Nothing exciting, just started stripping the spare SPR motor to see what it's like on the inside. It's a low km engine (6000km) that looks to have never been apart so I'm hoping for nice barrels and crank. It's been stood in the closet for the better part of 10 years, probably a while in japan as well. Last time this engine was a feature we were on the old old forum still..
So here are a bunch of pictures of the engine coming apart:
Plumbing anyone?
On the stand:
The whole thing is very dirty, which actually saved the ally from oxidation. Some rust though:
These heads don't look like they have ever been taken off:
Something I've noticed on other engines as well, the 2 crankcase halves have markings on them. Has to be done by the factory to mark matching cases maybe?
Heads off, both look like this:
Just dirty with no damage.
Barrels:
Both barrels appear OK, hard to get good pics but the cross hatching is actually good.
Looks good, the marks are just carbon:
and the other one:
So far it matches a 6000km engine I'd say.
Clutch plates out:
Next up, the countershaft sprocket that looks married to the shaft:
The junk looking tool for the job
:
4 whacks and the nut happily gave up its hold:
This impact driver really works well, looks and feels like cheap junk (was very cheap) but it's removed every nut its come across. This is the first 3xv engine that still has that little plate behind the sprocket?
The flywheel nut also quickly disposed of:
Clutch hub nut gone:
This one actually needed 1 more whack than the sprocket.
The dry clutch has a few more bits and seals than the wet clutch:
Interesting on the later motors Yamaha seems to have switch to a different black case sealant:
Popping off the crank cover things seem to look OK:
Big ends look OK but you never know until its been pulled apart. Of all the cranks I?ve only ever had one whose pins weren?t pitted. Centre seal has a bit of a rough spot.
I'll put this one away for a later day:
I'll box the engine up for a later day, this time storing it a bit better. I'll pull the gearbox from this one as my other SPR has the tall first gear which is not much fun on the road.
And just for interest, I found out Yamaha sells 'OEM' loom tape to repair your wiring loom. Ordered it just for the hell of it and you get 6 rolls, pretty cheap too. These are supposedly better than ordinary electrical tape for your loom?
That's it. Just a few more hundred years then I'll be done
