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View Full Version : DRR 90 Top end rebuild specs advice needed



ewweinreich
06-13-2013, 09:52 AM
I am preparing to do my first top end freshen up this winter and need some advice on clearances. I have read a ton on how to do it (not too hard). I have 2013 DRR 90 with the factory cast iron head. I purchased a Wiseco piston and OEM top end kit from G-force Powersports.

I run %50 Sunoco 110 and %50 percent 92 pump premium in it. No other mods have been done outside of a Twin Air filter and CVT Tuning

We are not racing only riding at the sand dunes. I would like to know what are the recommended piston to wall clearances/ ring end gaps clearances, and range of Squish I should shoot for. Any other advise would be greatly appreciated.