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I am having trouble getting the primary set up on a shovel, and would appreciate if anybody has some insight into this.
I have a 66 FLH frame on the bench. It has a 73 motor, 4 speed box and a 70-78 primary.
The transmission case is an STD aftermarket. Motor and inner primary are OEM.
My issue is the clutch hub runs too close to the middle of the bike and makes the belt rub against the sharp edges of the starter gear.
I fitted an aftermarket inner primary when the bike was reassembled after a paint job, and motor/transmission rebuild. The bike ran fine for many miles until it was worn out.
To get the primary to work, I have to grind off the inner lip where the inner primary bearing seats against. The primary pullies are lined up parrallel, but offset by about 1/4". The belt was destroyed in quick time. I got the bike back and have been trying to figure out where this offset is coming from. I sourced an OEM inner primary, early one without the stregthening ribs. When I present this to the gearbox, the clutch hub rubs on the inner bearing boss, the same as the aftermarket one.
The mainshaft is the correct one for this system, 12.470" long.
It looks like the shaft needs to be 1/2" longer, but not as long as the rear belt mainshaft.
The only conclusion I have left is that the STD transmission case doesn't set the mainshaft out far enough. It may be this case is for a 67-69 electric start generator motor, but I don't have any measurements to compare it against.
I have no faith or knowledge that this STD case is the one from the bike before the rebuild.
Is it possible this is a rear belt drive case with a rear chain mainshaft and inner primary?
Has anybody come across this before?
Cheers
20200106_104535.jpg
Orange mark is the back of the clutch hub.
I have a 66 FLH frame on the bench. It has a 73 motor, 4 speed box and a 70-78 primary.
The transmission case is an STD aftermarket. Motor and inner primary are OEM.
My issue is the clutch hub runs too close to the middle of the bike and makes the belt rub against the sharp edges of the starter gear.
I fitted an aftermarket inner primary when the bike was reassembled after a paint job, and motor/transmission rebuild. The bike ran fine for many miles until it was worn out.
To get the primary to work, I have to grind off the inner lip where the inner primary bearing seats against. The primary pullies are lined up parrallel, but offset by about 1/4". The belt was destroyed in quick time. I got the bike back and have been trying to figure out where this offset is coming from. I sourced an OEM inner primary, early one without the stregthening ribs. When I present this to the gearbox, the clutch hub rubs on the inner bearing boss, the same as the aftermarket one.
The mainshaft is the correct one for this system, 12.470" long.
It looks like the shaft needs to be 1/2" longer, but not as long as the rear belt mainshaft.
The only conclusion I have left is that the STD transmission case doesn't set the mainshaft out far enough. It may be this case is for a 67-69 electric start generator motor, but I don't have any measurements to compare it against.
I have no faith or knowledge that this STD case is the one from the bike before the rebuild.
Is it possible this is a rear belt drive case with a rear chain mainshaft and inner primary?
Has anybody come across this before?
Cheers
20200106_104535.jpg
Orange mark is the back of the clutch hub.
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