#2 cylinder hs orifice upsizing

[sandbarDan]

I have a 98 johny fast strike j150glecd. Was reading another post about changing the carb jet size on the 2 cylinder. Is this something I should do on mine. Parts list show my motor to have #69D orifice, the #70D orifice is listed for the 150JL model engines, is this the jet size I should change to? Or maybe the #73D jet that goes in the 175 horse motors? Any help would be appreciated.

[sandbarDan]

how bout changing them all to #70D? or would that cause me to run too rich, carbon bulid up, motor go BOOM, CLUNK.

[THE WITCHDOCTOR]

No need to do yours. Run her like she is....

[sandbarDan]

so then I guess this modification is just for the larger motors then?

[Bassmeister]

Yes, this mod is for the 90* blocks.