January 18, 20197 yr I picked my new-to-me Evo 250 yesterday and just spent a couple of hours in the garage with it. Unfortunately I won’t get out to play tomorrow as planned because the air filter was filthy and has to be washed and re-oiled. Then while continuing the general check over, I found the gearbox sprocket was sloppy on the splines. Is that to be expected?
January 18, 20197 yr I don`t recall mine as sloppy, but I have gone 10,9,10,11 and back to nine. So five sprockets on a 2016. It could also just be the brand.
January 19, 20197 yr I think it has the ability to 'float' transversely which helps keep it centred but if the sprocket can move through the direction of rotation whilst the shaft stays still then you possibly need a new sprocket,
January 19, 20197 yr Dry the filter out on a radiator (or even use a hairdryer) and get out tomorrow! Let us know how it goes. Edited January 19, 20197 yr by 2stroke4stroke
January 19, 20197 yr Author 2 hours ago, 2stroke4stroke said: Dry the filter out on a radiator (or even use a hairdryer) and get out tomorrow! Let us know how it goes. The filter is now dry, but looking pretty ratty so needs replacing. Anyway the bike is now in so many pieces that riding this weekend is not an option. I’ll take a more careful look at the splines on the output shaft this evening, hoping to find them all good. Then I’ll continue going through checking and cleaning everything, and hoping no other nasties crawl out of the woodwork. The dealer I bought it from is being good, so I’m confident he’ll provide a new air filter and sprocket. I just have to hope a sprocket change solves the problem.
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