richard 72 Posted February 26, 2010 Share Posted February 26, 2010 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 ?) Link to comment Share on other sites More sharing options...
750 FZX Posted February 26, 2010 Share Posted February 26, 2010 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 also cruise the FZX 750 and am experiencing the same especially at take off with less accerelation. But at a good speed the machine realy performs. May be i would like to know the fuel consuption if any one has an idea. thanks Link to comment Share on other sites More sharing options...
G Beale Posted February 27, 2010 Share Posted February 27, 2010 FZ750 is know for having very good fuelling as standard so maybe your bike has been jetted for a performance air filter &/or exhaust then had the original items refitted or you have performance items fitted with standard fuelling ? aftermarket exhausts are known to mess with the power curve on the FZ giving flat spots as you have described. Would seem that your air/fuel mixture is at fault if the problem is less evident in cold weather ? Dyno jet kit might help to smooth out your power delivery ? Link to comment Share on other sites More sharing options...
750 FZX Posted March 4, 2010 Share Posted March 4, 2010 FZ750 is know for having very good fuelling as standard so maybe your bike has been jetted for a performance air filter &/or exhaust then had the original items refitted or you have performance items fitted with standard fuelling ? aftermarket exhausts are known to mess with the power curve on the FZ giving flat spots as you have described. Would seem that your air/fuel mixture is at fault if the problem is less evident in cold weather ? Dyno jet kit might help to smooth out your power delivery ? Link to comment Share on other sites More sharing options...
750 FZX Posted March 4, 2010 Share Posted March 4, 2010 Thanks for the reply, One of my exhoust pipe is getting heated up its actually changing color what could be the cause???? Link to comment Share on other sites More sharing options...
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