Thanks Bob and Roostius.
So are you saying that crank case half with the cracks may be serviceable? If so, that is awesome!
I am doing a full bottom end tear down also.
All parts are going to be inspected to ensure compliance with service limits, and I'll replace what I need to.
I was planning on testing (at least) case halves, conn rod, and water pump impeller with penetrating die.
What other parts should I be testing for cracks?
All salvageable parts are going to be cleaned with degreaser and then ran through my dishwasher before deburr and glass bead or zirblast, then they will be unltrasonically cleaned before assembly. This is why I was not very concerned about debris from gaskets/dirt.
I am going to replace all the bearings in the case halves, and all seals/washers/gaskets while I'm at it.
I will be reconditioning hardware as well (red wheel buff to remove corrosion, glass bead blast, ultrasonic clean) and will buy new hardware where ever I need to.
I can see some daylight through the reed valve so I was planning to replace that - I was looking at the Boyesen rad valve as a replacement, not sure if this would be a good upgrade for what I want to to with the bike. And any advice is welcomed!
I plan on installing a fresh new clutch pack, probably OEM as I'm hoping to re-use the stock basket (if its serviceable) and I've heard the carbon and kevlar discs tend to wear the stock baskets pretty quick.
This is for a super moto build, which I plan to plate and ride primarily on the street.
I would like to build the engine for good reliability and longevity, without sacrificing a lot of performance.
I'm looking at the pro racing "cool heads" and then I would like to find someone to tune the head and cylinder for my application.
I was thinking maybe lower compression a little and raise squish zone a little, try to make more street friendly and and get a little longer maintenance intervals.
I only have a BASIC understanding of the concepts of 2-stroke tuning, so I will be farming this work out.
Roostius, I've seen other posts from you about this kind of work - expect a PM from me in the near future
![Wink ;)](./images/smilies/icon_wink.gif)