Running engine with no air filter

[mydlyfkryzis]

the initial question was could he run the engine without a filter to test it......sure you can as long as there are no loose parts that will end up in the engine or the area is dirty but again there are a lot of people who run bikes without filters on the road with out issues..and again not best but far from disastrous. i have seen 40 to 50 year old bikes that have never had filters on them and still are on stock bores....

Lot's of "old" bikes around. Did the bikes have 2000 miles or 20,000 miles or 100,000 miles...There are quite a few bikes that go 100k miles without problems, bet they all have filters. But we aren't really talking about long term just testing.

So in the spirit of the question, you can run without side covers, without alternator covers, without tappet covers. For testing....Leave the points exposed...
No header pipes, etc... All possible....
Just requires an understanding of what you're exposing and what the risk is....I am not so sure everyone truly understands the risk.

Unless the OP is actually checking the operation of the carburetor, there really isn't a good reason for the risk, especially if you aren't fully cognizant of the risks.