From 1970 to 75

At the end of 1972, Honda launched the TL125, known in Japan as the name of BIALS.

Engine used for it was the 121,9cc (54 X 49,5mm) two valve sohc from the Honda SL125 model, lowering its compression from 9:5 to 8:1
Little Honda Tl 125 was very popular, Honda had big success in the US, Japan and Europe.

The Honda TL 125 had a lot of series, for sure the most successful Honda trials.

From 1972 to 1988 little Honda TL125 had basically two series: The Japan Bials series and the US TL series:

Honda TL125 US Model Series

1973 Honda TL125 K0 (US model)

1974 Honda TL125 K1 (US model)

1975 Honda TL125 K2 (US model)

1976 Honda TL125 S (EU model)

1981 Honda TL125 Ihatovo (EU and Japan) from there equipped with CDI

1983 Honda TL125 DJ (EU model)

1988 Honda TL125 JD06 (EU model)

Honda BIALS 125 Japan Model Series

1972 Honda BIALS 125 K0 (Japan model)

1974 Honda BIALS 125 K1 (Japan model)

1975 Honda BIALS 125 S (Japan model)

1981 Honda IHATOVO 125 SB (Japan model)

The bike had following equipement (several modifications and improvements were added during all his live):

The ENGINE

The engine was a Honda Single Cylinder, air cooled

Four stroke with two valves on head.

Displacement: 122cc displacement.
Bore and Stroke: 56,0 X 49,5 mm
Compression Ratio: 8.0 : 1

The maximum power was 8 hp at 8.000 rpm
Clutch: Wet, multi-plate
Ignition System: Flywheel magneto

The FRAME

Steel tubular frame 88 Kg weight

2.75-21 and 4.00-18 tires

The TRANSMISSION

Five speed, constant mesh

For more detailed TL125 information see please the link below (fantastic web page enterely dedicated to this TL125 model from Jose, France):

http://tl.125.free.fr/index2.htm

Honda Trials History TL 125 colaborators Pictures

100% Original 1975 Honda TL125 from The National Motorcycle Museum in Anamosa, Iowa. Picture sent thanks to Jay Gaard from Cedar Falls, Iowa

1975 Honda TL 125 K2 Picture thanks to Jeremy

Thanks to this Honda Trials History collaborator we can enjoy with these nice pictures of his 1974 TL125 purchased new and recently transformed to a SAMMY MILLER bike. Thanks for your pictures.

Picture sent by Jiří Kříž Czech Rep.

Who say's you can't go big on a vintage bike?
1974 Honda TL125 thanks to John Ulver from USA.

1974 Harry Fairbairn's Honda 125 trials

In 1974 after some Japanese riders did participate aboard little 150cc Honda machines (based on the 125s) in the Scotish Six Days Trial, Harry Fairbairn, Scotish Honda dealer, made a special bike based on the XL 125 Trail. The bike was modificated to reduce the weight, achiving a reasonables 180lbs, also special mudguards, exhaust system, and foldable footrests were made. These bikes were sold by Fairbairn at 300L.

I have no notice of any of these bikes surviving today. Also no fotos.

1974 The Sammy Miller's Honda

After sign a contract with Honda Japan, Sammy Miller made his own Team to develop the specific Honda for trial. Early 1974 he agreed to develop all the Honda range of trial bikes.

This Team developed in 1974 the new Honda trial 250cc based on the XL250 engine.