I Bought An RPOC Today

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Tomcatfixer
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Re: I Bought An RPOC Today

Post by Tomcatfixer » Tue Mar 12, 2019 8:52 pm

Wonder if the cam bearings are rusted that bad?
Oh yeah. They've gotta be replaced. ALL bearings in this motor require replacement.
What else does the cam do in a Ural motor besides the valves? Anything?
The gear on the rear of the cam drives the oil pump and the gear on the front drives the alternator.
Mag wheel cleaner or A/C coil cleaner
Good tip, Mike. Didn't think of them.
- Chad

Virginia Beach + Gordonsville, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 2001 Ural Patrol "The Patrol", 1999 Ural Tourist "The RPOC", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

Previous rides:
2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)

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Birdy
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Re: I Bought An RPOC Today

Post by Birdy » Tue Mar 12, 2019 9:12 pm

You have both gears off though? I saw you had pulled the ALT gear off.

I have had ALU parts walnut blasted to clean them when they are in real bad shape. I knew the people who ran that shop but I don't think it's all that much.
2017 Ural Patrol, Lenin's Revenge
2012 Kawasaki Versys, Mini Me
2008 Royal Enfield...the money pit, undergoing restoration

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Tomcatfixer
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Re: I Bought An RPOC Today

Post by Tomcatfixer » Tue Mar 12, 2019 9:24 pm

You have both gears off though? I saw you had pulled the ALT gear off.
I can only pull the oil pump drive gear once the cam is removed from the crankcase, but the oil pump shaft gear has been removed from here...
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...which should allow the cam to come out the front.

I guess I gotta figure out how to extract the cam bearing and the cam will come out with it.
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- Chad

Virginia Beach + Gordonsville, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 2001 Ural Patrol "The Patrol", 1999 Ural Tourist "The RPOC", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

Previous rides:
2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)

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mattzahr
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Re: I Bought An RPOC Today

Post by mattzahr » Tue Mar 12, 2019 9:28 pm

Chad, have you attempted the black oxide clean up yet? The mag wheel cleaner is a great idea - also, vinegar will work if you have patience for long dwell time.

Coca Cola will work too......
'16 cT - Terracotta aka Orange
Proud member of the "Group W Bench"

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VWNate1
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Cleaning Aluminum

Post by VWNate1 » Tue Mar 12, 2019 9:35 pm

I've been a Foreign car mechanic a long, long time and cleaning of alloy & aluminum parts without damaging them is always tricky .

I was taught way back in the early 1970's to never, EVER use acidic cleaners, oven cleaners come in two types, one has a chemical that will destroy alloy/aluminum parts so be cautious here ! .

Vinegar is not kind to aluminum .
-Nate
'94 Tourist 650
'96 650 Solo
'10 Solo sT Crashed & Ruined 6.26.17 :cry:

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mattzahr
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Re: I Bought An RPOC Today

Post by mattzahr » Tue Mar 12, 2019 9:57 pm

Vinegar can be tricky, but the concentration is typically low enough that it may be used safely for this type of application- that said, there are as many stories of a bad experience as good ones - commercial applications as a metal "brightener".

Oven cleaner is most always a strong alkaline cleaner -(grease is a fatty acid) - Sodium Hydroxide based on more aggressive brands - it will turn aluminum in a nasty sludge in no time....old dip tank engine cleaners (used to sell it to machine shops MANY YEARS AGO) were sodium hydroxide (Soda Ash) and eventually, a newbie would place an aluminum part of some kind in the tank - magically, it would disappear or morph into a lump. Then the tank would have to be re-charged....
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Birdy
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Re: I Bought An RPOC Today

Post by Birdy » Wed Mar 13, 2019 11:04 am

Well you can always paint it...Basic Black...goes with anything! Even Jersey Devil Mud! :lol:
2017 Ural Patrol, Lenin's Revenge
2012 Kawasaki Versys, Mini Me
2008 Royal Enfield...the money pit, undergoing restoration

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Tomcatfixer
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Re: I Bought An RPOC Today

Post by Tomcatfixer » Wed Mar 13, 2019 6:21 pm

This evening, I was able to extract the camshaft by heating the seized ball-bearing in the front and the bronze plain bearing cup in the rear with a torch, then driving the bearing cup forward with a drift and hammer until the front bearing popped-out of the crankcase.
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2019-03-13 18.08.00.jpg
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Removing the rear crank bearing carrier plate was remarkably easy. One difference from the 750cc motor is that there's no bearing back-stop to the carrier or infuriating snap-ring to retain the bearing. Honestly, I don't fully understand how everything stays where it should. 🤔
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The cam bearing is ruined and the cam looks fairly nasty. I doubt it's salvageable.
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Everything will get a thorough cleaning, especially the oil passages. That front bearing has got to go, too.
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- Chad

Virginia Beach + Gordonsville, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 2001 Ural Patrol "The Patrol", 1999 Ural Tourist "The RPOC", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

Previous rides:
2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)

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Birdy
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Re: I Bought An RPOC Today

Post by Birdy » Wed Mar 13, 2019 6:41 pm

Glad you got it apart. Looks like it was "Fun".
2017 Ural Patrol, Lenin's Revenge
2012 Kawasaki Versys, Mini Me
2008 Royal Enfield...the money pit, undergoing restoration

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Tomcatfixer
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Re: I Bought An RPOC Today

Post by Tomcatfixer » Wed Mar 13, 2019 7:45 pm

Well you can always paint it...Basic Black
Funny you should mention that...
I was actually planning on painting this engine with the Dupli-Color gloss or satin black. I was gonna choose little detail pieces, such as the raised "stripes" on the valve covers, to sand (and possibly polish) for a little contrast.
Looks like it was "Fun".
The tear-down is always the fun part, but the build-up is more satisfying.

I figured out how the bearing "stays-put" (thanks to gobium telling me to look more closely)....
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2019-03-13 19.17.31.jpg
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Here's a fun view inside the crankcase...
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And another with labels...
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2019-03-13 19.31.29.jpg
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- Chad

Virginia Beach + Gordonsville, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 2001 Ural Patrol "The Patrol", 1999 Ural Tourist "The RPOC", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

Previous rides:
2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)

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Penrod
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Re: I Bought An RPOC Today

Post by Penrod » Wed Mar 13, 2019 9:03 pm

:lurker: Ah...red arrows make all clear. Only about 1,000 parts in the engine.
2015 cT Special Edition Dark Force
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Birdy
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Re: I Bought An RPOC Today

Post by Birdy » Wed Mar 13, 2019 9:18 pm

Work on a Royal Enfield Iron Barrel engine. In the cases there is the crank, rod, three bearing...and that's about it. The rest is mounted outside with a subcase for the timing gear train, cams, tappets and oil pump, cylinder has the piston and valve rods with the head having the rest. Points are outboard as it the oil piping for the head. I've seen more complicated lawn mower engines. The one I'm dealing with was in boxes and other than the wait for all the missing Whitworth hardware I had to order from England to show up I had it back together and running (poorly) in about an hour. There are good things to be said for simple old designs like the Bullet and Ural. It took 2 days to do a valve adjustment on my Versys, had to take half the bike apart just to get to the valve. Takes about an hour on the Ural...if I take my time.
2017 Ural Patrol, Lenin's Revenge
2012 Kawasaki Versys, Mini Me
2008 Royal Enfield...the money pit, undergoing restoration

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Tomcatfixer
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Re: I Bought An RPOC Today

Post by Tomcatfixer » Thu Mar 14, 2019 7:16 pm

I now have the "bonus" engine almost completely disassembled.
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2019-03-14 19.06.46.jpg
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- Chad

Virginia Beach + Gordonsville, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 2001 Ural Patrol "The Patrol", 1999 Ural Tourist "The RPOC", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

Previous rides:
2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)

rougaroo
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Re: I Bought An RPOC Today

Post by rougaroo » Fri Mar 15, 2019 9:30 am

Chad - you're that far in, you might consider the upgrade of taking the cam to a machine shop and having them turn the rear shaft to fit the oversize roller bearings in place of the brass bushing. Van has some of the bearings.

Rougaroo
2003 Tourist - lotsa upgrades
2004 Troyka - work in progress

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Tomcatfixer
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Re: I Bought An RPOC Today

Post by Tomcatfixer » Fri Mar 15, 2019 9:44 am

might consider the upgrade of taking the cam to a machine shop and having them turn the rear shaft to fit the oversize roller bearings in place of the brass bushing.
Funny you mention it; I was actually considering doing that very thing. :wink:
- Chad

Virginia Beach + Gordonsville, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 2001 Ural Patrol "The Patrol", 1999 Ural Tourist "The RPOC", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

Previous rides:
2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)

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