71,744
edits
Difference between revisions of "Yamaha TA125"
Jump to navigation
Jump to search
adding category
m (Robot: Automated text replacement (-crankcases +crankcases)) |
(adding category) |
||
| (2 intermediate revisions by 2 users not shown) | |||
| Line 5: | Line 5: | ||
The frame was quite similar to an AS-3 unit, though produced as a racing special, featuring different looking top rails and other modifications such as removal of un-necessary lugs and strengthening the unit to handle the rigours of a racing environment. | The frame was quite similar to an AS-3 unit, though produced as a racing special, featuring different looking top rails and other modifications such as removal of un-necessary lugs and strengthening the unit to handle the rigours of a racing environment. | ||
Motor-wise, Yamaha chose to keep the basic form of the AS-3 cylinders and heads. The only modifications were altering the porting and chrome lining the bores, changing the exhaust securing system to springs from bolts, and also changing the [[compression ratio]]. This combined with new exhausts, [[piston]]s, 28mm carbs, close ratio gearbox and a Hitachi CDI ignition system ( visually identical to the TZ units ) boosted the output to a competitive 24bhp at 12,500rpm. Heavier clutch plates, strengthened [[crankcase]]s around the main bearing journals, and the primary gear being secured to the crankshaft by key/keyway and nut rounded off the modifications to the motor. The TA125 was a 5 speed though there were a few factory 6 speeds around. There were 7 gear kits available, for road use. | Motor-wise, Yamaha chose to keep the basic form of the AS-3 cylinders and heads. The only modifications were altering the porting and chrome lining the bores, changing the exhaust securing system to springs from bolts, and also changing the [[compression ratio]]. This combined with new exhausts, [[piston]]s, 28mm carbs, close ratio gearbox and a Hitachi CDI ignition system ( visually identical to the TZ units ) boosted the output to a competitive 24bhp at 12,500rpm. Heavier clutch plates, strengthened [[crankcase]]s around the [[main bearing]] journals, and the primary gear being secured to the crankshaft by key/keyway and nut rounded off the modifications to the motor. The TA125 was a 5 speed though there were a few factory 6 speeds around. There were 7 gear kits available, for road use. | ||
Production of the TA 125 ceased in Nov.1974, marking the end of Yamaha's air cooled 2 stroke production roadracers and the beginning of a five year wait for another 125 roadracer, the [[Yamaha TZ125|TZ125]]. | Production of the TA 125 ceased in Nov.1974, marking the end of Yamaha's air cooled 2 stroke production roadracers and the beginning of a five year wait for another 125 roadracer, the [[Yamaha TZ125|TZ125]]. | ||
| Line 15: | Line 15: | ||
{{clear}} | {{clear}} | ||
==1974== | ==1974== | ||
[[Image:1974-Yamaha-TA125--2078-0.jpg|left|thumb|1974 Yamaha TA125]][[Image:1974-Yamaha-TA125--2078-1.jpg|left|thumb|1974 Yamaha TA125]][[Image:1974-Yamaha-TA125--2078-2.jpg|left|thumb|1974 Yamaha TA125]][[Image:1974-Yamaha-TA125--2078-3.jpg|left|thumb|1974 Yamaha TA125]][[Image:1974-Yamaha-TA125--2078-4.jpg|left|thumb|1974 Yamaha TA125]] | [[Image:1974-Yamaha-TA125--2078-0.jpg|left|thumb|1974 Yamaha TA125]] | ||
[[Image:1974-Yamaha-TA125--2078-1.jpg|left|thumb|1974 Yamaha TA125]] | |||
[[Image:1974-Yamaha-TA125--2078-2.jpg|left|thumb|1974 Yamaha TA125]] | |||
[[Image:1974-Yamaha-TA125--2078-3.jpg|left|thumb|1974 Yamaha TA125]] | |||
[[Image:1974-Yamaha-TA125--2078-4.jpg|left|thumb|1974 Yamaha TA125]] | |||
<br style="clear: left"/> | <br style="clear: left"/> | ||
==References== | ==References== | ||
| Line 31: | Line 35: | ||
[[Category:125cc 2-stroke motorcycles]] | [[Category:125cc 2-stroke motorcycles]] | ||
[[Category:Racing motorcycles]] | [[Category:Racing motorcycles]] | ||
[[Category:Needs motorcycle template]] | |||