chappo Posted August 7, 2017 Report Share Posted August 7, 2017 Just swapped my Montesa 4RT for a Beta 300 4 T. So a bit new to this model having only had 2stroke Betas before. I followed the downloaded manuals advice re oil and filter change, but on putting the prescribed 900 MLS back in , the oil window is full , as opposed to half full as the manual suggests. I accept there will be a residual value of oil left in the sump after draining but I don't want to cause damage by over filling, anyone experienced the same or has advice on filling. Many thanks guys. Quote Link to comment Share on other sites More sharing options...
gu9cci Posted August 8, 2017 Report Share Posted August 8, 2017 I did the mistaken following the manual and 900 ml is way too much Im around 700ml.I suggest pour 600ml in and then ad slowly till you hit bottom of the window.Start the bike and warm it up and let it sit after shut of for couple minutes and then fill to half window hope this help 2 Quote Link to comment Share on other sites More sharing options...
lineaway Posted August 8, 2017 Report Share Posted August 8, 2017 Also, did you remove the two bottom screen filters? It is a pain, but at least 75 cc more oil. Quote Link to comment Share on other sites More sharing options...
chappo Posted August 8, 2017 Author Report Share Posted August 8, 2017 Thanks lineaway, I did, going to drain it again and fill using the window as a fill point rather than specific quantity. Quote Link to comment Share on other sites More sharing options...
brianrch Posted August 8, 2017 Report Share Posted August 8, 2017 FYI: I found 15w 50 belray ETR worked the best for smooth clutch and shifting Quote Link to comment Share on other sites More sharing options...
chappo Posted August 15, 2017 Author Report Share Posted August 15, 2017 Have drained it all again . Opened both screen filters and cleaned. Changed oil filter then filled to half window. Ran her till warm and topped up to half window. It actually took just under 700cc. So no idea why Beta say 900cc in the manual , as it's way to much. Quote Link to comment Share on other sites More sharing options...
lineaway Posted August 16, 2017 Report Share Posted August 16, 2017 900 cc for a complete rebuild from dry would be my guess. Just like forks, it is better to go by the level. Quote Link to comment Share on other sites More sharing options...
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