Novak GTB Cap!

[grindog]

Hi, i ran my touring car tonight on a 10.5 novak and it seems slow. In the manual it suggests that a cap can be the source of the problem but at a tenner i would like to make sure. The gearing, cars transmission etc are all fine but it didn't feel like it has tonight

Do the caps pack in alot and should be treated as a consumable part? or am i just way off track

thanks, john