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45 OHV conversion

Moderators: Curt!, Pa

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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Tue Apr 10, 2012 4:02 pm

45 OHV conversion

Hello,
I just wanted to show a few pictures of my 45", OHV conversion I finished awhile ago. I went a different route than the standard Magnum conversion, opting for an exposed valvetrain. My favorite model is the Harley DAH. Since I will probably never own one, I figured I'd mix some ideas I had together, spend three years on it and, here ya go!!
Attachments
100_0671.jpg
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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Tue Apr 10, 2012 4:06 pm

Re: 45 OHV conversion

Can anyone tell me how to add more than one picture at a time?
Attachments
finish 1.JPG
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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Tue Apr 10, 2012 4:17 pm

Re: 45 OHV conversion

Some of the parts are:
T&O flywheels
Sportster rods
Andrews R5 cams
Sportster heads and cylinders
Linkert M53A1
Wico XV1922 magneto
WR narrow tanks
WLDR oil tank
Multi-year fornt end, VL RL J parts
Finned aluminum brake drum rings
Attachments
finish 9.JPG
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wilko

Posts: 159

Joined: Fri Jan 15, 2010 7:36 pm

Post Tue Apr 10, 2012 5:57 pm

Re: 45 OHV conversion

Great job. Are the rocker shafts supported in bronze bushes or needle rollers?
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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Tue Apr 10, 2012 7:01 pm

Re: 45 OHV conversion

They are stock rocker arms with bronze flange bearings in them. The shafts have a tube over them so the brackets can't be over tightened, pinching the rockers.
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servi53

Posts: 37

Joined: Fri Aug 26, 2005 5:26 pm

Location: central IL.

Post Wed Apr 11, 2012 9:24 am

Re: 45 OHV conversion

awesome work and result, if you want to do another you can do my servicar
servi53
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MarkBranst

Posts: 347

Joined: Thu Jun 24, 2004 12:01 am

Location: Champaign-Urbana, IL

Post Wed Apr 11, 2012 9:56 am

Re: 45 OHV conversion

Obviously, the engine work is the real deal, but the bike is also gorgeous. Really like the two-tone blue paint!

Mark
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celticdodge

Posts: 139

Joined: Mon Mar 27, 2006 5:29 am

Location: USA

Post Wed Apr 11, 2012 4:49 pm

Re: 45 OHV conversion

Just OUTSTANDING!! Man,really cool,what a super job.Fantastic,Amazing,how does it run? THANKS for sharing your work,very inspirational. :D :D
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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Wed Apr 11, 2012 5:30 pm

Re: 45 OHV conversion

Thanks for the compliments! It runs great and has a huge amount of torque! I have to keep reminding myself to take it easy on the poor little transmission. I'm sure it would not take much to peel it open. I did use one of the new european reproduction transmission cases, hoping for better quality aluminum from todays metalurgy, but was disappointed in the machining. I think all I gained was less money in my pocket!!!
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scaryguy

Posts: 20

Joined: Mon Nov 30, 2009 1:41 pm

Location: somewhere near Stratford, Ontario Canada

Post Wed Apr 11, 2012 5:41 pm

Re: 45 OHV conversion

Absolutely glorious! I would love to see a YouTube video of her running!
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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Wed Apr 11, 2012 7:44 pm

Re: 45 OHV conversion

I'll work on a video. If anyone is going to Oley, I'm going to bring it.
Attachments
100_0737.JPG
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jib

Posts: 571

Joined: Sat Dec 10, 2005 3:36 pm

Location: devon,england

Post Thu Apr 12, 2012 4:35 pm

Re: 45 OHV conversion

looks great . how are the rocker arm/pushrod sockets lubricated . see you have grease nipples for the shafts .regards jib
Dude, check out that jibhead, he's crazy. Hasn't been sober for 40 years
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scaryguy

Posts: 20

Joined: Mon Nov 30, 2009 1:41 pm

Location: somewhere near Stratford, Ontario Canada

Post Thu Apr 12, 2012 4:44 pm

Re: 45 OHV conversion

I love how you referred to the "standard magnum conversion"! If a 45 Magnum is standard, your motor is pure exotica. Drool worthy. I would be interested in some elaboration on the 4spd euro tranny. I was considering one until your comment. Could you make a critique of it with your observations/concerns with the unit?
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scaryguy

Posts: 20

Joined: Mon Nov 30, 2009 1:41 pm

Location: somewhere near Stratford, Ontario Canada

Post Thu Apr 12, 2012 4:47 pm

Re: 45 OHV conversion

Ooops! I just assumed you used the 4spd tranny but actually I don't know. Still curious, though.
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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Thu Apr 12, 2012 9:16 pm

Re: 45 OHV conversion

Scaryguy- My transmission is still a three speed. I only bought the case. I found two minor and one major problems as I built the transmission. The lid screws were 12-24 instead of the 10-24 they were originally (no big deal). There was one of the lid screws that was incorrectly located. I welded it up and re-drilled/tapped it (OK, mistakes happen). The last one was the distance between the shift cam shaft and the shift arm gear. They were .050" too close together!!!! And to top it all off, installing the shift gear is one of the last steps, so it all had to come apart again to fix it.
I did not buy the four speed for several reasons. One, too expensive. Two, untested. Three, The HP the bike puts out will most likely ruin the trans at some point, I figured I would ruin the cheaper, easier to get parts. I do not believe fourth gear was any higher a ratio then third was in the three speed. Its only benefit was smaller "steps" between gears. That would benefit the stock 45", but with close to four times the HP in my engine, I don't need it.

Jib- Yes, grease from the zerks is how the rockers are lubricated.
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Beachdog

Posts: 765

Joined: Mon Oct 16, 2000 12:01 am

Location: CA USA

Post Fri Apr 13, 2012 8:44 am

Re: 45 OHV conversion

Wow, It's beautiful. I also have loved the DAH since I first saw one in person. I bought a WR motor from an old racer back in the early 70's. The motor was in his basement in Springfield, MA where he also had a DAH. He would not sell it. He did let me sit on it, which was awesome. When I lived in NM there was a guy who had a couple in his collection just North of Santa Fe. Prettiest HD ever.
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45Brit

Posts: 1414

Joined: Tue Nov 27, 2007 2:29 am

Post Sat Apr 14, 2012 2:56 pm

Re: 45 OHV conversion

fascinating bike - tell us about the frame?
Shoot, a man could have a good weekend in Dallas with all that stuff...
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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Sat Apr 14, 2012 7:09 pm

Re: 45 OHV conversion

The frame started out with a raked neck and a bent rear section.
Attachments
16.JPG
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antiquespeed&machine

Posts: 28

Joined: Thu Aug 06, 2009 4:18 pm

Post Sat Apr 14, 2012 7:15 pm

Re: 45 OHV conversion

I found a donor (stock) neck, and replaced both it, the backbone and the tube above the engine. In the photo you can see ho much material has to be removed under the seat post casting. I also drilled out the neck and added the rear stabilizer bars, like the WR frames.
Attachments
82.JPG
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Pa

Site Admin

Posts: 4696

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Sat Apr 14, 2012 8:56 pm

Re: 45 OHV conversion

You have one beautiful creation there !! Both as eye candy and engineering.
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