Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Pos | No | Rider | Manufacturer | Laps | Time | Grid | Points |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 46 | Valentino Rossi | Yamaha | 21 | 43:06.007 | 2 | 25 |
| 2 | 2 | Dani Pedrosa | Honda | 21 | +4.008 | 1 | 20 |
| 3 | 4 | Andrea Dovizioso | Honda | 21 | +8.536 | 6 | 16 |
| 4 | 69 | Nicky Hayden | Honda | 21 | +8.858 | 4 | 13 |
| 5 | 56 | Shinya Nakano | Honda | 21 | +10.583 | 15 | 11 |
| 6 | 1 | Casey Stoner | Ducati | 21 | +13.640 | 7 | 10 |
| 7 | 65 | Loris Capirossi | Suzuki | 21 | +15.936 | 8 | 9 |
| 8 | 5 | Colin Edwards | Yamaha | 21 | +18.802 | 5 | 8 |
| 9 | 7 | Chris Vermeulen | Suzuki | 21 | +23.174 | 11 | 7 |
| 10 | 14 | Randy de Puniet | Honda | 21 | +25.516 | 9 | 6 |
| 11 | 21 | John Hopkins | Kawasaki | 21 | +27.609 | 10 | 5 |
| 12 | 13 | Anthony West | Kawasaki | 21 | +41.399 | 13 | 4 |
| 13 | 50 | Sylvain Guintoli | Ducati | 21 | +45.617 | 16 | 3 |
| 14 | 15 | Alex de Angelis | Honda | 21 | +49.003 | 17 | 2 |
| 15 | 24 | Toni Elias | Ducati | 21 | +59.139 | 19 | 1 |
| 16 | 33 | Marco Melandri | Ducati | 21 | +1:03.328 | 14 |  |
| 17 | 9 | Nobuatsu Aoki | Suzuki | 21 | +1:48.363 | 18 |  |
| Ret | 48 | Jorge Lorenzo | Yamaha | 12 | Accident | 3 |  |
| Ret | 52 | James Toseland | Yamaha | 2 | Accident | 12 |  |
Question:
how many riders used a motorcycle manufactured by honda?
Answer:
6