MRC Forum- brought to you by www.morini-riders-club.com Member: g7AW3f

am still trying to decide whether my bike is a sport or strada and wonder how this affects carburation. the bike appears to be a standard strada and the engine and frame number 16306 suggets this according to MRC data.
However the bike does have the S stamped below the front pot which would suggest a sport.
As part of a general going over I have stripped the carbs ( these are VHBZ 25 B followede by an s in a circle) and find that although the atomiser is a 260K suggesting a strada the main jet is a 115 suggesting sport I am asking if one of these is therefore incorrect how much it would affect the bikes performance and if I need to change one which should it be?

also simple question -what fork oil should I be using as the man in the local bike shop got very confused when I gave him the specification from the NLM manual

I have a 82 sport, it is fitted with Sito silencers.I know that the jets /atomisers were not as per the quoted spec and maybe need playing with.I cannot recall what they were right now and omitted to make notes at the time I rebuilt the carbs.When will I learn? So the bike seems to run OK but I have nothing to compare it with. I have made sure the ignition side is as good as it can be,for a standard set up.It has not been around a track and only used on road runs so not tested to the limit.Honest. I have not yet checked the air filter condition.When will I learn? (again).
I recently did the fork oil using 200mL ( I think)of Fuchs 10 grade.Damned if I can detect any difference so thats either as good or as bad as it should be. However it may be your forks respond differently at this grade, you might need to experiment with 10-15 or half and half.

HLP80 is hydraulic oil (Think JCB).

80 weight hydraulic (or gear) oil is equivilent to 30 weight fork (or engine) oil.


Marzocchi supplied Morini with so many different fork internals that anywhere from 5-30 weight might be right for your bike.

In all the sets of forks I have, I've seen two different types of internals. The size and number of drilled holes are different. There may be more variations though. I use 30 grade fork oil as I find that only this gives an acceptable amount of rebound damping. It's not easy to obtain now as most modern forks use lighter grades. Silkolene and Bel Ray both do 30 grade.