Rick, my helmet's off to you! That is a major
undertaking to say the least. Thanks for the pics.
They are a valuable for reference.
Can't wait to hear about
your power report when finished and broken -in.
-Pete
- Rick Davids <[EMAIL PROTECTED]> wrote:
> The engine had only 30k miles.
>
> It's kind of a long story.
> Basically what happened is I took it to my local
> Yamaha shop for them to
> adjust the valves. They reported that the #3 cyl was
> way down on compression
> (something like 120, should be 190-200). They
> claimed to have done a
> leakdown test and said they thought a ring job would
> cure it. Probably all
> lies. They took forever to do it and then did a
> horrible job. When I got the
> bike back it was burning oil at the rate of about a
> quart every 500 miles.
> Plus it was way down on power. Dynoed at 70 hp. Top
> speed down to 120 from
> 140 or so (Not that I run at 140 very often, but
> it's nice to know I can)
>
> Anyway, the shop sucked so bad , a bunch of lying
> thieving bastards that
> could give a f about me or my bike(Pacific Yamaha in
> Harbor City,
> California). So I decided to do the job right by
> doing it myself.
>
> I wanted a minimum of down time so I just decided to
> go ahead and cover all
> the bases. I ordered new pistons/rings valve seals
> and started the job when
> they arrived. As long as I had it all apart I
> decided I might as well get a
> pro valve job done as well (did the poor mans test
> when I got the head off.
> Poured solvent into the ports. Some of the valves
> were leaking pretty fast).
>
> It probably would be a bit easier to work on if I
> removed the whole engine,
> but not really worth the extra work. Not too bad
> leaving the crankcase in
> the frame. I did have to unbolt the front shock to
> get the head off because
> one of the exhaust studs was hitting on the top
> shock bolt when trying to
> remove the head.
>
> Anyway, it's a big job but nothing has been
> particularly difficult. I'm
> probably taking about 5 times longer than a pro
> would take. At least when
> I'm done I'll know that the guy who did the work
> really cared about doing a
> good job.
>
>
>
>
>
>
> >
> >Rick, how many miles were on engine at time of
> >teardown? What kind ok wear did you find?
> >Was it better [easier] to leave crankcase still
> >in frame to do your work? Thanks.
> >-Pete
> >--- Rick Davids <[EMAIL PROTECTED]> wrote:
> > > Yup,
> > >
> > > New .5mm os pisons/rings. appropriately bored
> cyls,
> > > valve job.
> > > Just got the cylinders back on last night. A bit
> of
> > > a bitch, but not quite
> > > as difficult as I was expecting.
> > >
> > >
> > > > Sweet Jesus!! Rick, tell us about your
> rebuild!!
> > > Looks like you either
> > > > cleaned up or replaced the pistons, valves,
> rings
> > > and sleeves?
> > > >
> > > > Kevin Hawkins // Greensboro, NC
> >
> >
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