Rolling Road recommendations

[Sesman]

From the Triumph Rat site.

If your float chamber is fitted with a brass needle valve you may find the valve sealing under its own weight before the float has risen far enough to press it shut. Symptoms of this problem can be that the carburetter takes a long time to tickle, hesitates on pickup and does not idle reliably. A Viton tipped aluminium needle valve is now available that overcomes this problem. It is now fitted as standard equipment to all new Mark 1 Concentric carburetters.

[Laverda Dave]

The Triton has now had the head removed following countless attempts to get it running. Starting it was a three or four kick affair and when it did start it was rough and lumpy. I cleaned the carbs in the ultrasonice cleaner at least 4 times and checked and re-checked the pilot passage was clear. I did a compression check and found one cylinder to be 155psi with the other at 125psi. I had no alternative but to take the head off again as something was clearly wrong. I took the head the SRS Engineering in Sutton and they found the head was porous around the combustion chambers as a result of very poor welding by the 'expert' who built the engine 22 years ago and is the reason why it never ran properly! It is now being welded by Andy at Specialist Welding in Banstead. Once the welding has been completed it will be skimmed by SRS and they will re-blend the combustion chambers to suit.
I'll keep you posted on progress