oil on the good foot

[speedlimit85]

Yea. Bullfrog was nice enough to try and measure with the seal in there and "well there's your problem, glad we solved that."

My mechanic friend's idea may be ok but I will trust your practical engineering.

[DEEBS11]

Speed, solder, oil and heat & vibration do not mix. That being said, let's take one step back. How was your crankshaft end measured accurately with the seal installed? Did the mechanic use a vernier caliper or a micrometer? The seal would have had to been removed in order to measure the crank end with any accuracy. It needs to be measured right where the seal lip (inner) resides on the end of the crankshaft.

[speedlimit85]

The crank end is off slightly. Probably was off the life of the bike but the seal was working anyway- better quality. I just ran into a mechanic friend who has a crazy old school repair idea. Remove the sleave. install a new speedi sleave . Then put the bike on its side somehow with the crank vertical. Put dry ice in there. Soldering gun against the crank, solder into any space and the ice will pull it through to fill all gaps and make it round. Then check with the seal to eyeball if it looks right and if not start over. Then install the seal and ride into the sunset...

[bikerphil]

So how can that be possible? Is it the sleeve that he measured that is out of round?

[speedlimit85]

Well, Phil, you were close to right. Instead of a wobble, I have an egg.

I rode into the country to a bike shop today. They let me take it apart and show them the seal. The seal looked good. Then Bullfrog measured the end of the crank and it's an egg shape.

[DEEBS11]

And a page on installation of seals.

[DEEBS11]

Here is how the part numbers from one company are laid out. For a 32mm x 48mm x 7.8mm (stock) I figured the part number would be R-B2-1.889-1.259-0.307-(blank space)-SS-V-L for the exact seal. Measuring 48MM = 1.889" and so on....

[speedlimit85]

Exactly. That's the problem. The correct replacement seal is available for the right side and Yamaha is listing it for both sides.

Our only choice may be what we have. I am getting 2 of the same seals you are.

Could we ask Yamaha to make a 48 mm replacement seal for the left side?

[DEEBS11]

I'm not sure one will work on both sides. One has an I.D. of 48mm and the other 45mm. I think that will only fit the 45mm side (right side alternator).

[speedlimit85]

The other side has lines going the other way. I got this one from yamaha. It is the replacement seal on the phish for both sides

[DEEBS11]

There is possibly more to this seal issue than an off the shelf 32x48x8 size. Material & design of the original part must be taken into account. It's very possible that there was nothing really wrong with your installation that lasted 10,000 miles or mine that lasted 7,000 miles. I think a badly installed seal will leak right away. The issue could be seal design and material. There are directional seal designs and specific materials that come into play. Our replacement seals were possibly good but could have simply wore out quick from friction and heat and possibly directional rotation.

https://rlhudson.com/wp-content/uplo...seal-guide.pdf

https://www.clarkseals.com/pdf/shaft-seal-catalog.pdf

[speedlimit85]

You can also use a micro file and file a groove. You DO NOT want to file all the way to the crank, just a score lineit can split along.

That may be possible. How do I know if it needs to be removed? I would then need to install another, right?

https://www.oreillyauto.com/detail/c/precision/engines---transmissions/engine-gaskets/crankshaft-repair-sleeve/50e53f946587/precision-repair-sleeve/ope0/99128?pos=10

yamaha seals:

https://www.partzilla.com/product/ya...eeb19b62f81350

https://www.cmsnl.com/products/oil-seal-32x45x65-2h7_9310132144/

Other side replacement seal looks directional.

Phil's is working and mine was, the seals we are using are good steel with high temp rubber (bi-directional I think).

https://www.oringsandmore.com/oil-sh...-ref-cr563065/

https://www.oringsandmore.com/fkm-oi...rice-for-1-pc/

[Schming]

an arrow on the original...yes...hmmm

Are the seals your using directional ? If not I'd bet that's your longevity issue.

[Schming]

The seal is 32x 48 meaning there are less than 16 mm to fit a dremel without cutting into the case. Is that available or possible?

You can also use a micro file and file a groove. You DO NOT want to file all the way to the crank, just a score lineit can split along.

[DEEBS11]