After qualifying in third place, Fischer started the first race on Saturday for the first line start which took place on the short Indy circuit.
As the lights went out, Fischer dropped to third in his class but fifth overall in the mixed grid of riders.
He caught and passed Wilfred Turner on lap four and finished fourth overall and spent the next 10 laps chasing Sam Throw, who he passed on lap 14 of 20.
He then had a clear track which enabled him to capture the two leaders, Finlay Arscott and Tommy Fielding.
The trio then entered a close and exciting battle for the lead, covering three riders.
But try Fischer just couldn’t make the pass he needed and crossed the finish line for third place.
On Sunday, race action moved on to the full international circuit with Fischer starting in the middle of the front row and taking second on the first lap.
He passed Arscott on lap two to take the lead, and when the red flag stopped the race, he began to draw a small gap.
On the restart which was to be a seven-lap dash for the flag, Fischer was running for fourth when it started to rain.
Slowing down to avoid slipping in wet conditions, he dropped a few spots and the red flag came out once again.
This time a result was declared and Fischer was ranked sixth.
After setting the fastest lap of the short second race, Fischer started the final race from pole position.
But James Alderson beat him in the first corner and took the lead in his tire track with Fischer.
The two leaders made a break at the front and remained within 0.3s of each other until lap 10 of 12 when they faced some back markers.
Alderson was lucky and passed the back markers without a hitch, but Fischer was caught and lost ground and had to be content with second place with only 1.19 seconds.
Fischer did enough to maintain his second place in the overall rider standings, with Arscott leading 331.5 points while Fischer has 294.
But with two rounds and four races to go, it is still possible for them to make up for the shortfall.
Fischer said: “There was some very close racing at Brands Hatch but that’s normal in this class. The top three or four riders are all at the same pace and it’s just down to who makes the best starts and things like that.”
“In that last race I was unlucky because there was nothing in it until we grabbed the back markers.
“I paused for a fraction of a second but it was enough for James to go away. But he’s running and we both really enjoyed the fight.
The next round is Cadwell Park on 3/4 September.
Kim Racing is based at Fishtoft near Boston, the headquarters of the transportation company George H. Kim & Company, which has branches throughout the county.