06-27-2015, 11:55 AM
Hi Tom
I had to dig into old drawings to find this one, but the gear train remains the same.
The centre gear pined to the crank drives the 5 intermediate gears at 1-1 ratio. the secondary gears are cut in one piece with the shafts. the small timing pulley is pinned and locktited to this shaft. the belt belt ratio up to the cam is 2-1 .
The camshaft is one piece ( as in my horizontal engine ) fixed to the pulley with a end nut and 2 pinch screws allowing the valve timing to be set . ignition timing is set by rotating the end of the cam pulley cover that will have a hall effect sensor located in it.
I cant get a 2-1 ratio on the gears inside the case because the larger gears will overlap each other if the number of cylinders had been even it is possible to go one in, then one out, but with 5 gears you end up with two gears wanting the same space
Brian.
I had to dig into old drawings to find this one, but the gear train remains the same.
The centre gear pined to the crank drives the 5 intermediate gears at 1-1 ratio. the secondary gears are cut in one piece with the shafts. the small timing pulley is pinned and locktited to this shaft. the belt belt ratio up to the cam is 2-1 .
The camshaft is one piece ( as in my horizontal engine ) fixed to the pulley with a end nut and 2 pinch screws allowing the valve timing to be set . ignition timing is set by rotating the end of the cam pulley cover that will have a hall effect sensor located in it.
I cant get a 2-1 ratio on the gears inside the case because the larger gears will overlap each other if the number of cylinders had been even it is possible to go one in, then one out, but with 5 gears you end up with two gears wanting the same space
Brian.
