Ok, so I have to admit...I was skeptical at best. I've fallen prey to bloated claims on internet forums before so it's easy to see why, even though it is free, it took me a while to try the 'Smile Maker' mod.
Well, I'm experiencing some downtime due to a brake problem so I went ahead and bit the bullet.
I added the washers drilled the slide and pulled the snorkel.
This mod lives up to it's name. Before, I had to rev the engine pretty good and let the clutch out relatively quickly while pulling back on the bars just to pull the front wheel. After completing this mod I just about landed on my ass just by twisting the throttle and leaning back! Surprised the hell outta me........and put a BIG smile on my face!
There have been plenty of writeups about this so I'll keep mine brief.
Here's some pics.
This is what the carb looks like after you take everything out:
This shows two different sized washers. The total thickness of these was .050" which was what I wanted but the larger of the two washers would not fit down in the white plastic piece so I actually used two of the smaller OD washers which are actually thicker than the larger OD washers:
In the end I ended up with a total washer thickness of .065":
Here's a view of the diaphragm and slide that I don't remember seeing on any of the other writeups:
I used a 7/64ths bit as recommended to drill the slide:
If your on the fence about this.....DO IT!! Well worth it. Only took me about 30 mins but I should say I'm pretty handy with the tools and I had everything I needed right nearby.
Here's a link to the gallery where you can see these pics in hi res: