible and for supporting the ChopCult community.

Welcome ALPHA 6 to the CC Family!


Started in 2016 by James (Kaye) Kwiatkowski of Detroit Bros Cycles - Alpha 6 Corporation produces Professional quality Lettering Enamels, Artist Tools, and Supplies made in Detroit, Michigan by artists for artists and artisans in the Pinstriping, Sign Painting and Graphic Arts Industries.

 


"We care about our products and those that use them. Our products are tested in the field by our team of artists and perfected using their feedback. We listen to our customers and retailers to ensure we are providing them with the highest of quality tools, supplies, and paint on the market. Our current lineup of products can be viewed and purchased at alpha6.bigcartel.com until the early June release of our new website, and you can follow us on Facebook and Instagram. Check out Darren McKeag's latest work below using his signature Alphanamel Darren McKeag Black. It's been an honor to work with Darren, and we can't wait to see more from him." -James

 

James would like to offer you the opportunity to try their paint. Please go here and use the code ALPHACC to get the ALPHANAMEL Mini-Starter set for $14.99 ( a $30.00 value). You will receive 2 oz. each of the Alphanamel Alpha White, Hanson's Red and McKeag's Black. The finest lettering enamel on the market.

New T-shirt Design by Chiko

Big thanks to Chris Rupcic at Chiko's Pinstriping for creating a new t-shirt design for CC. It blows our mind when people offer up there talents to help CC move forward. Please check out Chris' website and give him a follow on Facebook and Instagram for his generous donation. You can buy yours here. We appreciate your ongoing support!

Animal Welfare Institue

If you're interested in donating to any of the numerous animal charities out there, this is one of the best.  "The Animal Welfare Institute (AWI) is an American, non-profit, charitable organization founded in 1951 with the goal of reducing pain and fear inflicted on animals by humans. Its legislative division, the Society for Animal Protective Legislation (SAPL), pushes for the passage of laws that reflect this purpose."  Contributions actually go to the cause at hand and not just advertising. 
The AWI Quarterly magazine shows a glimpse where your money and efforts go.  "Since 1951, the Animal Welfare Institute has been dedicated to reducing animal suffering caused by people.  We seek better treatment of animals everywhere—in the laboratory, on the farm, in commerce, at home, and in the wild."

New Focus Feature

Take a moment to check out Holly Anderson's coverage for the first Locked 'N Lodi show.
Share This


         
CHOP CULT HOME

 

ADVERTISE    |    CONTACT    |    ©2009 - 2017 ChopCult    |    REPORT ABUSE    |    CONDUCT


Chopcult on Instagram Chopcult on Pinterest Chopcult on Tumblr Chopcult on Facebook Chopcult on Twitter