Basically, We have discoverd that the Jolly moto does not fit the 03 bikes onwards.
The ports on the 03 bikes are thinner than those on the later models.
I'm fortune as I have a mate who has 'spare' parts from older models and I can get a 'biger' manifold for my bike to allow the jolly moto to fit properly.
Have alook at the pictures of the jolly moto hole and the 03 rs 125 port manifold bit.
Thanks - Flames.
p.s - I sprayed the exhaust chamber black (thats why its black) and all the brown shit is the crap from where we used a exhaust gaskest baffle sealer that failed to work.