Building a two cylinder 50cc Honda.

The twin project is sponsored by:

Sponsored by Daxshoppen.dk

SS50 based twin. This is a low- budget project! Aiming at getting the right sound for a classic fifty Honda racebike. There are other approaches of reaching that goal, and certainly better ones - following shows my way of reaching above goal - without having to sell my kid or something!
Based on the CD50/ SS50 housings and as many Honda parts possible, some specs here:

OHC, chain driven twin:
Bore : 35mm
Stroke: 26,5
Transmission: 6speed

Honda twin 6 speed conversion.

Left crankcase. Clutchside.

A crankshaft dummy - initial layout.

First mockup of the twins barrels. Twin- project is on the move - slowly that is. Bore to bore distance had to be decided before moving on, and now everything fits. Height of cylinder is dictated by: conrod length, and index of camchain.

Engine specs as of september 2011:
CD50 crankcases widened 50mm, bore&stroke of 35x 26,5mm, rodlength 60mm c- c, siamesed CD50 heads with SS50 cams, CR80 six-speed trans and clutch.

Contemplating a more historical correct standing- cylinder layout.

New look of shifter arrangement. Modifying housings to receive 6-speed transmission.

Left cover parted - making room for wider crankshaft. Bearing support sandwiched between housings.

Support plates to seal housings. Welded shut.

Twin crank layout - early version. Remaining obstackles are:
Joining heads
Joining camshafts
Left-side sparkplug
Oilpump drive
Oiling
Ignition
Oilsump

Early mock-up. Hmm... well- it even looks cheap!

	This is a low- budget project! Aiming at getting the right sound for a classic fifty Honda racebike. There are other approaches of reaching that goal, and certainly better ones - following shows my way of reaching above goal - without having to sell my kid or something! Based on the CD50/ SS50 housings and as many Honda parts possible, some specs here: OHC, chain driven twin: Bore : 35mm Stroke: 26,5 Transmission: 6speed



	Twin- project is on the move - slowly that is. Bore to bore distance had to be decided before moving on, and now everything fits. Height of cylinder is dictated by: conrod length, and index of camchain. Engine specs as of september 2011: CD50 crankcases widened 50mm, bore&stroke of 35x 26,5mm, rodlength 60mm c- c, siamesed CD50 heads with SS50 cams, CR80 six-speed trans and clutch. Contemplating a more historical correct standing- cylinder layout.



	Remaining obstackles are: Joining heads Joining camshafts Left-side sparkplug Oilpump drive Oiling Ignition Oilsump