GT250A oil lines problem?

[Mark9]

Hi, I’ve not posted for a long time but I’m back having bought a GT250A, it hasn’t run for a few years and it came with clear oil in the 2 stroke oil tank, I drained it and swapped it for Silkolene red oil, I’ve been running the bike on the driveway, it’s not road registered yet, the red oil eventually came through the lines replacing the clear oil, however 3 of the lines are now all red but the 4th line, the one to the left hand crank bearing is only showing red oil approx 20mm past the splitter, the other lines are fully filled with red, does anyone know if it is normal for the left bearing feed line to take longer for the oil to travel through it?, I know it only feeds that 1 bearing, whereas the other crank oil line feeds the 2 centre bearings, even so it seems to be taking a long time for the red oil to travel along this line, any advice would be very much appreciated, thanks Mark.

[Alan H]

Have a look on 2T forum, there's a couple of replies.

[joethebike]

I think the centre crank bearings are feed by the gearbox oil. Perhaps the slow left side oil line has a stuck check valve.

[karl pa]

I think the centre crank bearings are feed by the gearbox oil

The early 250s used gear box oil for the center main bearing, the A and B used 2 stroke oil to feed the 2 center main bearings. After the 75 M the 250 engine went through a design change for the 76 A model.

[Mark9]

Thanks all, got it sorted, put some replacement LH oil lines on.

Hi Alan:-)