Press Release: Honda MB-8

The daddy of the MBX, here is the original Japanese press release for the 1980 Honda MB-8. The text has gone through google translate so reads a little funny...

February 15, 1980 Honda motorbikes type sports MB-8 (eight) to launch two models simultaneously released with some improvements

Honda Motor (Japan) is a new design of high-performance two-cycle engine, bodywork and fresh unique design technology to load 80 cc sports car, "Honda MB-8" from February 22 release. The 8 MB-Honda, nimble handling and transit point to the primary axis BARANSA, central cooling cylinder head combustion chamber, the combustion chamber bell technologies such as high-power engine (9.5 horsepower), a simple

Items / models	MB-8 MB-8
Standard cash price  In the district of Sapporo price	152,000円 152,000 yen (155,000円) (155,000 yen)
Sales Plan (Years, domestic only)	3,000台 3,000 units

Items / models		MB-8(HC01) 8-MB (type HC01)
(m) Wingspan × × Length (m) Height		1.880×0.655×0.980 1.880 × 0.655 × 0.980
(m) Wheelbase (m)		1.220 1.220
(kg) Vehicle Weight (kg)		91.82 Maintenance: 91, dried: 82
(L) Fuel tank capacity (L)		9.0 9.0
(km/L) Fuel consumption (km / L)		60(50km/h 60 (50km / h proving ground test values)
Engine type		Air-cooled two-stroke single-cylinder
(cm 3 ) Exhaust volume (cm 3)		78 78
(mm) Lumen diameter (mm) × stroke		45.0×49.5 45.0 × 49.5
PS/rpm) Maximum output (PS / rpm)		9.5/8,000 9.5 / 8,000
(kg-m/rpm) Maximum torque (kg-m/rpm)		0.89/7,500 0.89 / 7,500
Gearbox		5-speed return
Frame format		Backbone -
Tire size	(前) (Previous)	2.50-18-4PR 2.50-18-4PR
	(後) (Post)	2.50-18-6PR 2.50-18-6PR
Brake format	(前) (Previous)	Hydraulic disc
	(後) (Post)	Mechanical leading trading ring

Press Release: 1983 Honda MBX80 Integra

I found this gem on a google trawl, the original PR piece for the MBX and MTX80. You can also find the PR for the MBX50, 125 and their big brother the MVX250.
Google translated from Japanese. http://www.honda.co.jp/news/1983/2830621.html
June 21, 1983 
New release of two models of 80cc sport bike "Honda Integra · MBX80" "Honda · MTX80R" equipped with water-cooled 2-cycle engine 

---

Two models of Land sport bike "Honda · MTX80R" lightweight design of Honda Motor Co., Ltd. is equipped with a single-cylinder two-cycle engines · 79cc water-cooled, and road sports bike "Honda Integra · MBX80" full-featured fairing At the same time from the date of release June 22. 
Engine mounted on a "MBX80 Integral" has adopted a hemispherical combustion chamber of an excellent combustion efficiency. Such as the adoption by the lead four leaf valve rectification Itazuke intake leads to further smooth, large exhaust chamber, which will exert a high output of 12PS / 9,000 rpm. 
In addition, hydraulic disc brake mounted dual-piston calipers exert pro-link rear suspension and provide a follow-up of proven excellent road surface, a high braking force, when traveling, such as to protect the rider from wind pressure full fairing, further loading sports have adopted the appropriate equipment to enhance the bike. 
Engine "MTX80R" has adopted a four leaf valve lead Itazuke hemispherical combustion chamber and rectification similar to <MBX80integura>. Has secured a tenacious performance of torque at low speed to medium according to the usability of the land of high output and sports 11PS / 8,500 rpm. 
In addition, captured the road surface to ensure even in rough terrain, was secured and the Pro-Link rear suspension provide a follow-up road surface was excellent, the long stroke of 200mm, the front suspension of the built-in mechanism fork, slim body with excellent arrived at the foot further due, has become something to enjoy comfortable driving to the city from uneven terrain.

Sales plan, the plan (annual domestic) MBX80 integral units 3,000 units 3,000 MTX80R  
National standard cash price is 228,000 yen 198,000 MTX80R Integra MBX80 yen. 
(Hokkaido, Okinawa and other price. High and 3,000 yen, except for some islands)