05-04-2009, 05:03 PM #1
- Join Date
- Jul 2006
- 1600Lisbon, Portugal - Europe
Starting from Zero testing XP/XPL Pump
Have upgrated my XP/XPL 2001 from 951cc stock, to second hand 1050cc rotax racing kit last bore and new 92.04mm piston's.
I'm confused wich impellor to go to the best top speed.
05-04-2009, 10:04 PM #2
In a stock pump I think a 15-20 concord works real good. I run a 15-21 concord in my setback pump.
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