Locksmith or shortwire.
Don't have a clue, sorry mate :/
A stock 1980 ET 250 has 23 horsepower.
17.00 HP (12.4 kW)) @ 7500 RPM according to manufacturer specs for 1980
From what I have read in the shop manuals for the 1979 and 1980 Exciters, there was a change between those 2 years where the CDI was not interchangeable due to the timing. So, I'm not sure how well it would run if you used one from a 1978 Exciter in a 1981 Exciter, or if you would eventually burn down the motor. However, if you have installed one, and it is working, then that's great.
You do not "lube" a centrifugal clutch. http://www.snowmobileforum.com/engine-drivetrain/26360-generic-clutch-cleaning-advise.html
my snowmobile i got it going to 65.
40:1 from what I've read
The ec540d was made in 1979 & 1980 only. There is no 1995 model. Do you mean the XVL model XL540 that started in 1985 as XL549J? Every year the last letter went up, such as 1986 XL540K, 1986 XL540L and so on.
The Yamaha 850 XS is an air cooled bike. There is no radiator to fill.
If you are talking about the 1980 Yamaha Enticer, the top speed would be 55mph.
133.6 MPH
On a Yamaha 1980 XS400 the valve clearance for the inlet valve should be 0.0003 inches. The valve clearance for the exhaust should be 0.006 inches.