tombo46 Posted October 9, 2007 Report Share Posted October 9, 2007 Can anyone advise me on the best gearbox oil to buy? and also what to flush the old oil out with? some people say to run the engine with the flushing fluid in it for a bit, is this even safe? All the best Tom Quote Link to comment Share on other sites More sharing options...
amiller Posted October 9, 2007 Report Share Posted October 9, 2007 Why does it need to be flushed? Do not run it without gear box oil! Aaron Quote Link to comment Share on other sites More sharing options...
tombo46 Posted October 9, 2007 Author Report Share Posted October 9, 2007 i figured it would be best to flush it to get the amount right, also its not good mixing 2 types of oil, I dont even know if the old oil is synthetic or not. Tom Quote Link to comment Share on other sites More sharing options...
scraggydog64 Posted October 10, 2007 Report Share Posted October 10, 2007 I was told by a mechanic of some repute, who specialises in trials bikes to flush out using the petrol /oil mix I put in the tank. I had second thoughts about this when I got home so I used kerosine though I am sure diesel or parafin would do the same job. I have flushed a number of gear boxes for various reasons and and had no problems afterwards. Whatever you use though when you run the engine do not put the gearbox under any load. Quote Link to comment Share on other sites More sharing options...
amiller Posted October 10, 2007 Report Share Posted October 10, 2007 If you feel you must flush the tranny go for it but.... If you have ever had a motor apart you would notice that unless you pull the clutch apart you will not flush all the old oil out of the motor. All sorts of oil will remain in the clutch plates so you will be mixing oils anyway. Now the clutch plates need the oil to function properly. Getting some cleaning solution in the plates along with oil can actually cause the clutch to work improperly. Aaron Quote Link to comment Share on other sites More sharing options...
tombo46 Posted October 10, 2007 Author Report Share Posted October 10, 2007 ill just leave it to drain itself then, cant hurt it. what oil is best? Tom Quote Link to comment Share on other sites More sharing options...
amiller Posted October 10, 2007 Report Share Posted October 10, 2007 Ipone Box II if you can get it. Quote Link to comment Share on other sites More sharing options...
tombo46 Posted October 10, 2007 Author Report Share Posted October 10, 2007 Cant find it anywhere! do you know of a more mainstream oil that i could use? Thanks for the help, really appreciate it! Tom Quote Link to comment Share on other sites More sharing options...
scraggydog64 Posted October 11, 2007 Report Share Posted October 11, 2007 I use PJ1 75w light clutch tuner Worked well in all the bikes we've had. Gas Gas, Beta, Sherco, Montesa 315. Ask your local dealer, they will advise. Quote Link to comment Share on other sites More sharing options...
amiller Posted October 11, 2007 Report Share Posted October 11, 2007 Elf 75wt fully synthetic. Quote Link to comment Share on other sites More sharing options...
tombo46 Posted October 11, 2007 Author Report Share Posted October 11, 2007 I use PJ1 75w light clutch tunerWorked well in all the bikes we've had. Gas Gas, Beta, Sherco, Montesa 315. Ask your local dealer, they will advise. Is it the "Two stroke gear oil - light 75w - 1 litre bottle" on this page that you mean? http://www.bandcexpress.co.uk/cgi-bin/bc_page.pl?cat=PJ-LUB just checking before I go ahead and buy it hehe. Thanks alot. Tom Quote Link to comment Share on other sites More sharing options...
fkrisztian Posted October 18, 2007 Report Share Posted October 18, 2007 (edited) I think it's not recommended to use fully synthetic oil in the gearbox, because sometimes the clutch will slip. The synthetic oil is very "slippery". I think that a mineral oil would be better. Edited October 18, 2007 by fkrisztian Quote Link to comment Share on other sites More sharing options...
amiller Posted October 18, 2007 Report Share Posted October 18, 2007 Not so much true. Aaron Quote Link to comment Share on other sites More sharing options...
tombo46 Posted October 19, 2007 Author Report Share Posted October 19, 2007 its in the bike and feels fine so far =] gear changes are alot smoother and havnt noticed any slipping of the clutch. thanks alot =] Tom Quote Link to comment Share on other sites More sharing options...
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