RE: top speed

Derbi GP1 50 discussion forum:


RE: top speed

RE: top speed 
Andy said 2005-12-29 16:48 
 
Ok these are the simple steps to follow - they are recomended to be done by a Qualified Mechanic as there easy to mess up and then you come back asking Whats wrong with my ped

1) De restrict your ped (remove restrictors ie/ exhaust cone, variator washer and cdi unit) Stage Zero
2) Fit a "sports exhaust" (ie/ Leovinchi Zx) Stage One Tuning
3) Fit rollers, belt and clutch suitable for that
4) Buy a bigger bore ( ie/ mhr 70cc ) Stage Two Tuning
5) Buy a bigger Carb ( ie Deloroto 17.5mm, 19mm or 21mm ) Stage Three Tuning
6) Adjust Carb mixtures and air jetting (add an open air filter if wanted)
7) Add a gear up kit Stage Four Tuning

Once you have followed those steps thats what i call "road tuning" and will get you around the following speeds:
Stage One: 55mph
Stage Two: 60-65mphmph
Stage Three: 65-70mph
Stage Four: 70-75mph

Note: Theses are ESTIMATED SPEEDS for a 50cc (with 70cc kit fitted as stage 2) not a 125/172 
 
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