Running rough when gets warm
When cold it start fine first few mins runs spot on till it starts to get warm then it goes ont the three pots then two pot then stops put new plugs in and plug caps tested coils seem ok
Motorcycles - Yamaha - XJR 400
Answers & Comments
Hi Paul:
I'd be suspicious that valve/cam clearances will be questionable.
As components warm up they expand, so clearances get less.
This is one of the maintenance items that I personally leave to the shops with trained mechanics
Here is a link that will give you a LOT of information.
https://www.google.ca/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=Yamaha+XJR+400+Motorcycle+valve+clearannces
Cheers.