The oil return pipe up by the headstock is a return & breather for the oil in the frame tank,an overfilled oil tank will return excess oil dwn the tube into your primary case,so the oil in frame tank will be over full hence the dipstick should be used..Ian..UK .👍
In 1976 Triumph deleted the alternator hatch and moved the timing pin up to 12.00 position. They also introduced gearshift shaft hole by that time but I can’t find an example of a left shift case with alternator hatch.
I have this system on my t100. We've always been told in the manuals that the primary chain should just 'lick' the oil level. I just take the oil level plug out occasionally to keep the level correct. Great channel Frank.
I am amazed that my 1965 TR6 was a hardtail at magneto has less problems than much newer bikes with lower miles that are much prettier to look at but have a devil in the details
When safety mats become the catwalk 😍 Showcasing a cool and timeless design there Frank 😎 Reminds me of a time when I asked a jeweller friend of mine to fashion a pair of BSA earrings from silver for my GF at the time...they were equally exquisite. Sadly he was killed shortly after whilst riding his beloved FXE.
Maybe if the engine was wet sumping and left standing for a period of time the excess oil seeps through those 3 holes overfilling the primary case. When the engine is started the excess oil in crankcase is scavenged out of the crankcase by the pump. I have had an oil leak from the alternator cover but usually that is easy enough to see. The primary does have a level plug at the 4 o’clock position, btw. You can see it at 23:00 bottom left.
@@fjdelmonte my T120s & T140s have all wet-sumped despite the twin tube oil pumps and despite tapping (reseating) the ball bearings down. I’ve had 5 of them so I know from smokey, oily experience. I’ve torn down and rebuilt several Triumph twins over 40 years and that still e…… it’s a mystery. Maybe debris gets under the return side ball. My present T140 is a ‘73 build (during the lock-in) according to the engine number registered and sold ‘74 and it has no plug - I’ve just been out to check! I have an external spin-on oil filter on the return side before the oil in-frame tube so hopefully the oil will be cleaner in the reservoir and into the pump.
Surprised to see what looks like the original rotor and stator on that bike. I had to replace the original rotor on my '72 several years ago when the magnetism became weak and no longer charged the battery.
It could be original. I don't know. If I have a bike that doesn't charge very well I test the rotor by hanging it from a big box end wrench. If it hangs well and can't be shaken off easily I figure it is still good. That's not very scientific but it's one way to do a quick check. I have seen rotors that would barely support their own weight. Changed them out right away. Thanks for watching.
Which problem does it not have? A difficult to find oil leak, or the high oil level in the primary case? I'm still puzzled by the 18 ounces of oil in the primary. Can't figure out why that was a good design idea to someone.
After the bike was started and idled for a while then left overnight the oil leak appeared on the floor more to the rear of the primary case. In the last vid the underneath search for the leak was not shown on camera.
I will continue the search. Next test will be after Kevin returns and does an extended test ride. Then we will let it sit on the sidestand and see what develops. At this point I THINK the big leaks (dinner plate size) the owner photographed were from the Primary Case Timing Access Cover due to the 18 ounces of oil in the primary case resting on the cover. Standby. Time will tell.
Wow! I never noticed but the Haynes manual is speaking in British measurements, which means that 5/8ths of a pint should be 12 ounces rather than the 10 ounces I computed. I think. But the British ounce is smaller than the U.S. ounce. So, I just dunno. (Now a days, numbers make my brain hurt.) Anyway, the oil that came out of the primary on this '72 Triumph measured 18 U.S. ounces. It seems like a lot. Thanks for watching and thanks for writing. Now go out and treat yourself to a 16 oz steak dinner. U.S. or British.
I missed one of the previous videos. Is there a seal/ bush set up behind the clutch basket? I had an old 6T pre unit and stopping oil leaks was a daily chore.
Both the Primary case seal and tranny mainshaft seals were replaced when we changed out the clutch assy and I can't find any evidence of oil on the backside of the primary case nor on the front of the tranny behind the sprocket. I will continue the search. Next test will be after Kevin returns and does an extended test ride. Then we will let it sit on the sidestand and see what develops. At this point I THINK the big leaks (dinner plate size) the owner photographed were from the Primary Case Timing Access Cover due to the 18 ounces of oil in the primary case resting on the cover. Standby. Time will tell.
I'm actually surprised the oil gets that high in the primary.. maybe thats why they changed that primary cover to have the smaller inspection hole that sits up higher.
