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Hey,

I have an oldschool mc19 (1989)
Im going to change oil tomorrow and have a new filter with new seals for the filter and plug. I feel confident with that part.. BUT

With the other bolt... the Sump plug.. Ive heard that it also needs to be replaced once its been drained otherwise oil will leak? And others disagree.. does anyone here know for sure?

And im wondering if I should use the 10/30 oil or 10/40.. I dont know :/

Thanks!

(Reason why Im changing is because the bikes gears have been sticky/crunching and i keep getting stuck in neutral/limbo when changing from 1st to second and so on... Ive actually had to pull over just to click the bike back into gear because its slipped)
Hoping new oil and tightening chain will fix this....
 

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never had to replace mine

think this may be in regard to a copper washer on the sump plug

if it is damaged then replace it - but after 5 or so oil changes and ownership for 3 years - never had an issue with reusing it.
 

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Same here.
I've got a Z1000 that I bought new in 2010, change the oil every 6K, done 56K now & never changed the aluminium washer. Doesn't leak.
 

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^Exactly. Just dont get all antsy about it leaking and overtighten it. You'll strip the thread on the aluminum sump and you'll be in all sorts of shit.
 
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