jerking

this mornin the bike started fine but after 5mins the bike started 2 lose speed and jerk! wa this mean?

 

means something is wrong.

 

is ure katana the carb or injection model ?

ben.

 

I had the same problem and all it turned out to be was the oil filter was in properly. Put that back in the right way and it stopped doing it.

 

ures is 4 stroke.. his is 2

ben.

 

ah ok. that makes sense

 

by jerking im going to assume you mean spluttering.

therefore it could be water or some kidna of liquid/ dirt on your air filter/ clogged jets etc