Hi everyone, I hope you can help point me in the right direction for solving this issue. Sorry for the amount to read but I thought it best to give all the info. Bike and relevant modifications: 1998 996 bip, single injector mod, Termigoni exhaust and chipped to match. Fitted by Pro twins some years ago, before I owned the bike. Recently I have serviced the bike with new oil and air filters, 15w-50 oil, spark plugs and coolant. The bike was running a huge ITG foam filter that filled the airbox and covered the velocity stacks. I replaced it with Pipercross filters in the intakes with the plastic cages. This was a few weeks ago. Over the last few days, maybe a week the bike won't start from cold easily. The battery has plenty of juice and it turns over well but it takes a while to catch and when it does it's not good enough to get it to run. After a few goes you can smell petrol and after charging the battery up and holding the throttle open to clear the flood and maybe a back fire it will start perfectly. A couple of turns and it fires into life like it should. When it has started the gas from the horizontal cylinder exhaust is cold as I'd expect but the gas from the vertical cylinder exhaust has some warmth to it. Once the bike has run, even taking it to the petrol station 1 mile down the road it will start all day with out an issue and then the problem starts again the next morning. Am I right in thinking the bike needs taking to a garage to have the throttle bodies balanced and the CO set to get it back to normal starting? Thanks in advance for wading through all of that to help. It's the only problem I've had with the bike in the 3 years I've owned it so I'd like to get it sorted.
