rocket,
When you say that you can go only 25 mph is that total over all or is that just in first gear? I problem that I did have in the bigging when I put mine on was I also had no performance. What i relaized is even though I thought it was when i floored the petel that is was only opening about 1/4 of the second bararrel. I got the linkage all worked out and made sure that it opened both barrels ALL the way when I mashed the pedal. Is the advance working?
Joseph