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Jetting an XR100 (Pilot jet)

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I'm new to this, please have some patience.

I'm re-jetting a 99 XR100 for a pipe and filter. I've bought a 102 and 105 main from jetsrus.com and swapped in the 105 with no issues.

I'm also changing the pilot from 38 to 40, which I also bought from jetsrus.com.

The pilot I removed has a longer base than the replacement I received. The threads and tip are the same lengths for both. From this I assume the 40 should effectively 'seat' in the same position as the stock 38.

However, the base of the new 40 jet does not extend as far into the bowl- is this a problem?

Hope I've made sense, and thanks in advance for any help.


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