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1965 R50/2 - run-in advice wanted
1965 R50/2 - run-in advice wanted
- schrader7032
- Posts: 9062
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Re: 1965 R50/2 - run-in advice wanted
My thoughts are:
- the first engine start after rebuild is probably the most critical. Once the oil begins to glaze up on the cylinder walls, the amount of friction and "shaping" of the rings begins to decrease. Only when the cylinder walls are non oiled and cool does that shaping really take place.
- for the first few rides, vary the engine speeds and RPM. Accelerate which puts pressure on the rings. Also, slow with engine braking which puts different pressure on the rings. I agree with avoiding high speeds and sustained speeds. Avoid idling.
- change oil often. I did it after the first ride then again at around 100/200 and finally at 500 miles.
- I also rechecked head torque and valve clearances at each oil change.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Re: 1965 R50/2 - run-in advice wanted
when do i drop the pan and check/clean the strainer?
- schrader7032
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Re: 1965 R50/2 - run-in advice wanted
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Re: 1965 R50/2 - run-in advice wanted
the bike has a couple of miles on it. including a very short (< 1mi) test ride by me. i was planning on draining the oil before break in as im not sure what is in there. if i were to drop the pan as well, how exactly would i go about adding magnets?schrader7032 wrote: ↑Tue Mar 12, 2024 9:28 amI would fit a number of super magnets in the bottom of the pan to collect any of the ferrous bits that show up.
Re: 1965 R50/2 - run-in advice wanted
Keith Patchett's rules for Iron bores covering the first 200 to 300 miles:
1. Fill the tank with hi-test to avoid ping.
2. Fill the sump to the "add" line with 20-50.
3. Perform a tune-up, paying special attention to getting the timing spot on. (You don't want ping.)
4. Pack two quarts of oil, a rag and a spout.
5. Go on a 200 to 300 mile freeway ride, keeping the engine at about 5000 rpm. Do not use 4th or 5th gear.
6. Stop every hour to check the oil level and top up as necessary but don't let the bike idle and heat up. You want to avoid glazing the cylinders and ruining your break-in.
7. Bring the bike home, torque the heads, set the valves and change the oil and filter.
- schrader7032
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Re: 1965 R50/2 - run-in advice wanted
As for Kieth Patchett's suggestions, I personally would not do the ride keeping the engine at 5000 RPM...or whatever RPM you wanted. The engine and components are all very mechanical and they will have vibration interactions with each other. At certain RPMs, the engine vibration is higher while at others, the vibration is very little. The last thing you want to do is sit at some RPM which might be hurting the engine components (for break in) or doing absolutely nothing. My position is the vary the RPMs up and down with acceleration and deceleration to make sure all vibration modes of the engine are activated and the components have a chance to bed in properly. YMMV!
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
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Re: 1965 R50/2 - run-in advice wanted
Chuck S
Re: 1965 R50/2 - run-in advice wanted
Dave