richard 72

I own a 87 fz750 with 30k on it the bike is clean and runs like crazy when pushing hard but driving normal it has a bad scary dead spot in the throtle and its had a good mech tune and trouble shoot with no luck the yamaha dealer told me that bike was knowen for this prob. I have a hard time believing this does any one have any ideas. only thing that i have noticed is when its cold out theres almost no problem at all (Jetting ?)

I own a 1987 fz 750 with 28000 km on it the bike is all orginal but has a flat spot in the throtle that makes it really hard to ride. I have spent many hours as well as the local yamaha shop trying to fix this they are telling me that the timing is so high that it happens with all these bikes. sorry i dont buy this does any one have any info I did some reseach on this and some shops say its the choke ciruit that is to blame