virago 700

[richie]

hi i have had this bike for some time but just finished converting to trike. the problem is that it only seems to run on the rear cylinder until warmed right up, i have good spark and compresion and the air lines are clear any thoughts or advise thanks

[toad]

An air leak that,s being sealed under heat expansion check the rubber inlet manifold their prone to hardening and splitting

[Cabman77]

possibly the black box. Does the rev counter work ok when the rear cylinder is running rough?

[Hagar]

Try looking round on here  ........   http://viragotechforum.com  the site is a bit slow but well worth a look , loosing a pot  front/rear is quite a comman problem , but there seem to be lots of causes , from a weak battery to air leaks in the rubber boots that hold the carbs on , my rear would quit at 3500/4000 rpm , spent god knows how much trying to sort it , turned out it was the alarm I'd had fitted ... I only found out when the box with the alarm in sheared off and went walkies on the A14 , had to bypass the alarm plug  ( well me and the RAC man )  ....  went like a good'n after that  ....

  ..  Hagar  ..

[richie]

hi thanks for the info found an air leak at the inlet manifold will change that and let you know if it works. again cheers

[richie]

running like a dream thanks

[Manky Monkey]

Another small miracle performed.
Next!

[Cabman77]

IT LIVES, IT LIVES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!