January 1, 2019
I have recently purchased a 1954 non running D1. The previous owner said the bike kept flooding when attempting to start as the throttle slide was worn.
Having removed the slide it most certainly is worn, it is two different colours and when I run my fingers over it I can feel ridges. Replacing the slide is not an
issue, the problem is the inside of the mixing chamber does have some scratches, although not deep I can feel them. My question is does this mean the
carb is trash or can it be polished. Can I simply just install a new slide as this one is over 60 years old.
I would be very grateful to anyone who has experience of this problem and can give me some advice.
January 1, 2019
Hi Mark. I can't really see the slide causing a flooding problem, general running and throttle sticking maybe. Sounds like a new slide is needed anyhow. I don't know what they cost but would think you need to buy one and see how wobbly it is and make sure it returns and runs freely up and down. Be careful if you're thinking of rubbing out scores in the body. Only raised lines need removing as you don't want to increase the clearance any further. It's a very simple device so you should be able to get it running, if not perfectly, on the body you've got.
My D1 had a flooding and leaking problem when I first got it. It was caused by the hole on the bottom or the float bowl that locates the bottom of the float needle being full of crud. This held the float high and raised the fuel level but also stopped the chamber top from sitting down properly. The previous owner fixed this by fitting a very thick gasket to the top of the float bowl. It didn't seal well and leaked fuel but also there was very little room for the float to drop and allow fuel in so the bike would accelerate (a relative term!) run out of fuel, slow down, enough would seep in and off it would go again until it used up a float bowl full and, repeat repeat.... I carefully cleaned it out using a drill bit between my fingers. If you just hold the top on with your fingers and no gasket and shake the carb you should be able to hear the float rattling up and down.
D1, D14/4, Guzzi LeMans, Triumph Trident 900, Maserati 160 t4. Mk1 Mini Traveller, Berkeley T60.
June 23, 2013
June 13, 2015
December 30, 2017
January 1, 2019
Thanks to everyone that replied, I am a novice at this and I appreciate all the help I can get.
Alan I have taken your advice on board, I can hear the float moving so that seems ok. I think I'll spend a few quid on a needle and jet instead of £50 on a throttle slide.
The copper tag for the HT lead on the coil has broken off so I have ordered a new one plus points, condenser and plug. By next weekend I will try to
start her up and fingers crossed she will leap into life.
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