Crankcase Soda Sandblasting

These are pictures of the bottom crankcase after I used Baking Soda to sandblast with. Its amazing how it does a great job, without leaving any pitting in the allumium casing. Its also very easy to clean off by just using either fuel, or water.

Notice the serial number "22T-100313". This means its a canadian manufactured bike, and was the 313th off the assymbly line in 1983.

This is the upsidedown view of the bottom crankcase. The circle is the OIL FILTER housing, which is in the front of the bike.

This shows where the OIL PAN is mounted.

The next procedure will be to measure the cylinders to see if they are within specs for only a honing, or a boring will be needed from the machine shop.

Crankcase Rebuilding

This week I took the crankcase apart piece by piece. Started with the clutch assembly and shift gears, then the generatot. I then removed the remaining crankcase bolts inside the crankcase.

I was surprised to see the top and bottom crankcase appart after only a few rubber hammer "HITS"!

This is the Oil Pan, after I BUFFED it completely!...LOOKS GREAT!

This was the clutch. I measured the specs, and its still within reason. It was quite STICKY when removed.

CRANKCASE APPART!.....WOWWWWW

Attached are the pictures........

Carburators removal and rebuild

These are the 1981 Seca 750 carburators in which I removed to rebuild. They were actually in working order with the engine, however VERRRY DIRTY!

These will replace the ORIGINALS on the 1983 Midnight Maxim 750, which were completely seized! I believe caused from the carburators being already removed from the engine and exposed to humidity during storage outdoors.

They needed to be completed taken apart and rebuilt.

These pictures will help me put them back together also.........

Purchase of used 1981 SECA XJ750

I happened to see a used 1981 Seca XJ750 for sale with only 32,000KM on it. I decided to go see it, and it turn out that the engine started, however it could not  keep its idle when cold. Seing the engine was good, I purchased the motorcycle for only $300 Canadian!

When I brought it home in my garage, I started right away to take it apart. Within 24hrs, I had the engine pulled out. One thing I found, was 2 BOOTS,between the carburators and the Intake, were cracked, which would explain the reason why the engine would not keep its idle when cold.

This is the crack that made the bike stall when idling when cold.

The engine while still in the frame.

Hard to believe the engine is out!

This will make a nice parts bike for my 1983 Midnight Maxim engine!

I will sell some of the parts on EBay to recover some $$$.