The Acerbis Amateur Nationals series comes to a dramatic conclusion this weekend at Culham MX Park in Oxfordshire where all eight titles up for grabs this year will be decided.

The notoriously tough track on an imposing banking by the side of the River Thames will provide a fitting venue for the climax of the UKā€™s biggest amateur series.

Currently sitting pretty with a healthy 159-point lead, defending Moto Connection 125cc champion Dylan Spencer is in pole position to retain his title with Stu Owen the only rider who has still got a mathematical chance of deposing him.

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With five races and a maximum of 200 points up for grabs, just the smallest mistake or mechanical problem could prove costly and Adam Harrisā€™ 42-point lead over Brad Wheeler in the California MX Dreams 250 Two-stroke class is definitely at risk.

Itā€™s almost as close in the Manchester Xtreme Junior Open category where Ben Stanley holds a 43-point lead from Aiden Carney.

Stanley has led the championship since the opening round at FatCat but a disappointing result last time out at Farleigh Castle has put the title on the line with everyone in the top six still in with a shout.

Jane Daniels leads the Matthew Rudd Photography-backed Ladies class by just 36 points from Nadiya Jones but the enduro star has won every round this year apart from Hawkstone Park where she missed the Sunday action to travel to Fort William for the SSDT.

Former Maxxis contender Lewis Trickett is unbeaten at the last three rounds and leads the Paradise MX Holidays MX1 title chase by 51 points from Ed Briscoe while Seb Berthiaume is 78 points clear of Ashley Beniston in the Craigs Motorcycles MX2 class.

In the LS2 helmets-sponsored Vets Over 40s itā€™s Brian Wheeler whoā€™s setting the pace with a 128-point advantage over Danny Tollet and Chris Brown has a healthy 131-point cushion in the Roberts Plant Over 50s over Morton Hannah.

The action kicks off at 9am both days. Culham is off the A415 between Abingdon and Clifton Hampden. The entrance to the site is through Culham No.1 Industrial Park.

Nearest postcode to the entrance is OX14 3DA.