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After a 20 year rest, I brought the 37 U back to life. It was my fathers machine, and he had taken the tins off to repaint and then, got another bike that intrested him more and never finished the 37.
The 37 has new points/ condensor, battery,carb maticulously done up by Dad, durable float,new 386 plugs,intake manifold seals disassembled, cleaned, anti-sieze threads,reinstalled, leak checked, new carb to manifold gasket, and timing set to full advance showing the mark in the center.
Starts easily, and when the engine warms and choke is off, the low speed needle can be adjusted so the front cyl runs smoothly, and the rear chugs and only fires every eight or so turns, (like an old hit-or-miss),,,,
OR- turn the needle IN and the front cylinder pops and skips while the rear cylinder runs smooth.
I checked the rear cylinders valve adjustment and found them ok, then ckd the front, and the intake had clearance but it was less than .006, so now its set correctly.
After that last adjustment, the mixture screw was readjusted untill the front cyl stopped poping, and the rear did continue to run without seeming too rich, but 2 clicks in and front pops, 2 clicks out and rear blubbers....
Then the cold beer started tasting real good and the tools got wiped down and hung up for the day.
At this point, I am not sure what I will do to help the old gal idle any better, so I am open to sugesstions and am calling on the wisdom of any and all who are graciously interested in giving me advice.
Steve C
The 37 has new points/ condensor, battery,carb maticulously done up by Dad, durable float,new 386 plugs,intake manifold seals disassembled, cleaned, anti-sieze threads,reinstalled, leak checked, new carb to manifold gasket, and timing set to full advance showing the mark in the center.
Starts easily, and when the engine warms and choke is off, the low speed needle can be adjusted so the front cyl runs smoothly, and the rear chugs and only fires every eight or so turns, (like an old hit-or-miss),,,,
OR- turn the needle IN and the front cylinder pops and skips while the rear cylinder runs smooth.
I checked the rear cylinders valve adjustment and found them ok, then ckd the front, and the intake had clearance but it was less than .006, so now its set correctly.
After that last adjustment, the mixture screw was readjusted untill the front cyl stopped poping, and the rear did continue to run without seeming too rich, but 2 clicks in and front pops, 2 clicks out and rear blubbers....
Then the cold beer started tasting real good and the tools got wiped down and hung up for the day.
At this point, I am not sure what I will do to help the old gal idle any better, so I am open to sugesstions and am calling on the wisdom of any and all who are graciously interested in giving me advice.
Steve C
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