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Browni · 26-02-2007, 18:12

Not bad, If I see well the exhaust port is still the original in timing and wideness too so the total port area is quite small, and you enlarge the outlet to 34 mm, don't you think it's too big for that little port?
In my opinion it will be better if you widen the exhaust port to 45-48 mm, so you will have torque too.
The other think is the 28 mm carb vs. standard exhaust.. I hope you have the exhaust without catalyst.

Even those BGM needles are very tapered, but I hope you can adjust the carb. I did some 180 cc tuned runner engines, and they need a quite thick and not very steep needle.

It will be a nice and very usable street bike..

26-02-2007, 18:12	#6 (permalink)
Browni B.A.T tuning	Not bad, If I see well the exhaust port is still the original in timing and wideness too so the total port area is quite small, and you enlarge the outlet to 34 mm, don't you think it's too big for that little port? In my opinion it will be better if you widen the exhaust port to 45-48 mm, so you will have torque too. The other think is the 28 mm carb vs. standard exhaust.. I hope you have the exhaust without catalyst. Even those BGM needles are very tapered, but I hope you can adjust the carb. I did some 180 cc tuned runner engines, and they need a quite thick and not very steep needle. It will be a nice and very usable street bike.. Last edited by Browni; 26-02-2007 at 18:18.