[twinsisin]

Was going to change the oil on the STR until I realized I have everything but the washer. Anyone know the size of these? Want to see if Amazon sell them. I thought they were supposed to come with the oil filter but mine didn't.

Sometimes the dealer includes the washer and charges you for it.

It is a common 14mm ID aluminum drain plug washer available at almost every auto parts store.

 

[twinsisin]

I actually had a problem with the standard crush washers from the auto parts store on my 2016 R. The threads on the drain bolt didn't go all the way to the flange, so when I tightened the bolt, it was running out of threads before it got really solid contact with the crush washer. The torque on that oil drain bolt is only 25Nm, and I think I was reaching that value with the threads just ending, not with the flange of the bolt really contacting the washer very well. It looked OK, but it very slowly dripped oil. Like one drop every day or two. Who knows whether I lost any while riding, but the oil was never low, just an annoying oil spot on the garage floor.

The genuine Triumph washer is 3mm thick, vs. 2mm for the generic ones that I had, and that solved the problem. I've always wondered whether that was deliberate engineering on Triumph's part, to force me to buy their genuine Triumph crush washer, or just a manufacturing tolerance issue on the bolt on my bike.

The Triumph washer is 14.4mm ID and 3mm thick and so are the quality washers, like Doorman, at the auto parts stores.

The cheapest washers seem to be exactly 14mm ID and thinner. That's the difference.

 

[twinsisin]

And that's probably my problem. I'm a retired accountant, so naturally I bought the cheap ones. Oh well, live and learn. I did pick up a bunch of the Triumph ones last time I was at the dealer, but when I run out, I'll definitely look for the good ones at the auto parts store. I like to support my dealer, but they're quite a ways from me, so for small stuff, it's the auto parts store for me.

Thanks for the info.

Nothing wrong with having a few Triumph filters and washers on the shelf... I like my dealer too.