Does any one know what the inch dimension is on the stock jets 138= .0xx" 142-.0xx". Just curious..
Thanks.

 

I've never seen a published listing for that info.

 

I want to take the 138 and make it into a 145 the dealer here is out and I've got a 145 and 148 ordered but just wanted to experiment.

 

Horseman

It would take a numbered drill and a speed of 1500 rpm for proper drilling speed as anything else will leave marks on the inside of the jet. Not to mention the 145 is slighly larger in girth than the 138, you drill out the 138 and you will not have enough meat for the needle to seet properly. Been there done that you will have raw fuel pooring into the carb.