Tlr200 Carb Mod

[mcman56]

I thought others may find this interesting. A friend has been using a 24mm carb on a TLR200 with very good success. Contrary to expectations, he says it increased bottom end power significantly. The source of the 24mm carb is unknown so I took some measurements and found that the stock 22mm carb is the same casting. The modification involves reworking the engine side by creating a counterbore centered in the o-ring. A taper similar to the original is cut to ease flow. Second, an end mill is dropped down in the throat to increase the height of the oval. Except for a slight difference in the taper, it appears to be an exact match to the 24mm one. I modified one per this procedure and his testing says it works very well. I am doing another for myself so I can test on my own bike. The mod also requires porting the intake manifold to match the larger carb. I have a couple of pics but unfoprtunately the quality is not great. (any suggestions on how to get good pics?) I tried to attach but do not see them as I am posting.