Last weekend I stripped the bike down to the cam covers including carb removal. Nothing was done to the carbs apart from setting the TPS to 500. Everything went back together just fine & the bike runs great apart for a small hunt at slow speeds in higher gears round town. When I returned from a ride out after the strip I decided to re balance the carbs as the bike was nice & warm. Before I go on I will just explain my vacuum setup.
The front pot has its own independent hose sealed with the golf tee that is the top one in the photo below. The bottom hose tracks to a tee which branches to the rear pot connection & also to the fuel petcock.
Returning to my carb balancing after my ride out. When I removed the golf tees I noticed a small amount of fuel in both the vacuum hoses. Is this normal? Notice on my setup the 2 hoses are actually below the takeoff points on both pots so possibly gravity is playing a part. If I were to feed them up to near the battery as Cybercarl has done gravity will take it back to the inlets.
your absolutely right, gravity. the air and fuel mixture is around the outlet for the vacuum pipe, when the engine rotates it pulses in and out at the take off point, the fuel then drops out of the air because it becomes momentarily static between the in and out pulse and then gravity takes it down to your golf tee's, personally I would move them so they are above the outlets so there is no danger of petrol getting into your vacuum gauges 'cause that would fook them.
edds11 wrote:your absolutely right, gravity. the air and fuel mixture is around the outlet for the vacuum pipe, when the engine rotates it pulses in and out at the take off point, the fuel then drops out of the air because it becomes momentarily static between the in and out pulse and then gravity takes it down to your golf tee's, personally I would move them so they are above the outlets so there is no danger of petrol getting into your vacuum gauges 'cause that would fook them.
Thanks M8 that has cleared up a small worry. I will extend them even though I use the dual ball coil style balancer which are bullet proof.
