April 30, 201610 yr Could anyone tell me what gearbox oil and how much it should take for my 2014 300. Thanks
April 30, 201610 yr Author Only info i can find is for 2012 Transmission oil: 400 cc, type GEAR TRANS 0W75 Thanks for that. That's what I've been putting in just seen to spit a little out of the breather pipe that goes up to near the head.
May 2, 201610 yr Thanks for that. That's what I've been putting in just seen to spit a little out of the breather pipe that goes up to near the head. It isn't uncommon to loose a small amount of gearbox oil through the breather. I haven't a clue why! My friend (who also has a JGas) has the same problem and thinks it may be down to changing atmospheric pressure!
May 6, 201610 yr Common causes of oil coming out of Gearbox breather are: Overfilling - oil is too high up the gears and gets churned into a foam which greatly increases its volume. This is supposed to result in insufficient lubrication and gearbox damage but I have never seen conclusive evidence of that on a trials bike gearbox. Leak from crankcase, either poor gasket joint between crankcases or a porous casting. On Gasgas pro I think using the wrong (undrilled) screw to hold the clutch on can also cause it.
May 24, 201610 yr This happens on the JGas when the bike is left leaning to the left for a time. If the bike is upright or leaning right it doesn't happen. Breather hole must be pretty close to the top of the oil level or something like that. First noticed this when tying bikes in to the van in 2012. Learn't quickly to lean them the other way!
May 24, 201610 yr I have used this breather screw to replace the filler plug and a blind rivet goes into the original breather outlet. Works well. http://trialparts-shop.de/en/. Stops capillary action up the original breather tube if any transmission oil gets into the breather as it is very close to top of transmission oil level.
October 2, 20169 yr I've been struggling with my brand new 2016, 280 clutch. I am not certain what oil was in the bike from the distributor, but the clutch has slipped so badly it has been unrideable. I recently drained the original oil after about 4 hours on the bike and tried ATF, Dexron III, but doesn't seem much better. Maybe this should be more of a tranny flush circuit and try again after another warm run on the engine. Has anyone else struggled with their clutch right from the crate? Am I missing something obvious?
October 2, 20169 yr Is there free play at the clutch lever ?The ball end of the lever wants to move about 3mm before it operates the master cylinders piston .If this is ok take it back ,it's nothing to do with the oil
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