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Hi, I am not sure if anyone can help but I am extremely frustrated :banghead: because I cannot seem to fix this recurring problem with my Yamaha xs400D 1977. The problem is that I have no power above 4000/5000 rpm. When I open up the throttle the bike nearly goes backwards and I get uneven...

Hi, Well the bike is back in one piece and running. The bike runs really well below 4,700 rpm but once you get above 4,700 rpm the engine runs rough and the engine loses power. However once you get about 5,800 the engine picks up again. I should also mention that it takes a while for the bike...

Hi, I know that this must be one of the most stupid questions of all time but what grade of gasoline should my 1977 xs400D use? :doh: The manual says regular, light leaded fuel. Does this mean that an additive needs to be added to regular unleaded gas? After many months of rebuilding my...

Hi, I am currently renovating all the brakes on my 1977 xs400D. They were in a terrible state. The brake fluid looked like Nuttella rather than hydraulic fluid. To get the caliper pistons out of the caliper, I had to heat up the caliper with a heat gun and apply a little help with a rubber...

I just purchased a stock xs400D that has not been ridden in the last 20 years and it still has (I believe) the original set of tires. I am going to keep the bike as stock as possible and maybe convert it to a cafe racer later on. I am not sure what tires to purchase. Any recommendations...