home made

Inspired by Jack’s D porting thread and after a very long gestation period my flow bench is almost finished. I had the good fourtune to meet a kind and generous tuner who showed me his home made bench and gave me his spread sheet programme to crunch the numbers. My bench is basically a copy...

Hello Just thought I should share my simple modification to make my short mufflers sound better and be quieter. The bike is a 1972 XS with the stock 650 engine. On the stock head pipes I have two Tapered tip 16 inches long free flowing mufflers. The sound with these mufflers was too loud for...