Difference between revisions of "Honda SL70"
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{{DISPLAYTITLE:{{PAGENAME}}: history, specs, pictures}} | |||
{{Motorcycle | |||
|name = Honda SL70 | |||
|photo=1971-SL70.jpg | |||
|aka = SL 70 | |||
|manufacturer = Honda | |||
|parent_company = | |||
|production = 1971 - 1973 | |||
|model_year = | |||
|predecessor = | |||
|successor = [[Honda XL70]] | |||
|class = | |||
|engine = single cylinder, four-stroke | |||
|bore_stroke = | |||
|compression = | |||
|top_speed =32 mph | |||
|power = 6.44 HP (4.8 KW) @ 9500RPM | |||
|torque = | |||
|fuel_system = Carburetor | |||
|ignition = | |||
|spark_plug = {{sparkplug|NGK C7HSA}} 71-72 , '73 | |||
|battery = {{battery|YUASA 6N2A-2C-3}} YUASA '73<br />{{battery|YUASA 6N2A-2C}} 71-72 | |||
|transmission = Gear box: 4-speed <br> | |||
Final Drive: [[chain]] <br> | |||
|final_drive={{chain|420x96}} | |||
|front_sprocket=13T | |||
|rear_sprocket=44T | |||
|frame = | |||
|suspension = | |||
|brakes =Front: Drum <br>Rear: Drum | |||
|front_tire = {{tire|2.50-16}} 71-72 , '73 | |||
|rear_tire = {{tire|2.75-14}} 71-72 , '73 | |||
|rake_trail = | |||
|wheelbase = | |||
|length = | |||
|width = | |||
|height = | |||
|seat_height = | |||
|dry_weight = | |||
|wet_weight = | |||
|fuel_capacity = | |||
|oil_capacity = | |||
|recommended_oil=Honda GN4 10W-40 | |||
|fuel_consumption = | |||
|turning_radius = | |||
|related = [[Honda SL90]] | |||
|competition = [[Yamaha JT-1]] | |||
}} | |||
The '''[[Honda]] SL70''' was a single cylinder, [[four-stroke]] Naked [[motorcycle]] produced by [[Honda]] from 1971 to 1973. Claimed [[horsepower]] was 6.44 HP (4.8 KW) @ 9500 RPM. | |||
==History== | |||
In 1970 Honda wasn’t going to let [[Yamaha]] cash in on the new mini-cycle craze with their | |||
[[Yamaha JT-1|JT1MX]], so [[Honda]] Motors Corp’s design facility in Torrance, California came up with the SL70, a scaled down 70cc version of the on-off road Honda SL motorcycle line . | |||
Coincidentally, the SL70 closely resembled the 1969 [[Honda SL90|SL90]], down to the tank/frame design and slanted cylinder configuration. In standard Honda fashion, the SL70 looked good, and seemed ready to take on the Yamaha mini-enduro in all areas. | |||
Unfortunately a few typical Honda design features of the time, like excessive weight and over-engineering cursed the SL70 with a dry weight of 153 lbs, versus the relatively light weight of its competitor, the Yamaha Mini-Enduro at 121 lbs, wet. | |||
Not to say the SL70 was a pig, as thousands of die hard Honda fans snapped up the mild little 70cc buggers for their kids, and even themselves, under the guise of a “pit bike”. And of course, all the Honda hop up aftermarket folks like Poweroll and Webco produced kits to up the SL from its anemic 6.5 horsepower to fire-breathing configurations with high lift cams, big carbs, stroked cranks, big bore kits, etc. Even a Poweroll 110cc kit was offered, that required the owner to bore the cases, stroke the crankshaft, and run a paper-thin steel cylinder liner. Such was the life of a hopped up Honda 4 stroke motosport owner, who sacrificed anvil like reliability for performance. | |||
Seeing that the SL70 was to compete against its closest rival, the [[Yamaha JT-1|Mini-Enduro]], Honda did see fit to equip the SL70 with better forks and shocks than the Yamaha, and the SL came in a full street legal configuration, unlike the Yamaha which would wait to release a lighted version of the [[Yamaha JT-2|JT2MX]] in 1972. | |||
Compared to the Yamaha Mini-Enduro, the SL70 was a well constructed, solid Honda that suffered from excessive weight and higher maintenance than its two-stroke rival. As one who lived the period, and competed against the Honda, the only bad thing I can say about it was the Honda level of thrash-ability that allowed riders to run the poor little bike on the ragged edge of with no-maintenance, that would ultimately cause the bike to explode, and render it a useless expensive door stop. | |||
The SL70 lived on until 1975, renamed the [[Honda XL70|XL70]], and was actually replaced by the [[Honda XR75|XR75]] in 1973, a totally different machine, with a vertical cylinder configuration, and a lighter weight of 140 lbs. 1973 was a milestone year for Honda, with the release of the [[Honda CR250|CR250]] and [[Honda CR125R|CR125 MX]] machines. After ’73, Honda never looked back. | |||
==Engine== | |||
The engine was a [[air cooled]] single cylinder, four-stroke. Fuel was supplied via a overhead cams (ohc). | |||
==Drive== | |||
The bike has a 4-speed transmission. | |||
==Chassis== | |||
Stopping was achieved via Drum in the front and a Drum in the rear. | |||
==1971 - 1973 Honda SL 70== | |||
Honda's SL 70, manufactured between 1971 and 1973, had a 4 speed transmission and a 4 stroke air cooled single cylinder, single overhead cam engine. | |||
==1971-72 SL70K0== | ==1971-72 SL70K0== | ||
<gallery mode='packed-hover'> | |||
File:honda_Sl70k0.jpg|left|thumb|Honda SL70K0 | |||
File:1971-Honda-SL70-Red-2838-0.jpg|left|thumb|1971 Honda SL70 in Red | |||
File:1971-Honda-SL70-Red-2838-1.jpg|left|thumb|1971 Honda SL70 in Red | |||
File:1971-Honda-SL70-Red-2838-2.jpg|left|thumb|1971 Honda SL70 in Red | |||
File:1971-Honda-SL70-Red-2838-3.jpg|left|thumb|1971 Honda SL70 in Red | |||
File:1971-Honda-SL70-Blue-637-0.jpg|left|thumb|1971 Honda SL70K0 in Aquarius Blue | |||
File:1971-Honda-SL70-Blue-637-1.jpg|left|thumb|1971 Honda SL70K0 in Aquarius Blue | |||
File:1971-Honda-SL70-Blue-637-2.jpg|left|thumb|1971 Honda SL70K0 in Aquarius Blue | |||
File:1971-Honda-SL70-Blue-637-3.jpg|left|thumb|1971 Honda SL70K0 in Aquarius Blue | |||
File:1971-Honda-SL70-Blue-637-4.jpg|left|thumb|1971 Honda SL70K0 in Aquarius Blue | |||
File:1971-Honda-SL70-Blue-637-5.jpg|left|thumb|1971 Honda SL70K0 in Aquarius Blue | |||
File:1970-Honda-SL70K0-Blue-642-0.jpg|left|thumb|1970 Honda SL70K0 in Blue | |||
File:1970-Honda-SL70K0-Blue-642-1.jpg|left|thumb|1970 Honda SL70K0 in Blue | |||
File:1970-Honda-SL70K0-Blue-642-2.jpg|left|thumb|1970 Honda SL70K0 in Blue | |||
File:1970-Honda-SL70K0-Blue-642-3.jpg|left|thumb|1970 Honda SL70K0 in Blue | |||
File:1971-Honda-SL70-Blue-642-0.jpg|left|thumb|1971 Honda SL70 in Blue | |||
File:1971-Honda-SL70-Blue-642-1.jpg|left|thumb|1971 Honda SL70 in Blue | |||
File:1971-Honda-SL70-Blue-642-2.jpg|left|thumb|1971 Honda SL70 in Blue | |||
File:1971-Honda-SL70-Blue-642-3.jpg|left|thumb|1971 Honda SL70 in Blue | |||
File:1971-Honda-SL70-Blue-642-4.jpg|left|thumb|1971 Honda SL70 in Blue | |||
</gallery> | |||
<br style="clear: left"/> | <br style="clear: left"/> | ||
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==1973 SL70K1== | ==1973 SL70K1== | ||
<gallery mode="packed-hover"> | |||
File:Honda Sl70k1.jpg|Honda SL70K1 | |||
File:RED 1973.jpg | |||
File:BLUE 1973.jpg | |||
File:Yellow1973.jpg | |||
</gallery> | |||
<br style="clear: left"/> | <br style="clear: left"/> | ||
Line 31: | Line 144: | ||
==See Also== | ==See Also== | ||
*[[Honda SL100]] | *[[Honda SL100]] | ||
==References== | |||
{{reflist}} | |||
{{motorcycle-stub}} | {{motorcycle-stub}} | ||
{{Honda}} | |||
[[Category:Honda motorcycles|Honda SL70K1]] | [[Category:Honda motorcycles|Honda SL70K1]] | ||
[[Category:Honda SL series]] | [[Category:Honda SL series]] | ||
[[Category:1970s motorcycles]] |
Latest revision as of 22:21, 11 May 2023
Honda SL70 | |
Manufacturer | |
---|---|
Also called | SL 70 |
Production | 1971 - 1973 |
Successor | Honda XL70 |
Engine | single cylinder, four-stroke |
Top Speed | 32 mph |
Horsepower | 6.44 HP (4.8 KW) @ 9500RPM |
Fuel System | Carburetor |
Spark Plug | NGK C7HSA 71-72 , '73 |
Battery | YUASA 6N2A-2C-3 YUASA '73 YUASA 6N2A-2C 71-72 |
Transmission | Gear box: 4-speed Final Drive: chain |
Final Drive | Chain: 420x96 |
Front Sprocket | 13T |
Rear Sprocket | 44T |
Brakes | Front: Drum Rear: Drum |
Front Tire | 2.50-16 71-72 , '73 |
Rear Tire | 2.75-14 71-72 , '73 |
Weight | |
Recommended Oil | Honda GN4 10W-40 |
Related | Honda SL90 |
Competition | Yamaha JT-1 |
Manuals | Service Manual |
The Honda SL70 was a single cylinder, four-stroke Naked motorcycle produced by Honda from 1971 to 1973. Claimed horsepower was 6.44 HP (4.8 KW) @ 9500 RPM.
History[edit | edit source]
In 1970 Honda wasn’t going to let Yamaha cash in on the new mini-cycle craze with their JT1MX, so Honda Motors Corp’s design facility in Torrance, California came up with the SL70, a scaled down 70cc version of the on-off road Honda SL motorcycle line .
Coincidentally, the SL70 closely resembled the 1969 SL90, down to the tank/frame design and slanted cylinder configuration. In standard Honda fashion, the SL70 looked good, and seemed ready to take on the Yamaha mini-enduro in all areas.
Unfortunately a few typical Honda design features of the time, like excessive weight and over-engineering cursed the SL70 with a dry weight of 153 lbs, versus the relatively light weight of its competitor, the Yamaha Mini-Enduro at 121 lbs, wet.
Not to say the SL70 was a pig, as thousands of die hard Honda fans snapped up the mild little 70cc buggers for their kids, and even themselves, under the guise of a “pit bike”. And of course, all the Honda hop up aftermarket folks like Poweroll and Webco produced kits to up the SL from its anemic 6.5 horsepower to fire-breathing configurations with high lift cams, big carbs, stroked cranks, big bore kits, etc. Even a Poweroll 110cc kit was offered, that required the owner to bore the cases, stroke the crankshaft, and run a paper-thin steel cylinder liner. Such was the life of a hopped up Honda 4 stroke motosport owner, who sacrificed anvil like reliability for performance.
Seeing that the SL70 was to compete against its closest rival, the Mini-Enduro, Honda did see fit to equip the SL70 with better forks and shocks than the Yamaha, and the SL came in a full street legal configuration, unlike the Yamaha which would wait to release a lighted version of the JT2MX in 1972.
Compared to the Yamaha Mini-Enduro, the SL70 was a well constructed, solid Honda that suffered from excessive weight and higher maintenance than its two-stroke rival. As one who lived the period, and competed against the Honda, the only bad thing I can say about it was the Honda level of thrash-ability that allowed riders to run the poor little bike on the ragged edge of with no-maintenance, that would ultimately cause the bike to explode, and render it a useless expensive door stop.
The SL70 lived on until 1975, renamed the XL70, and was actually replaced by the XR75 in 1973, a totally different machine, with a vertical cylinder configuration, and a lighter weight of 140 lbs. 1973 was a milestone year for Honda, with the release of the CR250 and CR125 MX machines. After ’73, Honda never looked back.
Engine[edit | edit source]
The engine was a air cooled single cylinder, four-stroke. Fuel was supplied via a overhead cams (ohc).
Drive[edit | edit source]
The bike has a 4-speed transmission.
Chassis[edit | edit source]
Stopping was achieved via Drum in the front and a Drum in the rear.
1971 - 1973 Honda SL 70[edit | edit source]
Honda's SL 70, manufactured between 1971 and 1973, had a 4 speed transmission and a 4 stroke air cooled single cylinder, single overhead cam engine.
1971-72 SL70K0[edit | edit source]
- Available three colors: Summer Yellow, Aquarius Blue, and Light Ruby red
- The Honda emblem was blue with a blue and red logo reading "SL70"
- On the yellow bike, the tank stripe was black; but on the other colors the stripe was white
- Engine: 72cc OHC single cylinder
- Transmission: 4-speed with manual clutch
- Speedometer was optional
- Serial number began SL70-1000001
- Spark Plug: NGK C7HSA
1973 SL70K1[edit | edit source]
- Available colors: Candy Riviera Blue, Fire Red, and Candy Yellow
- The fuel tank and "70" decals were yellow
- Engine: 72cc OHC single cylinder
- Transmission: 4-speed with manual clutch
- A speedometer was now standard
- The serial number began SL70-1100001
1974[edit | edit source]
- In 1974 it was called the XL70 although it was basically the same bike.
See Also[edit | edit source]
References[edit | edit source]
Motorcycles: CB series | CBF series | CM/CMX series | CX Series | CBR series | NSR series | CR series | Pacific Coast | XR/XL series | Bros/HawkGT | VF/VFR series | VT series | VTX series | ST series | Valkyrie series | GL series| NR series |
Mopeds and light motorcycles: Ape models | Cub series | CT series | ST series/Dax | S series |Wave series | Z series |