www.rkengines.com

The best way to know if your engine is in optimum condition between rebuilds is to leak test it every few races. This will alert you to problems early, and in the case of a tight valve you may be able to adjust clearance before damage to valve and or seat occur.

A problem we see from certain popular race fuels; is deosits left behind in the combustion chamber that are not only corrosive, but are causing poor sealing of valves. Testing will also show if any of this nasty "sand like" meterial is between surfaces, hurting that critical component of a competetive engine.

 For help in eliminating this issue; we recommend purging your engine with pump gas after your race and spraying a storage oil product or 2 stroke oil mix into the intakes while running. This is very important if the engine is going to sit a while.

So get yourself a differential gauge like the ones available from Snap-on, Mac or Motion-pro. Follow the manufacurer instructions and take care not to use too much pressure as this can hurt rod bearings.