The Huta Ludwików (Ludwików Ironworks), founded in 1919 in Kielce, produced first hardware and agricultural machines. Since 1938 it started production of a motorcycle of own design, using British Villiers 98 cm³ engines (parts of engines were locally manufactured). The motorcycle was named SHL 98 - SHL being a short of Suchedniowska Huta Ludwików (Ludwików Ironworks of Suchedniów, for the works were initially owned by a foundry in Suchedniów). Less than 1,000 motorcycles were manufactured until the outbreak of World War II in 1939 and the German occupation.
Postwar - the beginnings
After the war the looted works were nationalized and it was decided to continue with motorcycle production. The first postwar model SHL 125 – M02 of 1947 was a mix of pre-war parts and frames and the German DKW RT 125 design, using a copy of the RT125 engine, produced by PZL Psie Pole in Wrocław. A small series of 203 motorcycles was manufactured in State Automobile Workshops Nr.2 in Warsaw (later WFM works) and was similar to Sokół 125 of the same works.
The first model to be produced in Kielce again was improved SHL M03 of 1948, and then SHL M04 of 1949. In 1948 the name Huta Ludwików was changed to KZWM Polmo-SHL (Kieleckie Zakłady Wyrobów Metalowych - Kielce Metal Works). Luckily, the communist authorities decided to keep pre-war SHL brand, which was not a rule. In 1951 it was however decided to stop motorcycle production in Kielce and until 1954, the production of SHL M04 was continued in the WFM in Warsaw, followed by a short series of SHL M05 in 1955, with telescopic front suspension. All these motorcycles were improvements of one design, related to the DKW RT 125, with 125 ccm engines. Some 18,500 motorcycles had been made in Kielce so far. Then, the SHL brand disappeared for a short time, replaced by the WFM brand.
After the end of Stalinist period, from 1958, the KZWM in Kielce returned to motorcycle production. The new model was SHL M06U, which was an improved version of the WFM M06, more luxurious and fitted with 150 ccm engine. By 1959, 10,356 were made, followed by 27,370 of improved model M06T, with improved front suspension.
Most popular model became the SHL M11 - some 180,000 made in 1961-1968. It was a new model, although being a development of the M06T, powered by 175 ccm engine. In spite of its rather limited capacity, it was the second Polish motorcycle at that time, as regards to the capacity and power, after the Junak. Some M11s were exported, even to the USA, and in 1962 the Escorts group bought a licence to manufacture this model in India, under a brand Rajdoot. According to some information, it became a staple of Indian rural milkmen and its licence production lasted until 2005. But now Indian bike riders have huge demand for the model M11 which is known as Rajdoot 175 Electronic in India, if one is selling their Rajdoot; people who are fond of M11 they pay their demanding rates to buy it, on Indian roads it is barely seen but whenever people see it, it catches their eye and make them to ask about the motorcycle. There is a saying in India: 'Sona Gaadi Hai Sona Khona Nahin' which means This Vehicle is Gold Never Loose it. In India it's parts are still available not easily but it can be found. People those who have oldest original parts with them, they sell it by quoting their own rates, because it is a vintage that everyone dreams to own the motorcycle. 
The M11 was followed by an SHL M17 Gazela (gazelle), with stronger 175 ccm engine and attractive-looking fairings. Some 50,000 were made in 1968-1970. Unfortunately, it was the last model with the SHL badge, since the authorities decided, this time ultimately, to stop motorcycle production in Kielce and leave the WSK PZL-Świdnik as the only Polish motorcycle manufacturer.
- Henshaw, Peter (2008). The BSA Bantam Bible: All Models 1948 to 1971 (2008 ed.). Veloce Publishing Ltd. ISBN 978-1-84584-159-1. - Total pages: 160
- Zakrzewski, Adam (2010). Auto-moto PRL: władcy dróg i poboczy ("Auto-moto Polish Peoples Republic: kings of streets and roadsides") (in Polish) (2010 ed.). Demart, Warsaw. ISBN 978-83-7427-484-5.