The two G&S Racing Kawasaki riders both completed their first-round race in the National Superstock 1000 Championship despite having very little track time during free practice and qualifying because of the poor weather conditions.
Tom Fisher qualified in 16th position and began the race from the sixth row.
He had a problem on the warm-up lap with a clutch issue which hampered him at the start and he dropped down to 19th at the end of lap one.
He lost ground down to 22nd before mounting a comeback and held 18th place until the final lap when he was beaten back a place to cross the finish line in 19th.
Meanwhile Kevin Van Leuven was contesting his first stock 1000 race after moving up from the 600 class.
He made a steady start and maintained 25th place for the majority of the 11 laps before he too was beaten back a place to take the chequered flag in 26th place.
Team manager Mark Fisher said: “It’s been a difficult weekend for everyone here at Silverstone because of the weather.
“We lost a lot of track time because it was so cold and wet on Friday and it was no better for final qualifying on Saturday.
“Tom had a few problems at the start with a clutch issue which caused him to have a bad start.
“He was then circulating amongst riders further down the field which enabled the leaders to get away.
I am pleased with Kevin considering it was his first ride on the big bike, he did well in his first race.Team manager Mark Fisher
“His lap times were good but he was just a bit too far back to make much headway.
“I am pleased with Kevin considering it was his first ride on the big bike, he did well in his first race.
“He will gain ground as he experiences more track time which we were desperately short of this week.
“We are still awaiting some parts for the new Kawasaki ZX10 and once we have them we will see our lap time tumble.
“Thanks to all our sponsors for their support and to everyone who came along to watch us this weekend.”
The next race is at Oulton Park over the weekend of April 30, May 1 and 2.