Yellow0206
XS400 Enthusiast
So I have been riding the heck out of this thing and enjoying it a ton. Have been tuning and it runs cery while with one exception, some hesitation/ burbling at 5500-6500. Runs perfect and clean below and above. Have replaced plugs, points, condensor, coils, have rebuilt cleaned carbs, running stock airboxes with new filters, exhaust is aftermarket 2 into 2 with megaphones and baffles, no crossover. Compression is very good about 170psi in both. Timing is perfect, carbs have been synchronised with manometer, valve clearances are correct. I started with 150 Jets went to 145 now at 142.5. Very happy with looks and performance of bike after a lot of work but would like to see if can get rid of this burble.
Any thoughtful ideas based on experience are welcomed.
Any thoughtful ideas based on experience are welcomed.