I've change the motor in the Lotus 49, the Penelope Pitlane chassis was fitted with a SPR 30k motor and 9/27 gears but I have now replaced the motor with a SRP 35k but to give a bit more brake I have changed the gears to 9/28. On testing at the club track this evening the car appeared to be running ok but then kept stopping, it would then run for a few inches and stop again. It was suggested that the crown gear may be to large for the the PP chassis so some more work will be required.