I 've got carb kits for my 81 GL100 but I can't figure out how to get a cleaning tool into two Z-shaped ports from the float bowl up into the throat. I 've got a tip-cleaning tool that appears small enough, but it will be too stiff. I can't get it started in the hole anyway, from either end. There's about a 1/8" plug at the change in direction, driven in, clearly not intended to be removed. If I put it all back together w/o doing something about that, and it doesn't run right, I'll be suicidal. At least I'll be breaking things that I'll regret. Ideas?