Posted June 5, 201113 yr Hello everyone, My name is Hambo and I am having problems with my 1983 XS400 Maxim. Ive had it for 10 years with no major problems. I use it as a back up when my other bigger bikes get issues. So as you can imagine it sits for months at a time exept the occasional start up every 2 weeks. My problem is after I ride it for about 8-10 miles it loses power and will not go over 30-40 mph, Ive cleaned the carbs thoroughly(complete breakdown),dumped tank and added new gas, changed the oil and plugs every year, new coils and voltage regulator, new battery(AGM) this year but I cannot figure it out. Any help or suggestions would be greatly appreciated. Thank You.
June 5, 201113 yr Moderator How about tank venting, when the issue arises stop and open the gas cap...hear any rush of air? Greetings
June 6, 201113 yr Author Thanks, Ill give a shot tomorrow Well I went exactly 9.2 miles just like yesterday and it lost power so i opened the gas cap and.......nothing. Still no power on the way home. Feels like its starving for gas and pops a little but no change.Im baffled!
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