On 2008 - 2011 Models the throttle will only open part way. Modifying the throttle cam to allow it to turn fully will solve this. Can be done with hack saw or dremel tool. Careful where the shavings go! Test by turning throttle and observing if slide fully retracts.

The larger foot on the cam is on the later models.

This is how you fix it!

If you have questions about your 2008 - 2011 Zuma, we have answers!

Please note the location of the air screw. On the 2008 - 2011 models there is an aluminum colored plug in the hole covering the adjustment screw.

These Mods change your 2008 - 2011 Zuma from a Scooter that can barely get out of it's own way into a good performing fun Zuma!

The picture on the right has the area to be removed outlined in red.

If you have questions about your 2008 - 2011 Zuma, we have answers!

2008 - 2011 Zuma Fixes: While we do not advocate tampering with the intake or exhaust of an EPA regulated vehicle we know that you would only do it if you were going racing on a closed course! We offer the above advice and or parts so you can go racing and keep up with the older model Zumas!
All products are Legal Only for Racing Vehicles
and are not intended for use on pollution controlled street vehicles

The picture below shows a fully modified throttle cam




m-f 9-5 pacific 

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Page 1 Exhaust Systems  
Page 2 Fine Tuning-Belts, Springs  
Page 3 Cylinder Kits  
Page 4 Variators  
Page 5 Final Drive  
Page 6 Carburators  
Page 7 Brakes  
Page 8 Tires  
Page 9 Front Suspension  
Page 10 Rear Suspension  
Page 11 Dual Head Light Mod  
Page 12 Corbin Seats  
Page 13 Rear Luggage  
Page 14 2008 Zuma Fix it Kit  
Page 15  
Page 16 Tech Tips
Page 17 Engine Work  


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