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tonyo
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Joined: 03/01/2011
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A few months ago I acquired a restored '64 R50/2, which I have been enjoying immensely. So much so that I have placed my '92 R100R on eBay (no takers) and have yet to ride my R1200R this season. When I bought the R50 I also purchased the Barrington Motor Works text on service and restoration. I was drawn to the chapter, "Go Fast, Go Faster and go Farther Modifications" where I read about some intriguing possibilities. Following the Betjemanns recommendations, I am considering the following:

1. The Bench Marks halogen 6v headlight bulb for the incandescent base.
2. The CU Layer 6v LED tail and brake light.
3. Strip, reline and turn the brakes.
4. Maintenance free battery.
5. Brown side stand (done and content with the results).
5. Larger oil Pan (done and happy with the results).

These seems like 'obvious' improvements that only improve the safety of the ride. Less obvious and more intrusive are:

7. Installing the Barrington Motor Works Flywheel to smooth out shifting gears and improve acceleration. I am curious to know what, if any, unwanted consequences might there be?
8. Battery/ coil ignition. I wonder what results others have had with these modifications?

If any of these topics have already been covered, please direct me…

Thanks,

Tony

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TonyO

schrader7032
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San Antonio, TX
Joined: 10/27/2006
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Tony -My thoughts:7) All

Tony -

My thoughts:

7. All my bikes have the heavy flywheel. They perform well and I don't need any more acceleration. I doubt lightening the flywheel on the R25/2 will do anything much to help its acceleration! That said, I've heard from others more knowledgeable that the heavy flywheel helps damp out the power pulses from each piston better than a lighter flywheel, so you might feel more vibration if the engine is not balanced well or if you have a higher level of differential timing. Also, a heavy flywheel helps with pull a sidecar, but that's only for select owners.

8. My R69S is the magneto ignition. It's nice to know that I don't really need a battery to run the bike. My R25/2 has left me stranded when the battery failed. The single is a battery coil ignition. I don't plan on changing either ignition system, but in some situations, it's nice to have the magneto.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

312Icarus
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Personally, I would keep the

Personally, I would keep the magneto ignition. Dead nuts reliable, easy to work on, and...you can get home if you have a bad generator/battery etc.

Icarus

Beemer100
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Tony,I think some of these

Tony,

I think some of these changes do make a lot of sense simply because today's traffic is a bit different to what it used to be when these bikes came on the market. (LED lights, improved brakes by using softer linings and match them to the drum).

4) Maintenance free battery is not really necessary if you use the original magneto system but won't hurt
5) Side stand is a matter of convenience. However, you need to know that parking the bike on a sidestand has some consequences: Oil runs out of the right cylinder head back into the engine. Not a big deal but don't be surprised when you adjust the valves on the right side and there is hardly oil in the chamber. You also might find out that the left carb tends to flood. So, always shut off your gas valve when you park the biest and when starting cold, you have to tickle the left carb LESS than the right one. I count the left side to 1 and the right side to 5 and the bike starts first kick. Once parked on the main stand I would need both sides counted to 5.
6) Larger oil pan has the advantage that you have more oil available. However, is has the disadvantage that you have more oil available ... means, the oil takes significantly longer to get to operating temperatures. Not an issue if you go for rides longer than 30 miles. The devinitive advantage is that these larger pans are made of aluminium. Means the sealing surface doesn't bend and therefore tend to leak less or not at all.

With #7 and #8 I would agree with the comments already made.

7 We are talking about an R50/2, right? This bike will never be as fast as a CB750. So, I honestly don't see the reason why someone would spend a lot of money and time to convert them. I think they put lighter flywheels on the last 2 years of the R69S ... but this was a completely different animal.
8 The magneto ignition - assuming all components are in good shape - is bullet proof. The advance mechanism has a certain lifetime and if its gone, it is very difficult to have a proper timing. But same thing here. A R50/2 is way more forgiving as a R69S and therefore I would keep it.

My 2 cents
Klaus

1967 R502
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Tony-Over the years I have

Tony-

Over the years I have tried lots of modifications. Here is my 2 cents:

1. Lightened flywheel- Worth it if you will go racing. Otherwise...probably not. The transmissions are clunkers by modern standards and always will be.

2. Hypoid Gaskets- Worth it if you are doing a complete tear down, but other wise not.

3. Stainless anything- Worth it. Every cent.

4. Digital Battery Ignition/Magneto Replacement- I have mixed feelings about this. I feel the magneto is reliable, but the ignition coil, and most of the multiple generations of repro coils are crap. I have had multiple failures. Why? Because the design of leaving the coil under the motor housing makes it susceptible to heat failure. I pack a spare coil, and yes, I've had to use it. I've been looking for what I would consider to be a good battery/coil replacement for years....haven't found one yet. I am hoping that someday, Morris Magneto, or someone like them will make a better Mag unit for BMW, and just end it.

5. Maintenance free battery- Worth it. Have battery acid spill onto your new paint job or exhaust once...well it's one time to many.

6. Koni Shocks- Slightly better than the Boges. Not worth it. But if your boges have had it, there really is no other choice.

7. 12 V system- When I rebuilt my bike 20 years ago, I would've said worth it. Now, with the advent of cheap LEDs, I would say, maybe not??? A toss up.

8. Petcock- If you have an ORIGINAL Everbest, junk it. They are complete crap and will leak if it is not already leaking. Replacement is worth it. Especially now that there are accurate replicas with rubber internals.

9. Hella bar ends- Worth it. They are small indicators, but better than nothing. No one can see your hand signal in the dark.

10. Albert headlamp mirrors- Worth it. Better rear view, and they look great. Stainless ones are better than the originals.

11. Sidestand-I've gone over 20 year without one, but now I am putting one on...I'll let you know. It is stainless of course.

12. Alloy Rims/ Stainless Rims/ Stainless Spokes- As with anything stainless, I'd say worth it. The original Weinemann rims are pretty, but soft. Modern alloys from Excel would be an improvement. My own rims are Raedelli Stainless.

13. Sport Tank- Worth it if you like the look. Otherwise not.

14. Hoske Tank- Again, worth it if you like the look...otherwise seriously not worth it. Seriously.

15. Saddle bags- Worth it.

16. Package rack- Worth it if you like the look. Otherwise not. In 20 years, I've never strapped anything on the rack...but it does look good!

17. EZ-Clutch- Meh.... I did have one break on me once. Fortunately I was close to home. Not something I'd want to repeat.

18. Deep Oil pans- I've had a bunch on different bikes and have had oil temp dipsticks on all of them. Is the oil cooler? Probably not, but a cast pan looks way better than stock. Worth it?

19. Oil temp Dip Stick- Not worth it. Does look cool though.

20. Silicone Gaskets- Worth it.

I hope that helps.

'67

schrader7032
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San Antonio, TX
Joined: 10/27/2006
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IMO the Emerald Isle coil

IMO the Emerald Isle coil that replaces the original coil is worth it. It seems to survive better in the environment than the original.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

tonyo
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Thank you, all! Thoughtful

Thank you, all! Thoughtful experience is golden and provides me with lots to chew on. I am grateful indeed. What a great resource this forum is! Look forward to further info about side stands… And to follow up exchanges as I learn what doesn't work…

Tony

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miller6997
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Koni?

I have Konis on my R69S that I bought *many* years ago. They are durable but provide a pretty stiff ride, even on the softer setting. More important, I thought they had been out of production and NLA for a long time.

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Jon Miller
'67 R69S
'13 F800GT

Beemer100
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with regards to replacing

with regards to replacing bolts to stainless steel ...

I personally would never replace bolts with a higher rating than 8.8
There were usually good reasons why the put stronger steel bolts at some places (fork, frame etc). Stainless steel cannot provide the same strength and can brake easier.

my 2 cents
Klaus

1967 R502
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Yes and no. Koni sold off

Yes and no. Joni sold off their motorcycle shock division, but their shocks are still produced by IKON. (See what they did there?). Last I checked the /2 shock was still available, maybe that changed?

Daves79x
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Just Got

I just got 4 new IKON shocks for my R69 project. They are alive and well, company that is. Let you know about the shocks.

Dave

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Dave

wa1nca
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Ashfield Ma.
Joined: 09/27/2012
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Upgrade

All good points

12 volt upgrade not needed if using all LED bulbs

The H4 headlight bulb is brighter but draws even more current than the original bulb

With all bulbs (except speedo light) replaced with LED lights the charging system works better than new

Tommy

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Tommy Byrnes
54 R51/3 55 R50 64 R27 68 R69US 68 Sears Allstate 250 (Puch)

miller6997
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Koni/Ikon

Some time ago, I contacted IKON for advice on changing the adjustment on my Koni shocks. The person who answered said that the newer IKON shocks for our bikes are not the same design as the older Konis. She was, however, able to resurrect the instructions for adjusting the Konis. I've never used the Ikon shocks, so I cannot comment on their quality--only that they are not duplicates of the Konis they replaced.

Jon

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Jon Miller
'67 R69S
'13 F800GT

shegan38
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Posts: 49
I've put a few miles on a

I've put a few miles on a r50/2 this year. Here's my .02.
Safety stuff like lights and brake pads, do it.
A r50 is a slow, remarkably dependable bike. Its nice like that. I leave mine alone.
Rack/bags definitely. So much more usable.
Magneto is gods gift to motorbikes. Leave it alone.
Stainless... If you pull original bolts, I'll be happy to buy them from you Smile
Deep oil pan is nice, but its nicer on a r69s.
Never had a big tank. Don't know.
Scott

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