On my Cyclone dip stick there are two marks presumably one for low and one for high oil level, If I have the oil nearer the high level mark the oil filler cap blows off after a minute or two while the engine is running! so I only have the oil showing on the bottom of the stick now in case this happens when i'm riding it, I did notice when I changed the oil the book said 1.9 litres was needed, but that didn't even touch the bottom of the dip stick thats why I put a little more in hense filler cap popping of. do you think I have the wrong dip stick or dont those two marks mean anything. any info please (it has the standard plastic oil tank)

They all do that sir ........check your engine breathers ......if you look at the seat, you will see that it is designed to prevent the cap from blowing out

Oil change requires 2.5 US quarts, which is aprox 2.5L........oil should be drained when hot and immediately after shutting off the motor or wet sumping will occur.
2L of oil should be put into the tank and then run the engine whilst watching for circulation.......top up until level is between the marks on the stick.

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

Thanks Maz