Chennai, Sep 30 (IANS): The MRF FMSCI National Motorcycle Racing Championship is set for a tight finish as the fifth and concluding round gets underway here Saturday with titles in four of the five classes still up for grabs.

The only class where the championship is effectively sealed is the Group D Open (165cc) with Shyam Shankar of Moto-Rev India enjoys an unbeatable lead with a tally of 74 points to his team-mate D Dinesh Kumar's 43.

Of particular interest would be the tussle in the Group B Open (165cc) with Deepak Ravikumar (58) just one point ahead of K Jagan of TVS Racing and who in turn has a 10-point lead over team-mate Harry Sylvester.

Deepak is also in line for the championship in the premium Superbikes (Group A, 600cc) class as he trails Krishnan Rajini (70) by six points. However, Rajini has seven consecutive wins as against just one by Deepak.

Likewise, S Madhan (63) and Abhishek N of Moto-Rev (54) go head-to-head in the Group D Novice (165cc) class while just eight points separate the top three in the Group D Novice (130cc) category with Rajesh Ratna Kumar (56), Anand P (52) and S Prativ (48) in contention.

In the Honda MMSC One Make Championship, M Sudhakar leads the Stunner category with 68 points while Arvind Ganesh heads in the CBR150 with 30 and Shyam Shankar tops the CBR 250 with 36.

In the Yamaha MMSC One Make Championship, S Madhan and Shyam Shankankar are leading in the R15 Novice Open classes, respectively, with 70 points apiece.