Personally, I think they are a bit short, I'd go for something a bit longer. The start of the tank thread is set back into the tank by a couple of mm. Add a copper washer and you'll only have a few mm of the screw engaged in the tank thread.
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I used copper washers under each screw head, can be seen in the picture. I annealed them before use so they're nice and soft, hopefully they won't leak. I'll know very soon.Don't forget to include the sealing washers for the bolts or you are going to have a leak.
I've found the ones from Yamaha work best and can be ordered directly from your local dealership.
The aftermarket sealing washers I've used have been junk and were prone to disintegrating on install.
Once everything is buttoned up, it is also worth testing how well the petcocks hold fuel with the tank off the bike (don't ask how I know
copper will not do that job.
Really? I'm all ears, why not annealed copper washers? I can change the ones I used if I need to. Thanks.+1 on the OEM amalgram washers, failing that find doughty washers?
and maybe some members have used them with no issues, I just prefer not to gamble.
Thanks, that's good to know. I'll look some up.
like they say just not soft enough.
Thanks. I did anneal the copper before use. So I'll give it a go as it is to see. But I've looked up the Yamaha washers and they're readily available if I need some. The Yamaha application list for those washers is huge. I doubt they'll go unavailable anytime soon.
I have actually polished the tank surface under the petcocks. The tank has been cleaned and sealed internally, it's good to go. But I don't want there to be any traces of paint on the surface of the tank where the petcocks are fitted.
