This is the engine and frame that I got from Retro Randy. It seems to be a low mileage motor that had run long enough to get the oil dirty.
It's got the accelerator pump carbs and the small oil filler hole so an enthusiast owned it sometime in it's history. I'm needing a spare motor so I began by pulling the flywheel to give it the peened bolts on the starter clutch. I gave the flywheel puller a 50 ft/lb preload and then smacked the push bolt with an 8 lb sledge and it came loose the first hit. I think a big hammer is the most important part of getting the flywheels loose, 1 smack and it's done.
The three bolts were tight and the end of the threads were center punched at the end of the thread. I'm going with our long and peened bolt at the shop tomorrow. Then a shim check while it's on the bench and it should be ready for installation in Hussein for an iron butt ride I'm getting ready to do.
The starter clutch bolts had been center punched on the exiting thread. With my hand next to the rachet head a slight twist of the wrist turned them all out.
I cut new bolts to 14.3mm and then center drilled the ends with a center drill about 1/8 inch deep. Tightened the bolts to 40 ft/lbs and then pounded a center punch right down the hole. The ends flared out and locked the bolts.
I'm glad I checked, this flywheel and clutch are otherwise brand new. I think this is a really low mileage motor.
;)
Coil
Well the valve train looks good, I checked all of the clearances and they are between shims so no changes were needed.
The YICS box leaks between cylinders so I split it. It had no gasket, just a glued groove and it was obvious that the cylinders had been leaking back and forth. I'm going to sand the two pieces flat on the belt sander and then assemble with "The Right Stuff". I did that on #3747 and its not leaking for 6 months so far. 3747 had the gasket type, though.
I pulled the carbs so I can clean the bowls and inspect them tomorrow. The float drain "T" is broken so I need to check with the dealer for one.
;)
Coil