Bonneville America Forums Forums Technical Forums General Tech running rough at low speed

More problems with my TBA (05). At low speeds (below 30 mph) the TBA starts running rough. The bike has also started to stall after starting, although will start with twist of the throttle (which I am reluctant to do as I have blown up the air box in the past doing this). Works great at high speeds.

Changed air, oil filters and plugs. I am now thinking it could be a air leak. I had a similar problem in the past when the SAIS hose became loose. Any ideas anyone.
codfish

Is the air injection removed? If so, it may be one of the four vacuum caps either gone or dry rotted. Also, never hurts to check the rubber manifold boots to insure they're snug.

my bike was doing the same went back in to triumph under warranty they changed the low tension coil,and ht leads this fixed it,would just cut out at low speed but ok flat out sounds electical good luck ticky

hi, sorry for the late reply, computer problem and working away. Still have not found the problem, but to be fare I have not had a time to look.
Strange thing is the TBA is difficult to start in the mornings, however when I leave work (sometimes 13 hours later, will start with no problems).

What kind of (if any) mechanical mods have you done? The temp related problem makes me think you you could have jetting issues.

hi ya the bike is bog standard, I have made no mods to it yet although I have a few ideas.