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I got so oil, made up a fuel cell, and started kicking.
I got it running. An old rats nest along with peanut shells exploded from the exhaust pipe.
Made a mess of the shop, bits of burning nest and peanut shells. Got that mess cleaned and went back to the bike.
It runs, just not very well. I have to work on the carb. It is starving for fuel. Probably air leaks in and around the carb and maybe the jury rigged tank.
Anyway it runs and it will only get better from here. The magneto may also be a little weak.
Thanks to everyone who reached out with advice.
Hopefully another one back from the dead.
email (option): cbhaws@verizon.net
Update
The fuel problem was with My jury rigged fuel tank. Got that sorted and we got on the right track to tuning.
So for a few questions
The only Non-detergent oil I could buy today was 30 weight. I did not run the bike long or even put it into gear. It was at no load. I have ordered AeroShell 50W non-detergent. Temperature is in the high 80 to low 90’s. Man it is hot.
I have a tell tail I just hooked up. It shows no pressure.
The oil is being circulated from the tank to the engine and back again. It has a good flow.
How much oil should be flying around in the valve compartment? The one behind the stacked rifles? I was running with it open and not much oil was entering. Everything had oil on it but I thought oil would gushing around?
All oil was drained out of the engine oil tank, and transmission. The chain case has a red fluid in it. I suspect transmission fluid. Is this OK?
It idles nicely, but right now coughs at sudden full throttle. The throttle needs to eased on. I need to hook up a big fan and do some more tuning. Did not want her to over heat. I saw 350F on the exhaust header and 275F on the head.
The bikes exhaust is surprisingly clear. No blue or black smoke.
Hopefully we are done with blowing rat turds and grass out the exhaust.
email (option): cbhaws@verizon.net
Charlie the oil pressure on these is very low! Something like 8 PSI if memory serves. It's fed from the pump to the cam spindles and big end roller bearing....The rest is basically mist feed. As long as it's returning is usually good enough.
ATF in the primary case is ok. It's a dry clutch and just lubricates the chain, cush drive and clutch rollers. The book calls for ordinary engine oil.
There is a sprung loaded ball valve situated behind the plug at the bottom of the timing case. You might want to take it out and give it a good clean up with WD40 and a cotton bud.....Or similar! Fit a new ball and give it a sharp tap with a skinny drift to create a good seat..... When these leak it can allow the oil in the tank to slowly drain into the crankcase "WET SUMPING" Ron
email (option): ronpier@talk21.com
The anti drain valve is on the feed side of the system 'downstream' from the pump and operates at approx. 7 psi when the spring loaded ball lifts of its seat....The pump can deliver a pressure way over that when pumping against a 'blind' gallery, around 60psi before oil starts to bleed back past the gears due to back pressure....
However, once the anti drain valve is off its seat it is an 'open' system which does not rely on high pressure like an engine with white metal big end shells...The system just needs the right volume of oil and the operating pressure is negligible...
Oil feed to the valve guides etc. is through a hole in the top of the crankcase face inside the tappet chest. The supply is in the form of oil mist that is forced up through the hole as the piston descends on the downward stroke... After the engine has been run for a while there will be a little residual oil at the bottom of the tappet chest but it is basically empty as any accumulated oil drains back through the supply hole...With the tappet cover removed and the engine running you will hear the air movement but it takes a while for any oil to become visible on the exposed surfaces...Ian
email (option): ian@wright52.plus.com
email (option): cbhaws@verizon.net
Again ordinary engine oil for the gearbox 40 or 50.
If the engine has "wet sumped" the oil can cause drag on the flywheels making it harder to start. The answer is to drain the crankcase first. But since you've had it running with no smoke, I assume it's not the case? Ron
email (option): ronpier@talk21.com
Charlie, I had heard that in the USA, you can get 30 and 50W old-style oils at anywhere that sells supplies for farm machinery. Farmers use it on their old tractors of course.
There are a lot of bronze bushes in the gearbox so modern Hypoid gearbox oils are not recommended...As Ron says, your 50W (or alt. 40W) engine oil is the correct thing for the BSA gearbox with the ambient temperatures you are running in...
If you are absolutely sure the valve lifter is lifting the tappet (and valve) I would check the primary chain tension, if it's very over tightened it can make the engine stiffer to turn over...The engine should turn over very easily with the valve lifter raised...Ian
email (option): ian@wright52.plus.com
email (option): cbhaws@verizon.net
Years ago New Jersey was called the Garden State because of all the farms. Not so anymore. Not even Tractor Supply carries non-detergent.
Amazon has AeroShell for $100.00 a case and two weeks delivery. I used to AeroShell in my Piper Cherokee many many years ago.
Aircraft Spruce Company has it for $44 dollars a case and two day delivery UPS for a $17 USD. Sometimes Amazon is a rip-off.
email (option): cbhaws@verizon.net
Years ago New Jersey was called the Garden State because of all the farms. Not so anymore. Not even Tractor Supply carries non-detergent.
Amazon has AeroShell for $100.00 a case and two weeks delivery. I used to AeroShell in my Piper Cherokee many many years ago.
Aircraft Spruce Company has it for $44 dollars a case and two day delivery UPS for a $17 USD. Sometimes Amazon is a rip-off.
email (option): cbhaws@verizon.net
It's often difficult to achieve the amount of clearance shown in the manual for the valve lifter and still get it to operate (lift the valve off its seat)...Clearances do not reduce very much when the engine gets hot but it is important that there is some clearance between the lifter and the tappet head when the exhaust valve is fully closed...
As long as there is minimal clearance and the tappet head is free to rotate with the engine at working temperature that's OK...
Because of the 'silencing ramps' on the cams the valve is only fully closed for a very short amount of its rotational movement. Therefore, always follow the same procedure as you would when setting the tappet clearances to ensure it's in the correct position before making adjustments to the valve lifter...ie When the inlet valve is closing and the inlet tappet just becomes free to rotate as the valve spring pressure comes off it, the exhaust is fully closed...
It can be a test of patience to get it right but if you have an M20 with good compression it definitely needs to be operational...Ian
email (option): ian@wright52.plus.com
email (option): cbhaws@verizon.net