The manual of TXT Pro says the engine oil capacity is 550ml and you can check the level at the round glass on the right engine casing. As I understand the oil level should be visible right in the middle of the glass with the bike straight up.

But there's is no way that I can fill 550ml and get the level right! After a drain and fill about 350ml it was OK already. Is this normal? I don't want to ride with a wrong oil level.

The English translation in the manual is very poor: on p.22 they say 'unscrew cap (' which is the glass oil level! Then even worse, 'use the dipstick to examine the level', c'mon, there is no dipstick! For an international brand like GG, this a bad translation. I need to look at the Spanisch section to find the real text.

Also on the fork oil explination I noticed an error: first on p. 11 it says 180mm air chambre for 250/280/300 and 160mm for 125/200 but then on p.30 there is a drawing and there it's is just the other way; 160mm for 250/280/300 and 180mm for 125/200! I understand that 180mm is correct for 250/280/300 with Marzocchi forks.

And how do I check the frontbrake and clutch oillevel on a Raga? The manual shows a level glas on the dot4 oil compartiment, but there's no oil level glas on the raga brake/clutch compartiment.

gearbox oil 375 cc to 400cc is plenty and change regular. fork oil level go to http://www.trialspartsusa.com/ and click on TECH all the info you need. clutch fluid on the bike is mineral not dot4 . fill to about half full or just over.