Spring and Things
The rear cylinder bore cleaned up much sooner than the front cylinder, clean size is 3.326" rear 3.334" front. The next decision is weather to match the bores or run two different size pistons. With the scarcity of matching 1912 cylinders mismatch pistons sounds just fine even if it is only .008" . A call to CP pistons will determine final bore sizes. The finished bore size is ultimately determined by the ring manufacturer.
Last night was a late night programing setting up and making three prototype coaster parts on the Okuma . Once completed with that task a trip to the spring shop was scheduled.
Off to the spring shop for a spring curling marathon to accompany the coaster part of the coaster hub. These compression springs (.03 wire,7/32 OD X 3/8 long) will be part of the friction device that assist the coaster to slide left,right. Bill twisted the springs faster than Timothy Leary can twist up a .......oh slipped . Another fine job by the guys at McGuire spring.
Afterward a trip to the east side to see a customer , followed by a trip to the shot peen shop where my connecting rod set was treated to stress relieving surface shot blast.
Rod races , bearings , cages , and a modifiable big twin crank pin ordered and should be in next week . Many of the motor parts are coming together while working on the coaster hubs. Careful preparation of all the pats should cause for an assembly marathon in the not so distant future .
On to the other project, Knucklehead heads are troubling. I have late model rocker tins and need the early style that have the offset to clear the rabbit ears casting shoulder. A set my have been located , stay tuned.....
joe
The rear cylinder bore cleaned up much sooner than the front cylinder, clean size is 3.326" rear 3.334" front. The next decision is weather to match the bores or run two different size pistons. With the scarcity of matching 1912 cylinders mismatch pistons sounds just fine even if it is only .008" . A call to CP pistons will determine final bore sizes. The finished bore size is ultimately determined by the ring manufacturer.
Last night was a late night programing setting up and making three prototype coaster parts on the Okuma . Once completed with that task a trip to the spring shop was scheduled.
Off to the spring shop for a spring curling marathon to accompany the coaster part of the coaster hub. These compression springs (.03 wire,7/32 OD X 3/8 long) will be part of the friction device that assist the coaster to slide left,right. Bill twisted the springs faster than Timothy Leary can twist up a .......oh slipped . Another fine job by the guys at McGuire spring.
Afterward a trip to the east side to see a customer , followed by a trip to the shot peen shop where my connecting rod set was treated to stress relieving surface shot blast.
Rod races , bearings , cages , and a modifiable big twin crank pin ordered and should be in next week . Many of the motor parts are coming together while working on the coaster hubs. Careful preparation of all the pats should cause for an assembly marathon in the not so distant future .
On to the other project, Knucklehead heads are troubling. I have late model rocker tins and need the early style that have the offset to clear the rabbit ears casting shoulder. A set my have been located , stay tuned.....
joe
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