doctorchopper Posted December 29, 2019 Report Share Posted December 29, 2019 60:1 might be a bit rich as well, i think most people run 80:1 Quote Link to comment Share on other sites More sharing options...
miner Posted December 30, 2019 Author Report Share Posted December 30, 2019 Manual says 50:1 but I just run the same 60:1 I mix up for the 300 EXC. Quote Link to comment Share on other sites More sharing options...
richt Posted December 30, 2019 Report Share Posted December 30, 2019 The pre-Pro models ran 50:1 as the fuel mix lubed the main bearings. The GG has a few mistakes in it. Pro models use the gearbox oil to lubricate the main bearings so less is required in the fuel mix. I run mine at 70:1 with a good synthetic 2T oil and its never fouled a plug. 1 Quote Link to comment Share on other sites More sharing options...
miner Posted January 1, 2020 Author Report Share Posted January 1, 2020 Still using a little gear oil but not smoking yesterday, bike felt good, throttle response was ok, good bark but probably a centre box/silencer full of sludge. Steamed out a couple of times without the fan coming on whilst rock crawling, after that it was fine, assume it was air locked. Mrs is woring tomorrow so will go for a hangover buster in the morning... splash of fuel, oil and coolant and should be good to go. On the plus side... felt much better yesterday, months of layoff coming good with reactivated muscle memory... cant bring myself to strip it yet... want to ride it. Quote Link to comment Share on other sites More sharing options...
richt Posted January 1, 2020 Report Share Posted January 1, 2020 If it still uses gear oil then keep a check on the breather near the front sprocket. it can only blow it out, leak it or burn it. 1 Quote Link to comment Share on other sites More sharing options...
miner Posted September 15 Author Report Share Posted September 15 Fast forward some time… 😅 The stripped it down 2yrs ago and it lay in bits for most of that time. Rebuilt it a couple of months ago. I lay the clutch side engine casing on its side and filled it up with gear oil and put some paper towel under it and left it overnight. No leaks. Inside the main bearing ID there’s a viton o-ring which I assume wears over time. Took it out and measured it, got one from a supplier and replaced it. All good. Replaced the gearbox bearings, running a bit quieter now, most of them rough to turn with your finger. Main bearings and the stator side shaft seal ok too. New piston rings and gaskets, running well now. Quote Link to comment Share on other sites More sharing options...
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