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Discussion Starter #1
Hi,

Quick question,

Ive been out on my friends 650 sx today, totally standard.

His feels a lot quicker than mine on the initial acceleration and top speed.

He has a standard impeller same as mine, what else can cause his to be quicker.

Engines are the same, but when i throttle mine the engine revs but the drive just is not as good.

Please can someone advise me on anything im missing out here?

Thanks
 

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Your pump may just be more worn that his. Check the clearance between the outer edge or the impeller and the pump housing. You may need a new wear ring if you have too much clearance
 
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