Test report from Queensland Race Way

7 February 2003

 

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00model TZ250

  T1 T2 T3 T4 T5 T6 T7 T8 T9
MJ 390/380 380/370       370/360      
Pw/J 50                
Nozzle S3 S2              
PJ 30                
A/S 1.5                
Fuel Shell100,A747                
IG/Timing 2.1   1.7 1.9 2.3        
Gears EDDCCD                
Gearing 14x37             14x38 14x39
Tyre/Prs F30,R29                

Note

 

 

 

 

 

 

4laps check water temp(50C) and look at bike- every thing fine!

Conditions

27C,54%,1016mb

 

 

 make liner mid then 2laps top,Performance better

2laps

Water temp 58C

 2laps

2laps

bit better top keep this IG timing.

Conditions

28C,48,1018

Max engine rpm 12500

3laps

not so different

 Fr brake pads change to full Sinterred Metal 3laps 5laps

Suspension

from ex- owners' setting in Japan.

   take off Fr spring preload take off Fr compression   Take off Rr compression Take off Rr spring preload Lap time 1'19"308    

02model TZ250

  T1 T2 T3 T4 T5
MJ 390/390        
Pw/J 55     50  
Nozzle S3        
PJ 40        
A/S 1.75     2  
Fuel BP98 UNLEADED,A747 Shell 100 Leaded race fuel BP98 UNLEADED    
IG/Timing 2.4        
Gears EDCCCC        
Gearing 14X36       14x37
Tyre/Prs Fr28(BS tyre) Rr 29psi        

Note

 

 

 

 

 

 

2lap power came up from 8000 rpm to 12500rpm and Clear at top!!

Water temp 56C

3laps for comparing fuel :

same performance

Max engine rpm 12500

After market Silencer(short type)

cannot feel any difference but sounds louder!!

 

Jetting

3laps

3laps

Lap time 1'19"394

Suspension from ex-owners' setting in Japan.

       Take off Rr spring preload  
           

Rider John Newton's comments

First of all, I was surprised to see that the condition of the bikes was well above the norm. Major cred given to the 02 model with the radially mounted brakes. First impressions were that the 02 model's powerband seemed broader than the 00, with pickup much lower in the band. After some fettling, we managed to find a similar tune for both bikes, so that I could hardly separate the two.
Suspension settings seemed much too stiff on both bikes for the faster bumps at turn 1 and 2, so after some softer settings were tried, I was able to carry much more speed through that part of the track. Everything else seemed to work well, holding a line on throttle well. After gearing was sorted, I wish I had another day just to see what lap times I could produce on new tyres, as I'm sure these bikes are on the pace straight away.
So, a good day was had by all, and now the bikes are ready to start the season.

Yamaha TZ250

(Left 00 model,Right 02 model)